097-58502-01 Issue 1: Mar 00 58502A Broadband Distribution Amplifier User’s Guide Copyright © 2000 Symmetricom, Inc. All rights reserved. Printed in U.S.A.
This manual provides information on the 58502A Broadband Distribution Amplifier, including performance tests, command reference, functional description, service, and specifications. For assistance, contact: Symmetricom, Inc. 2300 Orchard Parkway San Jose, CA 95131-1017 U.S.A. Call Center: 888-367-7966 (from inside U.S.A. only – toll free) 408-428-7907 U.K. Call Center: +44.7000.111666 (Technical Assistance) +44.7000.111888 (Sales) +44.1604.
Contents In This Guide Guide Organization vii Description of the 58502A Broadband Distribution Amplifier Overview viii Auto-Switching and Alarm-Inputs Features viii RS-232C Port and Indicators Features ix Accessories Supplied and Available ix Supplied ix Manuals ix 1 viii Getting Started 58502A Broadband Distribution Amplifier at a Glance 1-2 Preparing the Distribution Amplifier for Use 1-4 To Mount the 58502A Into an Equipment Rack (Using Option AX4) 1-4 To Connect AC Power 1-5 Connecting a Terminal or
Contents 2 Performance Tests Introduction 2-2 Operational Verification 2-2 Performance Tests 2-2 Calibration (Option 010 Only) 2-2 Test Record 2-2 Test Equipment Required 2-4 58502A Operational Verification 2-5 Equipment 2-5 Outputs (1-12) Verification 2-5 Alarm and Status Output Verification 2-7 RS-232 Verification (Optional) 2-9 58502A Performance Tests 2-11 Equipment 2-11 Input Level Response Tests 2-11 Test 1: +7 dBm Input Level 2-12 Test 2: +15 dBm Input Level 2-13 58502A Performance Test Record (Pag
Contents Alarm Indicator 3-6 Input A and B Indicators 3-6 OUTPUT STATUS 1-12 Indicators 3-6 Serial Interface Ports 3-7 RS-232 Port 3-7 RS-232 Port Configuration 3-7 Making Changes to the Serial Port Settings (If Needed) 3-8 Determining the Serial Port Settings 3-8 Connecting a Terminal or Computer 3-9 To Connect a Terminal or Computer to the 58502A 3-9 Different Ways to Check Alarm Status 3-11 Configuring the Inputs 3-11 To Configure One Input Operation 3-11 To Configure Two-Input Operation 3-11 To Configu
Contents 6 Service Introduction 6-2 Determining 58502A Fault Status 7 6-2 Specifications Introduction 7-2 Index vi User’s Guide
In This Guide This preface contains the following information: • Guide Organization page vii • Description of the 58502A Broadband Distribution Amplifier page viii • Accessories Supplied and Available page ix • Manuals page ix Guide Organization Table of Contents Chapter 1, “Getting Started,” provides an overview of the 58502A Broadband Distribution Amplifier’s indicators, connectors, inputs, and outputs.
In This Guide Description of the 58502A Broadband Distribution Amplifier Overview The 58502A is a 1-to-12 Broadband Distribution Amplifier that is used to distribute precision sine wave signals from Cesium, Rubidium, quartz, or GPS frequency standards. It provides 12 outputs of the source frequency, which can range from 100 kHz to 10 MHz, and is designed for site frequency distribution for manufacturing, R&D, and standards lab environments.
In This Guide RS-232C Port and Indicators Features Querying through the RS232 serial interface port and viewing the front-panel LEDs or indicators facilitate monitoring the system. Registers within the 58502A allow you to query, through the RS232 interface port, the individual distribution input and output channels for the presence or absence of a signal. Front-panel status indicators provide you with a quick visual indication of individual channel health.
In This Guide x User’s Guide
1 Getting Started
1-2 Power Alarm 2 1 5 VRMS MAX INPUTS B 3 ! Input B 1 2 2 3 4 5 6 7 8 OUTPUT STATUS 3 4 5 To avold electric shook: Do not remove covers. 1 4 A see into on bottom Input A WARNING: DISTRIBUTION AMPLIFIER 58502A SYSTEM STATUS 10 11 12 6 ! 7 OUTPUTS No user serviceable parts inside. 9 8 9 10 11 profer all servcing to qualtiled perersonnal. This unit must be earth grounded.
Chapter 1 Getting Started 58502A Broadband Distribution Amplifier at a Glance NOTE See Chapter 3, “Features and Functions,” for a detailed discussion of the items described below. 1 When the Power indicator lights, it indicates that the proper input power is supplied to the 58502A. 6 RS232 serial interface port allows you to remotely control and monitor the 58502A. Its communication language is SCPI. The connector is a DTE configuration DE-9P (male).
