Calibration Guide Agilent Technologies ESG Family Signal Generators Serial Number Prefixes: (Affix Label Here) Part No.
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Contents 1. Equipment Required Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 2. Operation Verification Verification Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 3. Service Software Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Internal Source Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7 VCO Bias Potentiometer Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 Lock Angle Potentiometer Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9 KV versus Frequency Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-7 Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents vi
ESG Family Signal Generators 1 Equipment Required This chapter contains a list of all the recommended equipment required to perform the performance tests and adjustments for the ESG Family Signal Generators.
Equipment Required Required Equipment Required Equipment • HP/Agilent 8902A Measuring Receiver1 Option 010 FM accuracy: ±2% of reading ±1 digit AM accuracy: ±2% of reading ±1 digit Range: 250 kHz to 1300 MHz Filters: 300 Hz high pass and 15 kHz and 3 kHz low pass Detectors: Peak+ • HP/Agilent 54750A Digitizing Oscilloscope Bandwidth: 20 GHz • HP/Agilent 54751/2A Oscilloscope Plug-in Two 20 GHz bandwidth channels • HP/Agilent 54610B Digital Oscilloscope1 Bandwidth: 500 MHz • HP/Agilent 5071A Primary Frequen
ESG Family Signal Generators Equipment Required Required Equipment • HP/Agilent 8904A Function Generator1 Frequency range (sinewave): 0 Hz to 600 kHz AC Amplitude (sinewave only): Range: 0 to 10 Vp-p into a 50Ω load Flatness (>630 mVp-p into 50Ω): ±0.1% (±0.009 dB), 0.1 Hz to 100 kHz • HP/Agilent 53132A Option 050 Universal Counter1 Frequency range: 4 GHz Resolution: 0.
Equipment Required Required Equipment ESG Family Signal Generators Low Noise Amplifiers for Power Level Accuracy Adjustment and Performance Test The power level accuracy adjustment and performance test both use low noise amplifiers. They are required to maintain separation between a low-level signal and the signal analyzer noise floor. The following amplifiers meet the requirements of making this measurement. A +15 Vdc external supply is required for each of the amplifiers.
ESG Family Signal Generators 2 Operation Verification This chapter provides procedures that will either ensure that the signal generator is operating correctly or will help to point to problem areas if it is not. Operation verification does not ensure performance to specifications, but should provide a level of confidence that the signal generator is operating correctly within a minimum amount of time.
Operation Verification Verification Procedures ESG Family Signal Generators Verification Procedures Perform the following procedures in the order they are presented. The tables referenced by the tests are located in the back of the chapter where they can be copied easily. 1. Power On the Signal Generator on page 2-2 2. Check for Error Messages on page 2-3 3. Frequency Range and Accuracy Check on page 2-3 4. Power Level Accuracy Check on page 2-4 5. FM Accuracy Check on page 2-7 6.
ESG Family Signal Generators Operation Verification Verification Procedures 2. Check for Error Messages 1. When the display is lit, check to see if the ERR annunciator is turned on. 2. If the ERR annunciator is turned on, review the error messages in the queue by pressing Utility > Error Info > View Next Error Message. The first error message in the queue will be shown in the text area of the display. Refer to the error messages guide for information about the error message.
Operation Verification Verification Procedures ESG Family Signal Generators 4. For frequencies ≥ 10 MHz: a. Press Amplitude. Enter 0 using the numeric keypad and press the dBm terminator softkey. b. Check that the RF ON annunciator is displayed. If not, press RF On/Off. Configure the Frequency Counter 1. For frequencies < 10 MHz use Input 2. Press 1 MΩ. 2. For frequencies ≥ 10 MHz and ≤ 500 MHz use Input 2. Press 50Ω. 3. For frequencies > 500 MHz use Input 1. Press AUTO.
ESG Family Signal Generators Operation Verification Verification Procedures Configure the Signal Generator 1. Preset the signal generator to normal (factory-defined) preset conditions. 2. Press Frequency. Enter 277 using the numeric keypad and press the kHz terminator softkey. 3. Press Amplitude. Enter 13 using the numeric keypad and press the dBm terminator softkey. 4. Press Mod On/Off. The MOD OFF annunciator is displayed. 5. Press RF On/Off. The RF ON annunciator is displayed.
Operation Verification Verification Procedures ESG Family Signal Generators Configure the Signal Generator 1. Press Frequency. Enter 277 using the numeric keypad and press the kHz terminator softkey. 2. Press Amplitude. Enter −15 using the numeric keypad and press the dBm terminator softkey. Configure the Spectrum Analyzer 1. Preset the spectrum analyzer. 2. Set the analyzer to external 10 MHz reference. 3. Set the center frequency to 277 kHz. 4. Set the frequency span to 100 Hz.
ESG Family Signal Generators Operation Verification Verification Procedures Calculate the Actual Power Level 1. Calculate and record the Actual Power Level, in Table 2-4, as the sum of the Power Meter Reading for −15 dBm and the Spectrum Analyzer Marker (dB) value. For example: • Power Meter Reading for −15 dBm at 2.516 MHz = −14.95 dBm • Spectrum Analyzer Marker (dB) at 2.516 MHz and Power Level Setting at −85 dBm = −70.17 dB • Actual Power Level at 2.516 MHz and −85 dBm: (−14.95) + (−70.17) = −85.
Operation Verification Verification Procedures ESG Family Signal Generators Configure the Measuring Receiver 1. Reset the measuring receiver. 2. Set the measuring receiver to FM mode. 3. Turn on Peak+ detector. 4. Turn on the 300 Hz high-pass filter. 5. Turn on the 3 kHz low-pass filter. Measure the Deviations 1. Set the signal generator to the frequencies shown in Table 2-5, “FM Accuracy,” on page 2-19. 2. Record the deviations measured and compare them to the limits shown in Table 2-5. 6.
ESG Family Signal Generators Operation Verification Verification Procedures Configure the Measuring Receiver 1. Reset the measuring receiver. 2. Set the measuring receiver to AM mode. 3. Turn on Peak+ detector. 4. Turn on the 300 Hz high-pass filter. 5. Turn on the 3 kHz low-pass filter. Measure the Deviations 1. Set the signal generator to the frequencies and depths shown in Table 2-6, “AM Accuracy,” on page 2-19. 2. Record the AM depths measured and compare them to the limits shown in Table 2-6. 7.
Operation Verification Verification Procedures ESG Family Signal Generators Test Tables Table 2-1 Frequency Accuracy Limits Frequency (MHz) 2-10 Lower (Hz) Measured (Hz) Upper (Hz) 0.25 249 999. 250 001. 0.5 499 999. 500 001. 1 999 999. 1 000 001. 10 9 999 999. 10 000 001. 50 49 999 999. 50 000 001. 100 99 999 999. 100 000 001. 500 499 999 999. 500 000 001. 1000 999 999 999. 1 000 000 001. 2000 1 999 999 999. 2 000 000 001. 3000 2 999 999 999. 3 000 000 001.
ESG Family Signal Generators Operation Verification Verification Procedures Table 2-2 Power Level Accuracy Setup 1 (Signal Generators without Option 1E6) Frequency Setting Power Level Setting (dBm) Lower Limit (dBm) 277 kHz +13 12.2 13.8 +7 6.5 7.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +13 12.2 13.8 +7 6.5 7.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +13 12.2 13.8 +7 6.5 7.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +13 12.2 13.8 +7 6.5 7.5 0 −0.5 0.