Chapter 1 Getting Started Preparing the Distribution Amplifier for Use Preparing the Distribution Amplifier for Use To Mount the 58502A Into an Equipment Rack (Using Option AX4) 1 Position the 58502A on your work surface with the front panel facing you. 2 As shown in Figure 1-1, place the long side of an angle bracket (1), part number 58502-00004, with its four mounting holes aligned with the four holes present on the 58502A front side.
Chapter 1 Getting Started Connecting a Terminal or Computer to the 58502A To Connect AC Power The nominal ac input range is 100-132, 175-240 Vac, 47-63 Hz, 40 VA. The power module or jack senses the incoming voltage and automatically selects the proper setup. Just connect the proper ac power using the supplied power cord. Connecting a Terminal or Computer to the 58502A NOTE You may skip this section if you do not plan to use a terminal or computer; proceed to the power-up procedure, starting on page 1-9.
Chapter 1 Getting Started Connecting a Terminal or Computer to the 58502A to communicate via the RS-232 serial port. Most PCs contain a terminal emulation program, especially PCs equipped with Windows. If your PC does not contain a telecommunication program, purchase one of the following programs: PROCOMM PLUS (DATASTORM Technologies, Inc.®), PROCOMM PLUS for Windows, Cross Talk (Hayes®), or any other terminal emulation program. 3 If you are using an NT®4.
Chapter 1 Getting Started Connecting a Terminal or Computer to the 58502A To Configure Terminal Communications for NT 4.0®/Windows® 95-Based PC 1 In the NT (or Windows 95) main window, click the Start button then select Programs. 2 Select Accessories, Hyperterminal, and Hyper Terminal. The Connection Description dialog box is displayed. 3 In the “Name” window, type 58502A (for example), select one of the icons (the first one will do), then click OK. The Connect To dialog box is displayed.
Chapter 1 Getting Started Connecting a Terminal or Computer to the 58502A To Configure Terminal Communications for Windows®-Based PC 1 Select or double click on the Terminal icon (a picture of a PC with a telephone in front of it) in the Accessories window. 2 Select Settings, then choose Communications. A dialog box is displayed that allows you to configure your PC.
Chapter 1 Getting Started Powering Up the Distribution Amplifier Powering Up the Distribution Amplifier Overview of the Power-Up Procedure (What to Expect) When you power up the 58502A Distribution Amplifier for the first time, you should expect it to run through the following sequence: • front-panel Alarm indicator momentarily flashes, indicating the unit is going through self-test, and • enters steady-state operation, acting as a twelve-channel distribution amplifier.
Chapter 1 Getting Started Powering Up the Distribution Amplifier Terminal or PC HP 24542U, F1047-80002 or equivalent Interface cable (DTE) Outputs to System A B 1 2 3 4 5 6 7 8 9 10 11 12 100-240 VAC 50/60GHz ! 40 VA Max ! Input (s) 5 VRMS MAX ! 58502A Distribution Amplifier RS232 Port (DTE) Figure 1-3.
Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) Using Commands to Control Key Functions (Examples) Overview This section provides you with specific program command examples that perform particular tasks. Enter the examples at the scpi> prompt exactly as they appear to avoid creating an error. If you accidentally make a mistake: • enter the *CLS command to clear the error queue, then • re-enter the correct command string at the scpi> prompt.
Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) Setup Commands for the Different Distribution Applications Distributing One Input Signal (A or B) To determine which input channel is active: enter INP:A:QUES?, and press Return, or enter INP:B:QUES?, and press Return. If 0 is returned, input signal is present. If 1 is returned, input signal is absent. The 58502A will distribute the one signal present regardless of which input channel is used.
Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) To Check the Input Channel Automatic Switching Status Enter INP:SEL:AUTO?, and press Return. If 0 is returned, automatic switching is disabled. If 1 is returned, automatic switching is enabled. To Enable the Input Channel Automatic Switching Enter INP:SEL:AUTO 1, and press Return. To Disable the Input Channel Automatic Switching Enter INP:SEL:AUTO 0, and press Return.
Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) Distributing of the Backup Oscillator (Option 010) Signal Only Just apply ac power to the 58502A. After powerup, allow the oscillator to warm up for 5 minutes before using the signal. You do not have to send a command. The oscillator will provide the output signals.
Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) To Check Instrument Identification Enter *IDN?, and press Return. A quoted identification string is returned, similar to the following: HEWLETT-PACKARD, 58502A,3426A–00123,3422 – A To Clear the Error Queue Enter *CLS, and press Return. The error message disappears and the scpi> prompt returns.
Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) To Set Baud Rate, Pacing, Parity, and Data Bits To set the baud rate, for example, to 19200, enter SYST:COMM:SER:BAUD 19200 and press Return. To set pacing, for example, to XON enter SYST:COMM:SER:PACE XON and press Return. To see how pacing is currently set, enter SYST:COMM:SER:PACE? and press Return. To set parity, for example, to ODD enter SYST:COMM:SER:PARITY ODD and press Return.