Operation Verification Verification Procedures Frequency Setting 1950.1 MHz 2310.1 MHz 2985.1 MHz 3225.1 MHz 4000 MHz 2-12 ESG Family Signal Generators Power Level Setting (dBm) Lower Limit (dBm) Measured Power (dBm) −5 −5.5 −4.5 −15 −15.5 −14.5 +10 9.2 10.8 +7 6.5 7.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +10 8.8 11.2 +7 6.1 7.9 0 −0.9 0.9 −5 −5.9 −4.1 −15 −15.9 −14.1 +10 8.8 11.2 +7 6.1 7.9 0 −0.9 0.9 −5 −5.9 −4.1 −15 −15.9 −14.1 +7 6.1 7.
ESG Family Signal Generators Operation Verification Verification Procedures Table 2-3 Power Level Accuracy Setup 1 (Signal Generators with Option 1E6) Frequency Setting Power Level Setting (dBm) Lower Limit (dBm) 277 kHz +9 8.2 9.8 +3 2.5 3.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +9 8.2 9.8 +3 2.5 3.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +9 8.2 9.8 +3 2.5 3.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +9 8.2 9.8 +3 2.5 3.5 0 −0.5 0.5 −5 −5.
Operation Verification Verification Procedures Frequency Setting 1950.1 MHz 2310.1 MHz 2985.1 MHz 3225.1 MHz 4000 MHz 2-14 ESG Family Signal Generators Power Level Setting (dBm) Lower Limit (dBm) Measured Power (dBm) −5 −5.5 −4.5 −15 −15.5 −14.5 +6 5.2 6.8 +3 2.5 3.5 0 −0.5 0.5 −5 −5.5 −4.5 −15 −15.5 −14.5 +6 4.8 7.2 +3 2.1 3.9 0 −0.9 0.9 −5 −5.9 −4.1 −15 −15.9 −14.1 +6 4.8 7.2 +3 2.1 3.9 0 −0.9 0.9 −5 −5.9 −4.1 −15 −15.9 −14.1 +3 2.1 3.
ESG Family Signal Generators Operation Verification Verification Procedures Table 2-4 Power Level Accuracy Setup 2 (All Signal Generators) Frequency Setting Power Level Setting (dBm) 277 kHz −15 2.516 MHz 270.1 MHz 510.
Operation Verification Verification Procedures Frequency Setting 990.1 MHz 1350.1 MHz 1950.
ESG Family Signal Generators Frequency Setting Power Level Setting (dBm) 2310.1 MHz −15 2985.1 MHz 3225.
Operation Verification Verification Procedures Frequency Setting 2-18 ESG Family Signal Generators Power Level Setting (dBm) Power Meter Reading for −15 dBm Spectrum Analyzer Marker (dB) Lower Limit (dBm) Actual Power Level (dBm) Upper Limit (dBm) −65 −66 −64 −75 −76 −74 −85 −86 −84 Calibration Guide
ESG Family Signal Generators Operation Verification Verification Procedures Table 2-5 FM Accuracy Limits (kHz) Frequency (MHz) Deviation (kHz) 500.001 100 kHz 96.48 103.52 750 100 kHz 96.48 103.52 1000 100 kHz 96.48 103.52 Lower Measured Upper Table 2-6 AM Accuracy Limits (%) Frequency (MHz) Depth (%) 200 30 27.5 32.5 200 90 84.5 95.5 300 30 27.5 32.5 300 90 84.5 95.5 501 30 27.5 32.5 501 90 84.5 95.5 750 30 27.5 32.5 750 90 84.5 95.5 1000 30 27.
Operation Verification Verification Procedures 2-20 ESG Family Signal Generators Calibration Guide
ESG Family Signal Generators 3 Service Software The ESG Family Support Software contains the program and supporting files necessary to run the automated performance tests and adjustments for your signal generator. This chapter lists the equipment required to run the software, and gives instructions for installing, administering, using and un-installing the software. For a description of the individual performance tests and adjustments, refer to Chapter 4, “Performance Tests,” and Chapter 5, “Adjustments.
Service Software Required Test Equipment ESG Family Signal Generators Required Test Equipment The following equipment is required to run the software: • Personal computer with the following specifications: • 386/33 MHz CPU, or better • 8 Mbytes of RAM • Hard drive with at least 350 Mbytes free • 16-color VGA monitor • 3.5-inch disk drive • MS Windows 3.x, MS Windows 95, or MS Windows NT.
ESG Family Signal Generators Service Software Installing the ESG_B or ESG_APDP Service Software Installing the ESG_B or ESG_APDP Service Software NOTE If you are installing the ESG_B or ESG_APDP Service Software onto a computer which already has service software older than version A.03.00, you must first remove the old version before installing the new software. Follow this procedure to install the ESG_B or ESG_APDP Service Software on your personal computer. 1. Insert “Disk 1” into the disk drive. 2.
Service Software Installing the ESG_B or ESG_APDP Service Software ESG Family Signal Generators 8. Continue with the setup by selecting the Next button. The ESG Service Software’s, Start Copying Files window is displayed. This window shows the destination directory and the folder name settings. To change these settings, select the Back button until the appropriate window is displayed. NOTE This is the last point that you can cancel the installation.
ESG Family Signal Generators Service Software Uninstalling the Software Uninstalling the Software • MS Windows 95 or Windows NT: 1. Display the Control Panel program group by pressing Start > Settings > Control Panel. 2. Select the Add/Remove Programs icon. 3. From the Install/Uninstall Tab in the Add/Remove Programs properties dialog box: a. Select ESG_B, then select the Add/Remove button. b. Select ESG Service Software, then select the Add/Remove button. 4.
Service Software ESG Family Support Software Administration ESG Family Signal Generators ESG Family Support Software Administration The following section shows you how to administer and run the ESG Family Support Software. The software’s administrative functions allow for the addition or removal of all necessary test equipment, software drivers, and test procedures.
ESG Family Signal Generators Service Software ESG Family Support Software Administration The User Configuration Logging on in User Configuration only allows access to the instrument’s performance tests and adjustments. Refer to “Starting the Software” on page 3-20. The Administration Configuration Logging on in Administration Configuration supports all administrative functions, including the addition of new equipment and the installation of test procedures and device drivers.
Service Software ESG Family Support Software Administration ESG Family Signal Generators 1. Make sure that ESG_B is selected in the Select an Instrument Family list. 2. In the Select Model list, select the instrument model of the DUT to be adjusted or tested. 3. In the Serial Number box, enter the complete serial number of the DUT. 4. In the Address box, enter the two-digit GPIB address of the DUT. (To display the address on the signal generator, press Utility > GPIB/RS-232.
ESG Family Signal Generators Figure 3-3 Service Software ESG Family Support Software Administration Adding Test Equipment Using the Test Equipment Menu 3. Select the model of the device. 4. Click Add. 5. In the New Test Equipment window (refer to Figure 3-4), enter the following parameters into the appropriate box: Serial Number of the new equipment. GPIB Address of the new equipment.
Service Software ESG Family Support Software Administration Table 3-1 ESG Family Signal Generators An Example of Calibration Data for Power Sensors Figure 3-4 Frequency (MHz) Calibration Factor (%) 0.1000 97.6 0.3000 98.9 1.0 99.1 3.0 99.4 Adding the Equipment Information Using the New Test Equipment Window 6. Click OK. NOTE The serial number of the test equipment added will be displayed in the Equipment field of the Test Equipment dialog box (Figure 3-3).
ESG Family Signal Generators Service Software ESG Family Support Software Administration Figure 3-5 Removing and Editing Test Equipment Using the Test Equipment Window 2. Select the model of the test equipment to be removed from the Models field. 3. Select the serial number of the test equipment to be removed from the Equipment field. 4. Click Remove. 5. Click Close. Editing Test Equipment Editing test equipment parameters is accomplished using the Test Equipment dialog box. Refer to Figure 3-5. 1.
Service Software ESG Family Support Software Administration ESG Family Signal Generators Adding Device Drivers Follow these instructions to add test equipment device drivers to the program: CAUTION This and the following procedures: Adding/Removing Device (Test Equipment) Drivers, Adding/Removing Test Drivers, and Adding/Removing Datapacks are included for informational purposes.
ESG Family Signal Generators Service Software ESG Family Support Software Administration Figure 3-7 Adding a Device Driver Using the Test Equipment Drivers Window 5. Refer to Figure 3-8. Using the standard file search procedure, select the driver that you are adding and click OK. Figure 3-8 Using the Open Dialog Box to Search for a Device Driver File to Add The selected driver should now be displayed in the Test Equipment Drivers dialog box, as seen in Figure 3-9.
Service Software ESG Family Support Software Administration ESG Family Signal Generators Removing Device Drivers Removing device drivers is accomplished using the Test Equipment Drivers dialog box. Refer to Figure 3-9. 1. Select the driver (.dll) file to be removed. Figure 3-9 Removing a Device Driver Using the Test Equipment Drivers Window 2.
ESG Family Signal Generators Service Software ESG Family Support Software Administration Figure 3-10 Test Drivers in the File Drop-Down Menu 2. Refer to Figure 3-11. To add a test driver to the existing list of test drivers, click Add.
Service Software ESG Family Support Software Administration ESG Family Signal Generators 3. Refer to Figure 3-12. Using the standard file search procedure, select the test driver that you are adding and click OK. Figure 3-12 Using the Open Dialog Box to Search for a Test Driver File to Add The selected driver should now be displayed in the Test Drivers dialog box, as seen in Figure 3-11. 4. Click Close (Figure 3-11).
ESG Family Signal Generators Service Software ESG Family Support Software Administration Removing Test Drivers Removing test drivers is accomplished using the Test Drivers dialog box. Refer to Figure 3-13. 1. Select the driver (.dll) file to be removed. Figure 3-13 Removing a Test Driver Using the Test Drivers Window 2. Ensure that the information displayed in the Version, Required Devices, and Tests Supported fields reflects the correct information for the selected driver being removed. 3. Click Remove.
Service Software ESG Family Support Software Administration ESG Family Signal Generators Figure 3-14 Datapacks in the File Drop-Down Menu 2. Refer to Figure 3-15. To add a datapack to the existing list of datapacks, click Add. Figure 3-15 Adding a Datapack Using the Datapacks Window 3. Refer to Figure 3-16. Using the standard file search procedure, select the datapack that you are adding and click OK.
ESG Family Signal Generators Service Software ESG Family Support Software Administration Figure 3-16 Using the Open Dialog Box to Search for a Datapack File to Add The selected driver should now be displayed in the Datapacks dialog box, as seen in Figure 3-15. 4. Click Close (Figure 3-15). Removing Datapacks Removing datapacks is accomplished using the Datapacks dialog box. Refer to Figure 3-17. 1. Select the datapack (.000) file to be removed.
Service Software Running the Service Support Software ESG Family Signal Generators Running the Service Support Software Starting the Software 1. Start the software using the steps appropriate for the version of MS Windows that is installed on your PC. • For MS Windows 95: a. Select Start. b. Select HP Service Support for PC’s. c. Select HP Service Software. • For MS Windows version 3.x: a. Open the Program Manager window. b. Open the HP Service Support program group. c. Select the HP Service Support icon.
ESG Family Signal Generators Service Software Running the Service Support Software Identifying the DUT When the DUT Selection dialog box is displayed, 1. Make sure that ESG_B is selected in the Select An Instrument Family list. 2. In the Select Model list, select the signal generator model of the DUT to be adjusted or tested. 3. In the Serial Number box, enter the complete serial number of the DUT. 4. In the Address box, enter the two-digit GPIB address of the DUT.
Service Software Running the Service Support Software ESG Family Signal Generators Selecting Performance Tests or Adjustments and the Test Equipment When the Select Test Equipment and Tests window is displayed, 1. Select either the Performance Tests radio button to display the list of automated performance tests or the Adjustments radio button to display the list of automated adjustments. 2.
ESG Family Signal Generators Service Software Running the Service Support Software 3. Once the test is highlighted, identify all test equipment listed in the Required Test Equipment box. To identify test equipment: a. Select the type of device from the Device Type list. b. Select the model number from the Model list for the device. c. Select the device’s serial number from the Available Test Equipment list. d. Select the Add button to add the device to the list in the Selected Test Equipment box.
Service Software Running the Service Support Software ESG Family Signal Generators 5. If the appropriate tests or adjustments are listed in the Selected Tests box and the appropriate test equipment is listed in the Selected Test Equipment box, select the OK button. Defining the Location where the Test Results are Saved 1. When the Save As dialog box is displayed, select the File Name box and enter the file name into which you would like to save the test results. The results file name suffix is.log.
ESG Family Signal Generators Service Software Running the Service Support Software 2. Once you have selected the drive, folder, and assigned a file name, select the OK button to save these settings for when the tests are complete. Running the Tests and Adjustments Once the HP Service Support Software window is displayed: 1. Select the Run button to start the automated tests or adjustments displayed in the Selected Tests box. The software steps through the tests or adjustments sequentially. 2.
Service Software Running the Service Support Software ESG Family Signal Generators Reviewing the Test and Adjustment Results Once the tests have finished running, you will want to review the results of the tests. The HP Service Support Software window displays the DUT model number and serial number, the selected tests, the results of the selected test, and the current test information. Six buttons, which are used to control the testing, are also displayed.
ESG Family Signal Generators Service Software Running the Service Support Software Restart Rerun a test that was running when the testing was stopped. This restarts the test from the beginning. Next Test Quit running the current test and give it a Fail status. Then, continue testing with the next test. Rerun Restart the testing at the beginning of the first test. Abort Quit testing. Abort all tests.
Service Software Running the Service Support Software 3-28 ESG Family Signal Generators Calibration Guide
ESG Family Signal Generators 4 Performance Tests Unless stated otherwise, the procedures in this chapter enable you to test the electrical performance of the signal generator to its specifications.
Performance Tests ESG Family Signal Generators Calibration Cycle This instrument requires periodic verification of performance. Under normal use and environmental conditions, the instrument should be calibrated every two years. Normal use is defined as about 2,000 hours of use per year. Performance Test Records Unless stated differently, the ESG Family Support Software can print a test record that contains the results of the automated performance tests.
ESG Family Signal Generators Performance Tests Support Software Support Software The ESG Family Support Software runs performance tests and where applicable, generates reports of the results for the tests. The following manual tests are not listed in the software: • Timebase Aging Rate (ESG-AP, ESG-DP or Option 1E5 only) • Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) This chapter shows how to run the software to test and verify the performance of a signal generator.
Performance Tests Support Software Figure 4-2 ESG Family Signal Generators The DUT Selection Window 7. In the Select Test Equipment and Tests window (Figure 4-3), create a list of test equipment that will verify the signal generator’s performance: a. In the Device Type list (item 6), select a device type that you want to add to the equipment list. b. In the Model list (item 7), select the model of the device type that you want to add to the equipment list. c.