2 Performance Tests Verifying Specifications
Chapter 2 Performance Tests Introduction Introduction This chapter provides procedures to test the electrical performance of the 58502A Distribution Amplifier specifications listed in Chapter 7, “This chapter provides electrical specifications and supplemental characteristics for the 58502A Broadband Distribution Amplifier. Electrical specifications describe the instrument’s warranted performance.
Chapter 2 Performance Tests Introduction User’s Guide 2-3
Chapter 2 Performance Tests Test Equipment Required Test Equipment Required Table 2-1.
Chapter 2 Performance Tests 58502A Operational Verification 58502A Operational Verification These following procedures check the standalone functionality of the 58502A Broadband Distribution Amplifier. Equipment • Signal Generator: HP 8663A • Oscilloscope: HP 54600B • 50Ω BNC Feedthrough: HP 10100C (Use the 50Ω feedthrough if you are using the HP 54600B Oscilloscope; however, if you are not using this scope DO NOT use the 50Ω feedthrough.
Chapter 2 Performance Tests 58502A Operational Verification 3 Connect the equipment as shown in Figure 2-1. (Connect the Signal Generator output to the 58502A’s input A or B rear-panel input, and connect oscilloscope Channel 1 to output 1 port of the 58502A.
Chapter 2 Performance Tests 58502A Operational Verification Alarm and Status Output Verification 1 Connect the equipment as shown in Figure 2-2, using output 12 as the test output. (Note that any one of the outputs can be used for this alarm verification.) HP 8663A Sythesized Signal Generator or equivalent Output N-to-BNC Connector (1250-0780) BNC Cable Input A or B A B 58502A Distribution Amplifier 1 2 3 4 5 6 7 8 9 10 11 12 100-240 VAC 50/60GHz ! 40 VA Max ! 5 VRMS MAX ! Figure 2-2.
Chapter 2 Performance Tests 58502A Operational Verification Outputs GND GND 1 2 6 3 7 4 8 5 9 GND Figure 2-4. ALARM/STATUS Port If the Alarm indicator illuminates and output pins 2, 3, and 4 go low, then all associated ALARM/STATUS output circuitry is functional. 4 Mark Pass or Fail in Line 2 on the Operational Verification portion of the 58502A Performance Test Record, located on page 2-14. This completes the operational verification.
Chapter 2 Performance Tests 58502A Operational Verification RS-232 Verification (Optional) NOTE You may skip this verification if you do not plan to use the RS232 port. 1 Apply the proper power source to the rear-panel AC input jack of the Distribution Amplifier.
Chapter 2 Performance Tests 58502A Operational Verification 4 Set the RS-232 port of your PC to match the following default values: Pace:NONE Baud Rate: 9600 Parity: NONE Data Bits: 8 Stops Bits: 1 If needed, see “Connecting a Terminal or Computer to the 58502A” starting on page 1-5 in Chapter 1 for information on setting above parameters. a. Press Return (or Enter) key on the PC. The scpi> prompt should be displayed. b. At the prompt, type *IDN? c. Press Return.
Chapter 2 Performance Tests 58502A Performance Tests 58502A Performance Tests These tests verify the specified electrical performance of the 58502A Distribution Amplifier. The tests do not require access to the inside of the instrument and do not test typical specifications or supplementary characteristics. If the performance test is to be considered valid, the following conditions must be met: • Instrument being tested is powered on and warmed up. • Tests are conducted as presented in this section.
Chapter 2 Performance Tests 58502A Performance Tests Test 1: +7 dBm Input Level 1 Apply power to the 58502A and observe successful completion of self-test. 2 Set the signal generator to: FREQUENCY: 10 MHz LEVEL: +7 dBm 3 Connect the signal generator output to the 58502A input A or B rearpanel input connector as shown in Figure 2-6. 4 Connect the RMS voltmeter via the 50Ω load to the 58502A Output 1 as shown in Figure 2-6.
Chapter 2 Performance Tests 58502A Performance Tests Test 2: +15 dBm Input Level 1 Using the same test setup (see Figure 2-6) and the RMS voltmeter still set to 3V Full Scale Range, adjust the signal generator to: LEVEL: +15 dBm 2 Verify that the RMS voltage on each of the twelve Outputs is from 0.707 to 1.12 Vrms. 3 Record the reading of each output channel on the Performance Tests portion of the 58502A Performance Test Record in the Test 2 section, located on page 2-15.
Chapter 2 Performance Tests 58502A Performance Test Record (Page 1 of 2) 58502A Performance Test Record (Page 1 of 2) Model 58502A Broadband Distribution Amplifier Serial Number:_______________________________ Repair/Work Order No.