ESG Family Signal Generators Figure 4-3 Performance Tests Support Software The Select Test Equipment and Tests Window 8. Create a list of performance tests that you want the software to run (Figure 4-3): a. In the Available Tests list (item 13), select a performance test. b. Click Add (item 14) to add the test to the list of tests that the software will run. You can view the Required Test Equipment list (item 15) for a performance test by clicking on the test title in the Available Tests (item 13) box.
Performance Tests Support Software ESG Family Signal Generators 10.To save the test results to a file, make the following selections (Figure 4-4): a. Click on the Drives window (item 20) and select the drive where you want to save the test results. b. Click on the Save file as type window (item 21) and select the file type for saving the test results. c. Click on the File name window (item 22) and type in a name for the test results file. 11.Click OK (item 23). Figure 4-4 The Save As Window 12.
ESG Family Signal Generators Performance Tests Support Software You can scroll the results window, vertically and horizontally. You can also click on the following buttons during the test sequence: Run Start running the highlighted test when initially starting the testing. Also used to start testing at the same point where the test was stopped. Stop Stop the test that is currently running. The test stops after making the next measurement.
Performance Tests Support Software ESG Family Signal Generators Printing the Performance Test Results 1. To print all the results of the entire test sequence, click File and Print. Exiting the Support Software Program 1. To exit the performance tests program, click File and Exit.
ESG Family Signal Generators Performance Tests 1. Internal FM Accuracy and Distortion 1. Internal FM Accuracy and Distortion These automated tests verify the FM accuracy and distortion specifications. Accuracy is verified directly with a measuring receiver, and distortion is verified by measuring the demodulated output of the measuring receiver, using the audio analyzer. The audio analyzer provides a more accurate verification with better resolution, as opposed to the measuring receiver alone.
Performance Tests 2. Internal AM Accuracy and Distortion ESG Family Signal Generators 2. Internal AM Accuracy and Distortion These automated tests verify the AM accuracy and distortion specifications. For frequencies at or below 1300 MHz, accuracy is verified directly with a measuring receiver, and distortion is verified by measuring the demodulated output from the measuring receiver with an audio analyzer.
ESG Family Signal Generators Performance Tests 2.
Performance Tests 3. Phase Modulation Accuracy and Distortion ESG Family Signal Generators 3. Phase Modulation Accuracy and Distortion These automated tests verify the phase modulation accuracy and distortion specifications. Accuracy is verified directly with a measuring receiver, and distortion is verified by measuring the demodulated output from the measuring receiver, using the audio analyzer.
ESG Family Signal Generators Performance Tests 4. FM Frequency Response 4. FM Frequency Response This automated test verifies the FM frequency response specifications. The equipment measures the variations in frequency deviations due to changes in the applied FM rate; dc to 100 kHz. The variations are expressed relative to a reference signal; 1 kHz rate set at 100 kHz deviation, in dB. Each frequency is tested with this sequence: 1. A reference signal is measured. 2.
Performance Tests 5. AM Frequency Response ESG Family Signal Generators 5. AM Frequency Response This automated test verifies the AM frequency response specifications. The equipment measures the variations in modulation depth due to changes in the applied AM rate; dc to 10 kHz. The response is relative to a 1 kHz rate set at the test depth, and expressed in dB. Each frequency is tested with the following sequence: 1. A reference signal is measured. 2.
ESG Family Signal Generators Performance Tests 5.
Performance Tests 6. Phase Modulation Frequency Response ESG Family Signal Generators 6. Phase Modulation Frequency Response This automated test verifies the phase modulation frequency response specifications. The equipment measures the variations in phase deviations due to changes in the applied ΦM rate; dc to 100 kHz. The response is relative to a 1 kHz reference at the same phase deviation, and expressed in dB. Each frequency is tested with the following sequence: 1. A reference signal is measured. 2.
ESG Family Signal Generators Performance Tests 7. DCFM Frequency Offset Relative to CW 7. DCFM Frequency Offset Relative to CW This automated test verifies the carrier frequency offset, relative to CW. The equipment measures the RF output frequency. For each test point, a comparison is made between a CW reference frequency without DCFM selected, and then with the DCFM selected; the difference is the carrier frequency offset.
Performance Tests 8. Residual FM (ESG-A and ESG-D only) ESG Family Signal Generators 8. Residual FM (ESG-A and ESG-D only) This automated test verifies the residual frequency modulation (FM) specification. The signal generator’s RF output signal is mixed with a signal from a low noise external LO. The resultant IF signal is demodulated as it passes through the measuring receiver, bypassing the measuring receiver’s internal mixer which is inherently more noisy.
ESG Family Signal Generators Performance Tests 8.
Performance Tests 9. Harmonic, Subharmonic, and Nonharmonic Spurious Signals ESG Family Signal Generators 9. Harmonic, Subharmonic, and Nonharmonic Spurious Signals These automated tests verify that the harmonic, subharmonic, and nonharmonic spurious signals are within specifications. The signal generator’s output signal is set to values where harmonic and spurious signal performance problems are most likely to occur.
ESG Family Signal Generators Performance Tests 10. Power Level Accuracy 10. Power Level Accuracy A power meter is used to verify performance over the +13 to –15 dBm range. The absolute power level measured at –10 dBm is used as a reference for all lower level measurements. For power levels below −15 dBm, a vector signal analyzer is used to make relative power measurements.
Performance Tests 10.
ESG Family Signal Generators Performance Tests 10.
Performance Tests 11. Timebase Aging Rate (ESG-AP, ESG-DP or Option 1E5 only) ESG Family Signal Generators 11. Timebase Aging Rate (ESG-AP, ESG-DP or Option 1E5 only) This manual test verifies the accuracy of the signal generator’s internal timebase. The time required for a 360° phase change is measured both before and after a specified waiting period. The aging rate is inversely proportional to the absolute value of the difference in the measured times.
ESG Family Signal Generators Performance Tests 11. Timebase Aging Rate (ESG-AP, ESG-DP or Option 1E5 only) Equipment Setup Figure 4-23 Timebase Aging Rate Test Setup Procedure 1. Preset all instruments and let them warm up for at least one hour. 2. If the oscilloscope does not have a 50Ω input impedance, connect channel 1 through a 50Ω feedthrough. 3. On the oscilloscope, adjust the external triggering for a display of the 10 MHz REF OUTPUT signal from the synthesizer. a.
Performance Tests 11. Timebase Aging Rate (ESG-AP, ESG-DP or Option 1E5 only) ESG Family Signal Generators 4. If the signal drifts a full cycle (360°) in less than 2 minutes, refer to Chapter 5, “Adjustments,” and perform the “Internal Reference Oscillator Adjustment.” After the adjustment, restart this performance test. 5. Watch the oscilloscope display and monitor the time. Notice the time required for a 360° phase change and record this time as T1. 6. Wait 3 to 24 hours.
ESG Family Signal Generators Performance Tests 12. Digital Modulation Level Accuracy 12. Digital Modulation Level Accuracy This automated test verifies the level accuracy of the signal generator’s I and Q modulation inputs. Two arbitrary waveform generators provide the I and Q modulation inputs to the signal generator. A power meter measures the RF output power with and without QPSK modulation applied to the signal generator. The difference in power measurements is the level accuracy.
Performance Tests 13. Internal Digital Modulation Quality ESG Family Signal Generators 13. Internal Digital Modulation Quality NOTE This test is only required for instruments with UN3, UN4, or UN8. This automated test verifies the RF modulation quality of the signal generator’s internal I/Q modulation. A vector signal analyzer is connected to the signal generator’s RF output. The internal baseband generator modulates the RF carrier in each of the available digital modulation formats.
ESG Family Signal Generators Performance Tests 14. Custom I/Q RF Modulation Quality (Option UN8 only) 14. Custom I/Q RF Modulation Quality (Option UN8 only) This automated test verifies the RF modulation quality of the Option UN8 signal generator’s internal real time I/Q baseband modulation. A vector signal analyzer is connected to the signal generator’s RF output. The Option UN8 internal baseband generator modulates the RF carrier in each of the TDMA digital modulation formats.
Performance Tests 14. Custom I/Q RF Modulation Quality (Option UN8 only) ESG Family Signal Generators Figure 4-27 Custom I/Q RF Modulation Quality > 2000 MHz Test Setup Procedure 1. Connect the equipment as shown in Figure 4-26 on page 4-29. 2. Preset all of the equipment. 3. Follow the instructions as they appear on the controller’s display.
ESG Family Signal Generators Performance Tests 15. I/Q Modulation Quality (Options UN3, UN4 & UN8) 15. I/Q Modulation Quality (Options UN3, UN4 & UN8) This test measures the accuracy of the rear-panel I and Q output signals created by the internal baseband generator in Option UN3, UN4, or UN8 signal generators. The vector signal analyzer is configured to measure the I and Q baseband signals and demodulate each modulation type separately.
Performance Tests 16. Pulse Modulation On/Off Ratio ESG Family Signal Generators 16. Pulse Modulation On/Off Ratio This automated test verifies the pulse modulation on/off ratio. The signal generator is configured for an external pulse input. The spectrum analyzer measures the RF output power with and without the external pulse applied. The power difference is the on/off ratio. NOTE This test does not test the high performance pulse circuitry used in Option 1E6 instruments. See “20.
ESG Family Signal Generators Performance Tests 17. Burst Modulation On/Off Ratio (ESG-D only) 17. Burst Modulation On/Off Ratio (ESG-D only) This automated test verifies the burst modulation on/off ratio. The signal generator is configured for an external burst input. The spectrum analyzer measures the RF output power with and without the external burst applied. The power difference is the on/off ratio.
Performance Tests 18. CDMA Adjacent Channel Power (Option UN5 only) ESG Family Signal Generators 18. CDMA Adjacent Channel Power (Option UN5 only) This automated test verifies the energy at an offset to the main channel relative to the total energy in the main channel. Post-processing averaging techniques are used to improve repeatability.
ESG Family Signal Generators Performance Tests 19. Alternate Timeslot Power Settling Time (Option UNA only) 19. Alternate Timeslot Power Settling Time (Option UNA only) This test measures the time required for a waveform envelope to settle within the tolerance of its final amplitude after a sharp amplitude transition provided by the Alternate Timeslot Power feature (Option UNA). Settling time is the result of heating and cooling effects in the step attenuator and ALC loop.
Performance Tests 20. Pulse Rise/Fall Time (Option 1E6 only) ESG Family Signal Generators 20. Pulse Rise/Fall Time (Option 1E6 only) This test checks the rise/fall time performance of the RF carrier when pulse modulated by way of the PULSE IN path. The oscilloscope captures the rising or falling edge of the RF pulse envelope, and calculations are made from the digitized data. Transition time calculated is for the 10% to 90% portion of the envelope.
ESG Family Signal Generators Performance Tests 21. Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) 21. Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) The signal generator’s automated performance tests do not include a test for either phase noise or residual FM. These tests must be done separately and the results attached to the test results obtained with the performance test software.
Performance Tests ESG Family Signal Generators 21. Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) Using an HP/Agilent 8644B Figure 4-34 shows the phase noise results of the DUT using the 8644B as the down-converting source. Note that while it has excellent phase noise above 10 kHz, the results below 10 kHz rapidly degrade. The 60 Hz related noise spikes are typically due to the DCFM method of phase locking the DUT to the E5500.
ESG Family Signal Generators Performance Tests 21. Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) Using an HP/Agilent 8663A Synthesizer Figure 4-35 shows the results of the same DUT measured with a 8663A Synthesizer. In this measurement, the DCFM method was also used to phase lock the DUT to the E5500 system. Again, this produces 60 Hz-related spikes as well as other spurs at 20 and 100 kHz.
Performance Tests ESG Family Signal Generators 21. Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) Using Electronic Frequency Locking (EFC) Figure 4-36 shows the result of using the electronic frequency control (EFC) method of phase-locking the DUT to the E5500 system (see the E5500 manual for set up). This method produces the best result, but is not available on all sources (such as the HP/Agilent 8644B).
ESG Family Signal Generators Performance Tests 21. Measuring Phase Noise and Residual FM (ESG-AP and ESG-DP Series Signal Generators) Figure 4-37 Measuring Residual FM Residual FM is closely related to phase noise. Good phase noise typically implies good residual FM. Directly measuring residual FM at very low levels is difficult, but the HP/Agilent E5500 system can integrate the phase noise results to determine an accurate value.
Performance Tests 22. Dual Arbitrary Waveform Generator Check (Option UND only) ESG Family Signal Generators 22. Dual Arbitrary Waveform Generator Check (Option UND only) This check verifies the functionality of the dual arbitrary waveform generator. A triangular waveform is downloaded into the signal generator and then output to the rear-panel I and Q outputs. An oscilloscope is used to monitor the rear-panel I and Q outputs. NOTE This is not a performance test.
ESG Family Signal Generators Performance Tests 22. Dual Arbitrary Waveform Generator Check (Option UND only) 3. Verify that Channel 1 and Channel 2 are both displaying triangular waveforms approximately 180 degrees out of phase and that they do not have any discontinuities. Refer to the illustration below. • Frequency is approximately 64 kHz. • Amplitude is approximately 1.9 Vp-p. • Both waveforms are symmetrical around 0 volts (the average voltage is approximately 0V).
Performance Tests 23. GSM Loopback BER Check (Option 300 only) ESG Family Signal Generators 23. GSM Loopback BER Check (Option 300 only) This test is a functionality check of the Option 300 GSM BER hardware, and does not test any specifications. The instrument’s RF output is connected to the rear panel 321.4 MHz IF input. The test is made with the RF signal set to 321.4 MHz at 0 dBm.
ESG Family Signal Generators Performance Tests 24. Frac-N Check (ESG-AP, ESG-DP only) 24. Frac-N Check (ESG-AP, ESG-DP only) This test uses the internal analog bus (ABUS) to verify proper operation of the Fractional-N assembly. It also checks for unlocked conditions at frequencies across the tune range. Use this test as a diagnostic tool; it does not verify actual instrument performance. Recommended Equipment No equipment is required. 25.
Performance Tests Performance Test Records ESG Family Signal Generators Performance Test Records The test records at the end of this chapter are provided as masters for you to photocopy. Table 4-1 on page 4-47 provides a place to record the equipment used for the tests in this chapter.
ESG Family Signal Generators Table 4-1 Performance Tests Performance Test Records ESG Family Signal Generators Performance Test Record Test Equipment Used Model Number Model ___________________ Report Number _________________________ Date___________ Arbitrary Waveform Generator ______________ ______________ ______________ Attenuator (6 dB) ______________ ______________ ______________ Attenuator (10 dB) ______________ ______________ ______________ Audio Analyzer ______________ ________
Performance Tests Performance Test Records ESG Family Signal Generators Table 4-2 ESG Family Signal Generators Timebase Aging Rate Performance Test Record Model _____________ Report Number ____________________________ Test Description Timebase Aging Rate ESG-AP, ESG-DP, or Option 1E5 only Table 4-3 Results _____________________ Date ___________ Specification Measurement Uncertainty < ±0.0005 ppm/day 5.
ESG Family Signal Generators 5 Adjustments This chapter contains the adjustment procedures that may be required for the signal generator.
Adjustments Adjustment Relationships ESG Family Signal Generators Adjustment Relationships Anytime an adjustment is made to the signal generator other related adjustments may be affected. For optimal performance, whenever an adjustment is performed, the related adjustments should also be performed.
ESG Family Signal Generators Adjustments Adjustment Relationships FM Accuracy Related Adjustments • KV versus Frequency Calibration • FM Scale DAC Offset Adjustment • FM Path Offset Adjustment • FM In-Band DAC Offset Adjustment • FM Inverting Amplifier Offset Calibration • FM 1/2 Path Ratio Adjustment • Modulation Source Relative Gain Calibration • FM Out-of-Band Calibration • FM Delay Potentiometer Adjustment • FM/PM YO Frequency Compensation Calibration (ESG-AP and ESG-DP only) • FM/PM OB Cal (ESG-AP an
Adjustments Internal Reference Oscillator Adjustment ESG Family Signal Generators Internal Reference Oscillator Adjustment Use this procedure to adjust the internal reference DACs (Digital-to-Analog Convertors). The internal reference oscillator is adjusted with two DACs, one for coarse tuning and one for fine tuning. Using the two DACs, the internal reference oscillator can be adjusted to the resolution of the frequency counter used. This is a manual adjustment.
ESG Family Signal Generators Adjustments Analog Bus ADC Calibration Analog Bus ADC Calibration Description This test is used to calibrate the gain of the ABUS. The ABUS is connected to the ground node (ACOM) and the ADC is zeroed. The ABUS is then connected to the 10 V reference and measured. The result of the measured value divided by the ideal value is the ABUS gain calibration constant. This value is then saved in the signal generator’s firmware.
Adjustments Pretune Calibration (ESG-AP and ESG-DP only) ESG Family Signal Generators Pretune Calibration (ESG-AP and ESG-DP only) Description This adjustment determines the YO offset and gain calibration constants that minimize the YO phase lock error voltage. The phase lock error voltage is measured with the internal analog bus and is minimized at both low and high YO frequencies by controlling the YO pretune DAC.
ESG Family Signal Generators Adjustments Internal Source Calibration Internal Source Calibration Description This test is used to calibrate the internal source amplitude versus frequency. The values for offset and gain are set to their default values in the internal source calibration arrays.
Adjustments VCO Bias Potentiometer Adjustment ESG Family Signal Generators VCO Bias Potentiometer Adjustment Description This test sets the VCO bias potentiometer at a level that will keep the VCO in a stable operating region over the entire frequency and temperature range. First, the F/2 and the lock angle potentiometers are set fully CW (clock-wise). The signal generator is set to 750 MHz and the potentiometer is adjusted until the F/2 oscillations disappear.
ESG Family Signal Generators Adjustments Lock Angle Potentiometer Adjustment Lock Angle Potentiometer Adjustment Description This test is used to optimize the phase detector sampling of the synthesizer phase-locked loop reference frequencies. The lock angle adjustment sets the time during the reference cycle when the ultra-quiet time phase detector measurement occurs. The phase detector needs to make its measurement at the quietest point in the reference cycle.
Adjustments KV versus Frequency Calibration ESG Family Signal Generators KV versus Frequency Calibration Description This test determines the tuning sensitivity of the synthesizer loop. To measure the sensitivity, the tuning voltage is measured as the frequency is stepped from 500 to 1000 MHz in 10 MHz steps. At each incremental frequency the tuning voltage is measured (Vtune1) and again at the incremental frequency +300 kHz (Vtune2).
ESG Family Signal Generators Adjustments AM Audio Path Offset Calibration AM Audio Path Offset Calibration Description This test calibrates the AM path to remove any offset generated when LIN AM, LIN BURST, or LOG BURST are enabled. This test determines the ALC_REF_DAC delta value which is used to correct the offset when the modulation is enabled. This value is then stored in the appropriate calibration constant.
Adjustments Timebase DAC Calibration ESG Family Signal Generators Timebase DAC Calibration Description This test ensures that the signal generator has warmed-up sufficiently and then adjusts the coarse and fine reference timebase DACs for minimum internal reference frequency error. The coarse and fine DAC calibration factors are then stored in the signal generator’s firmware.
ESG Family Signal Generators Adjustments FM Scale DAC Offset Calibration FM Scale DAC Offset Calibration Description This test is used to remove the offset associated with the FM SCALE DAC operational amplifier located on the reference board. This calibration results in a DAC value for FM OFFSET DAC 2. After this DAC value has been properly adjusted, the effects of the FM SCALE DAC value on the offset will be minimized.
Adjustments FM Path Offset Calibration ESG Family Signal Generators FM Path Offset Calibration Description This test is used to remove the offsets associated with the various FM1 and FM2 audio paths on the reference board. When FM is enabled, voltage offsets on the reference and synthesizer boards appear as frequency shifts on the synthesizer VCO. By using a frequency counter to measure the frequency of the VCO, the voltage offsets can be quantified.
ESG Family Signal Generators Adjustments FM In-Band DAC Offset Calibration FM In-Band DAC Offset Calibration Description This test is used to remove the offset associated with the FM IN-BAND DAC located on the synthesizer board. The calibration determines the DAC value for the FM IN-BAND OFFSET DAC on the synthesizer board which will remove the offset. Required Test Equipment • HP/Agilent 53132A Option 050 Universal Counter Procedure Figure 5-12 FM In-Band DAC Offset Calibration 1.
Adjustments FM Inverting Amplifier Offset Calibration ESG Family Signal Generators FM Inverting Amplifier Offset Calibration Description This test is used to remove the offset associated with the differential inverting amplifier on the FM input of the synthesizer board. The calibration determines the DAC value for the FM OFFSET DAC 1 on the reference board which will remove the offset associated with the amplifier. Required Test Equipment • None Procedure 1. Preset the signal generator. 2.
ESG Family Signal Generators Adjustments FM 1/2 Path Ratio Gain Calibration FM 1/2 Path Ratio Gain Calibration Description This test equalizes the gain between the FM1 and FM2 paths. The gain of the FM2 path is adjusted using the FM SCALE DAC and the resulting DAC value is stored in the signal generator’s firmware. This calibration only affects source-independent gains. When uncalibrated sources feed into the paths, the gains are adjusted using the Modulation Source Relative Gain Calibration.
Adjustments Modulation Source Relative Gain Compression Calibration ESG Family Signal Generators Modulation Source Relative Gain Compression Calibration Description This test provides a scaling factor for all of the multiplexed FM modulation inputs. The scaling factor is used by the signal generator’s firmware to scale the actual requested FM deviation from the synthesizer board when the corresponding input is selected. Three scaling factors (EXT1, EXT2, and INT1) are generated during this calibration.
ESG Family Signal Generators Adjustments FM Out-of-Band Calibration (ESG-A and ESG-D only) FM Out-of-Band Calibration (ESG-A and ESG-D only) Description This test adjusts the FM out-of-band deviation to match the in-band FM deviation. It also determines the attenuation values of the out-of-band attenuators and sets the values of some other FM constants. The loop bandwidth of the synthesizer phase-locked loop is approximately 5 kHz.
Adjustments FM Delay Potentiometer Adjustment (ESG-A and ESG-D only) ESG Family Signal Generators FM Delay Potentiometer Adjustment (ESG-A and ESG-D only) Description This test adjusts the match between the delay of the signal passing through the FM in-band path to the delay of the signal passing through the FM out-of-band path. This calibration is the final adjustment required to achieve good FM performance over a wide range of different rates.
ESG Family Signal Generators Adjustments Wide Bandwidth Phase Modulation Calibration (ESG-A and ESG-D only) Wide Bandwidth Phase Modulation Calibration (ESG-A and ESG-D only) Description This test is used to calibrate the phase modulation circuitry on the synthesizer board. The phase modulation has two operational modes: normal and wide bandwidth.
Adjustments FM/PM Out-of-Band Calibration (ESG-AP and ESG-DP only) ESG Family Signal Generators FM/PM Out-of-Band Calibration (ESG-AP and ESG-DP only) Description This adjustment calibrates the FM/PM out-of-band paths on the Fractional-N and YO driver modules. The internal ABUS is connected to the phase lock loop integrator node on each board, and the attenuators and DAC are adjusted to minimize the voltage. This ensures that the in-band and out-of-band paths are matched.
ESG Family Signal Generators Adjustments FM/PM YO Frequency Compensation Calibration (ESG-AP and ESG-DP only) FM/PM YO Frequency Compensation Calibration (ESG-AP and ESG-DP only) Description This adjustment calibrates the FM/PM YIG oscillator frequency compensation latches on the YO driver assembly. These latches adjust the flatness of the YO FM/PM paths for rates greater than 100 kHz.
Adjustments DCFM Calibration ESG Family Signal Generators DCFM Calibration Description This test removes all of the dc offsets associated with the FM path while in DCFM mode. This test uses only the FM1 path to verify the functionality of the circuitry. The resulting values are stored in the signal generator’s firmware. Required Test Equipment • HP/Agilent 53132A Option 050 Universal Counter Procedure Figure 5-20 DCFM Calibration Setup 1. Connect the equipment as shown above. 2.
ESG Family Signal Generators Adjustments Low Frequency (LF) Output Calibration Low Frequency (LF) Output Calibration Description The LF output provides a calibrated audio frequency signal. This test is used to set the full-scale amplitude of the LF-OUT DAC on the reference board. When the calibration is complete, the voltage on the LF output should be equal to the input voltage, plus or minus 1 mV. The resulting DAC values are then stored in the signal generators firmware.
Adjustments External Input Peak Detector Calibration ESG Family Signal Generators External Input Peak Detector Calibration Description This test is used to calibrate the positive trip level of the EXT1 and EXT2 peak detectors located on the reference board. The calibration generates DAC values for the modulation comparator DACs which provide a voltage to the window comparator operational amplifiers.
ESG Family Signal Generators Adjustments Burst Modulator Calibration (ESG-D only) Burst Modulator Calibration (ESG-D only) Description This test is used to adjust the bias modulator circuitry to provide an accurate logarithmic drop in power level for a linear input voltage. When properly adjusted, a one-volt signal on the input will result in a 10 dB drop in power level. The adjustment involves the adjustment of three DACs (BURST BIAS, BURST GAIN, and BURST OFFSET) at several different frequencies.
Adjustments Burst Audio Path Gain Calibration ESG Family Signal Generators Burst Audio Path Gain Calibration Description This test adjusts the scaling of the linear burst audio path until a -0.99 Vdc input to the EXT1 connector results in a 40 dB drop in power relative to 0.00 Vdc input when linear burst is activated. The AM 1 DAC value is changed until this result is achieved and its value is stored as a calibration array.
ESG Family Signal Generators Adjustments Prelevel Calibration, Digital Prelevel Calibration, Digital Description This test calibrates the PRE LEVEL REF DAC on the output board. This DAC is used to control the RF power level that is incident upon the marble I/Q modulator by setting the control point for the prelevel loop. The prelevel loop detector is on the output of the marble I/Q modulator, its drive circuitry on the output board, and its RF modulator on the synthesizer board.
Adjustments Prelevel Calibration, Analog (ESG-A only) ESG Family Signal Generators Prelevel Calibration, Analog (ESG-A only) Description This adjustment determines and stores calibration data for the prelevel reference DAC on the output module. This DAC maintains a consistent RF power level over the full frequency range between the synthesizer module and the output module. Measurements are performed at the RF OUTPUT connector.
ESG Family Signal Generators Adjustments Gain Adjust Calibration Gain Adjust Calibration Description This test calibrates the GAIN ADJUST DAC on the output board. This DAC is used to control the RF power level that is incident upon the switched filters and subsequent RF amplifiers by setting the control point for the gain adjust modulator.
Adjustments Low Noise Floor Gain Adjust (ESG-AP and ESG-DP only) ESG Family Signal Generators Low Noise Floor Gain Adjust (ESG-AP and ESG-DP only) Description This adjustment calibrates the gain adjust DAC on the output module for low noise floor (LNF) mode. The instrument is set up with attenuation applied by way of the burst modulator. This ensures that the RF chain is not in compression. The gain adjust DAC is then set for a specific RF output power, as measured with a power meter.
ESG Family Signal Generators Adjustments ALC Modulation Driver Bias Calibration ALC Modulation Driver Bias Calibration Description This test adjusts the ALC MOD DRV BIAS DAC on the output board. This DAC is used to control the bias current to the ALC modulator driver. It is primarily used to accommodate unmatched VBE values in the drives, but has a strong influence on modulator gain. This test adjusts the DAC until the ALC modulator gain is balanced around its nominal design center.
Adjustments VBLO Mixer Bias Calibration ESG Family Signal Generators VBLO Mixer Bias Calibration Description This test calibrates the VBLO MIXER BIAS DAC on the output board. This DAC is used to control the bias voltage to the internal marble mixers. This DAC is primarily used to adjust the mixer bias for optimum I/Q modulation linearity, but it has a secondary influence on mixer gain.
ESG Family Signal Generators Adjustments Power Level Accuracy Power Level Accuracy Description This test adjusts both power flatness and power level accuracy. First the power flatness and accuracy calibration constants are initialized to zero. Then power flatness is measured with a power meter, and corrected, with the internal attenuator set to 0 dB.
Adjustments Power Level Accuracy ESG Family Signal Generators Procedure 1. Connect the equipment as shown below. 2. Preset all of the equipment. 3. Follow the instructions as they appear on the controller’s display.
ESG Family Signal Generators Adjustments Power Level Accuracy Figure 5-31 Low-Power, Power Level Accuracy (≥ 10 MHz and ≤ 2 GHz) Setup Figure 5-32 Low-Power, Power Level Accuracy (> 2 GHz) Setup Calibration Guide 5-37
Adjustments Level Meter Calibration ESG Family Signal Generators Level Meter Calibration Description This test determines the level meter gain and offset calibration constants on the output board. The level meter function is used when the ALC loop is open. It allows the output power of the signal generator to be monitored and controlled without using the ALC loop. After the level meter gain and offsets are measured, a calibration constant is calculated and stored in the appropriate calibration array.
ESG Family Signal Generators Adjustments ALC Modulation Flatness Calibration ALC Modulation Flatness Calibration Description This test calibrates the ALC REF DAC corrections necessary to maintain power flatness in the ALC open-loop mode of operation. The nominal ALC REF DAC settings are adjusted to re-align the ALC open-loop power with the desired level. The resulting values are stored as calibration arrays in the signal generator’s firmware.
Adjustments AM Gain Calibration ESG Family Signal Generators AM Gain Calibration Description This test adjusts the gain of the AM circuitry to provide a 10 dB drop for a 1 V input signal. First a power level is set and a one-volt signal is connected to the input. AM is enabled and the AM DACs are adjusted for an exact 10 dB drop. The resulting DAC value is stored as a calibration array.
ESG Family Signal Generators Adjustments I/Q Gain/Offset/Quadrature Calibration (ESG-D only) I/Q Gain/Offset/Quadrature Calibration (ESG-D only) Description This test determines the required I/Q gain, offset, and quadrature calibration constants/arrays that will minimize the I/Q modulation imperfections on the output board. Several calibration constants are determined and then the I/Q gain, offset, and quadrature DACs are adjusted over frequency to minimize the static vector modulation errors.
Adjustments I/Q Impairment Adjustment (ESG-D only) ESG Family Signal Generators I/Q Impairment Adjustment (ESG-D only) Description This adjustment sets internal calibration array values to minimize errors in the I/Q adjustments (I/Q gain, I offset, Q offset, and quadrature skew) in the I/Q menu. NOTE This adjustment assumes the I/Q Gain/Offset/Quadrature calibration has already been performed. Required Test Equipment • None Procedure 1. Preset the signal generator. 2.
ESG Family Signal Generators Adjustments Baseband Generator I/Q Gain and Offset Adjustment (ESG-A and ESG-D Options UN3 and UN4 only) Baseband Generator I/Q Gain and Offset Adjustment (ESG-A and ESG-D Options UN3 and UN4 only) Description This adjustment uses a DVM to set the baseband generator’s four potentiometers (I Gain, I Offset, Q Gain, and Q Offset) to minimize the dc offset and set the AC voltage level to 0.5 Vpk (into 50 ohms) at the rear-panel I and Q output connectors.
Adjustments ESG Family Signal Generators Baseband Generator I/Q Gain and Offset Adjustment (ESG-A and ESG-D Options UN3 and UN4 only) Figure 5-36 5-44 Baseband Generator I/Q Gain and Offset Adjustment Location Calibration Guide
ESG Family Signal Generators 6 Maintenance and Service This chapter contains preventive maintenance procedures, and it explains how to return a signal generator to Agilent Technologies for service.
Maintenance and Service Preventive Maintenance Procedures ESG Family Signal Generators Preventive Maintenance Procedures The ESG Family Signal Generators require no regular maintenance. This section contains cleaning procedures for the signal generator. Cleaning the Cabinet Use a damp cloth to clean the exterior of the instrument. Do not use any cleaning products. WARNING To prevent electrical shock, disconnect the signal generator from mains before cleaning.
ESG Family Signal Generators Maintenance and Service Sales and Service Offices Sales and Service Offices Table 6-1 Sales and Service Offices UNITED STATES Instrument Support Center Agilent Technologies (800) 403-0801 EUROPEAN FIELD OPERATIONS Headquarters Agilent Technologies S.A. 150, Route du Nant-d’Avril 1217 Meyrin 2/ Geneva Switzerland (41 22) 780.
Maintenance and Service Sales and Service Offices 6-4 ESG Family Signal Generators Calibration Guide
ESG Family Signal Generators 7 Safety and Regulatory This chapter provides product warranty information, regulatory declarations, information about ESD and restricted materials, and explanations of caution and warning statements marked on the instrument.
Safety and Regulatory Safety Notes ESG Family Signal Generators Safety Notes The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. CAUTION Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, would result in damage to or destruction of the product. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met.
ESG Family Signal Generators Safety and Regulatory Instrument Markings Instrument Markings The following markings and caution and warning labels are used on the instrument. Be sure to observe all cautions and warnings. WARNING No user serviceable parts inside. Refer servicing to qualified personnel. The instruction manual symbol. The product is marked with this symbol when it is necessary for the user to refer to the instructions in the manual.
Safety and Regulatory General Safety Considerations ESG Family Signal Generators General Safety Considerations WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent electrical shock do not remove covers. WARNING This is a Safety Class 1 Product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact.
ESG Family Signal Generators Safety and Regulatory Statement of Compliance Statement of Compliance This product has been designed and tested in accordance with IEC Publication 1010, Safety Requirements for Electronic Measuring Apparatus, and has been supplied in a safe condition. The instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition.
Safety and Regulatory Electrostatic Discharge ESG Family Signal Generators Electrostatic Discharge Electrostatic discharge (ESD) can damage or destroy electronic components. Therefore, all work performed on assemblies consisting of electronic components should be done at a static-free work station.
ESG Family Signal Generators Safety and Regulatory Warranty Warranty This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of three years from date of shipment. During the warranty period, Agilent Technologies will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Agilent Technologies.
Safety and Regulatory Assistance ESG Family Signal Generators Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. For any assistance, contact your nearest Agilent Technologies sales and service office. (See “Sales and Service Offices” on page 6-3.
ESG Family Signal Generators Safety and Regulatory Certification Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standards Organization members.
Safety and Regulatory Certification 7-10 ESG Family Signal Generators Calibration Guide
Index A AC symbol, 7-3 add/remove programs, 3-5 adding datapacks, 3-17 adjustments, 5-1 ALC modulation driver bias, 5-33 ALC modulation flatness, 5-39 AM audio path offset, 5-11 AM gain, 5-40 analog bus ADC, 5-5 baseband generator I/Q gain and offset, 5-43 burst audio path gain, 5-28 burst modulator, 5-27 DCFM, 5-24 external input peak detector, 5-26 FM 1/2 path ratio gain, 5-17 FM delay potentiometer, 5-20 FM in-band DAC offset, 5-15 FM inverting amplifier offset, 5-16 FM out-of-band, 5-19 FM path offset,
Index datapacks (Continued) removing, 3-19 DCFM calibration, 5-24 DCFM frequency offset relative to CW performance test, 4-17 destination folder, 3-3 device drivers adding, 3-12 device type, 3-8 digital multimeter, 1-3 oscilloscope, 1-2 digital modulation level accuracy performance test, 4-27 digitizing oscilloscope, 1-2 drivers device, 3-12 test adding, 3-14 removing, 3-17 dual arbitrary waveform generator check, 4-42 DUT identifying, 3-7, 3-21 DUT selection window, 4-4 E electrostatic discharge, 7-6 red
Index internal AM accuracy and distortion test, 4-10 internal digital modulation quality performance test, 4-28 internal reference oscillator adjustment, 5-4 internal source calibration, 5-7 ISM 1-A symbol, 7-3 K KV versus frequency calibration, 5-10 L level meter calibration, 5-38 list, 4-5 lock angle potentiometer adjustment, 5-9 low frequency output calibration, 5-25 low noise floor (LNF) gain adjust, 5-32 M main test and results window, 4-7 maintenance agreements, 7-8 maintenance and service, 6-1 ma
Index pulse modulation on/off ratio performance test, 4-32 pulse rise/fall time performance test, 4-36 Q QSPK modulation, 4-27 R readme file, 3-4 receiver measuring, 1-2 recommended test equipment, 4-2 records, 2-10, 4-2, 4-46, 4-47, 4-48 removing datapacks, 3-19 removing test drivers, 3-17 removing test equipment, 3-10 required test equipment adjustments, 1-2 performance tests, 1-2 service software, 3-2 verification procedures, 2-2 residual FM performance test, 4-18 returning your signal generator, 6-2
Index test equipment selection service software, 3-22 test records, 4-2, 4-46, 4-47, 4-48 test results printing, 3-27, 4-8 saving, 4-6 viewing, 3-26 test tables, 2-10 timebase aging rate, 4-2 timebase aging rate performance test, 4-24 timebase DAC calibration, 5-12 trace number, 3-9 U uninstalling the software, 3-5 universal counter, 1-3 user configuration service software, 3-7 user information window, 4-3 user name service software, 3-20 V VBLO mixer bias calibration, 5-34 VCO bias potentiometer adjustm
Index I-6 Index