Chapter 2 Performance Tests 58502A Performance Test Record (Page 2 of 2) 58502A Performance Test Record (Page 2 of 2) 58502A Performance Tests (Continued) Input Level Response Tests (Continued) Test 2: +15 dBm Input Level Minimum Actual Reading (Outputs 1 – 12) Maximum 0.707 Vrms < 1. ________________________ < 1.12 Vrms 0.707 Vrms < 2. ________________________ < 1.12 Vrms 0.707 Vrms < 3. ________________________ < 1.12 Vrms 0.707 Vrms < 4. ________________________ < 1.12 Vrms 0.
Chapter 2 Performance Tests 58502A Calibration (Option 010 Only) 58502A Calibration (Option 010 Only) This section provides procedures to perform routine periodic calibration of the Option 010 Broadband Distribution Amplifier. Overview The following procedure uses software commands to calibrate the oscillator. NOTE The optional oscillator of the 58502A has a specified aging rate of ±5 × 10−10 per day (±1 × 10−7/year).
Chapter 2 Performance Tests 58502A Calibration (Option 010 Only) Equipment • 10 MHz Primary Frequency or House Standard: HP 5071A (or equivalent) • Terminal or computer (PC): Any Model with communication software and RS-232 connection • HP 53131A Universal Counter (or equivalent) • HP 24542U (or F1047-80002) (or equivalent) Serial Interface Cable • HP 10100C 50Ω BNC Feedthrough (or equivalent) • Two BNC Cables (1 meter, male-to-male) Procedures Determining Frequency Difference The frequency dif
Chapter 2 Performance Tests 58502A Calibration (Option 010 Only) Port1 10 MHz External Reference Out BNC Cable Ref.
Chapter 2 Performance Tests 58502A Calibration (Option 010 Only) 2 Use the terminal and serial port to send one of the following SCPI commands to incrementally adjust the EFC control signal to bring the oscillator frequency closer to 10 MHz: DIAG:CAL:ROSC:EFC:ABS UP (or) DIAG:CAL:ROSC:EFC:ABS DOWN Where UP increases frequency and DOWN decreases frequency.
Chapter 2 Performance Tests Calibration Record (Page 1 of 1) Calibration Record (Page 1 of 1) Model 58502A Option 010 Broadband Distribution Amplifier Serial Number: ___________________________ Repair/Work Order No.
3 Features and Functions
Chapter 3 Features and Functions Chapter Contents Chapter Contents You will find that this chapter makes it easy to look up all the details about a particular feature of the 58502A Broadband Distribution Amplifier.
Chapter 3 Features and Functions Inputs Inputs AC Input ~AC Input This rear-panel ac power module or jack senses the incoming voltage and automatically selects the proper setup. The nominal ac input range is 100-132, 175-240 Vac, 47-63 Hz, 40 VA. 100-240 VAC 50/60GHz ! 40 VA Max INPUTS A and B Ports INPUTS B A ! These rear-panel 50Ω BNC input connectors or ports allow two-input signal connection to the 58502A.
Chapter 3 Features and Functions Outputs ALARM/STATUS RS232 ALARM/STATUS Port This DE-9P (male) subminiature D connector or port allows you to monitor the status of the 58502A via pins 2, 3, and 4 (see Table 3-1). This port also allows you to receive compatible BITE (Built In Test Equipment) alarm inputs from the 58503A GPS Time and Frequency Reference Receiver and the HP 5071A Primary Frequency Standard via pins 6 and 7. The pin assignments are described in Table 3-1. Table 3-1.
Chapter 3 Features and Functions Outputs ALARM/STATUS Port Inputs The input pins (6 and 7) of this port are shown in Figure 3-2. The input pins are a TTL high (3.5 Vdc, minimum) when operation is normal, and TTL low (1.5 Vdc, maximum) if there is an alarm. ALARM/STATUS 1 2 6 3 7 4 8 5 9 Alarm Inputs Figure 3-2. Alarm Inputs Always connect the input A input device to pin 6 of the ALARM/STATUS connector, and connect the input B input device to pin 7. Do NOT use or ground pin 8.
Chapter 3 Features and Functions Indicators Indicators Power Indicator SYSTEM STATUS Power Alarm Input A Input B This indicator lights when the input power is supplied to the 58502A. The indicator cannot be set or queried via the serial interface. Alarm Indicator This indicator lights when an alarm is detected in the distribution system.
Chapter 3 Features and Functions Serial Interface Ports Serial Interface Ports ALARM/STATUS RS232 RS-232 Port This 9-pin male subminiature D (DE-9P) rear-panel connector is a RS-232 DTE configuration serial interface port. It allows serial interface connection to an external computer for remote operations. This serial interface port allows you to remotely control and monitor the 58502A. See the section “Connecting a Terminal or Computer” starting on page 3-9 for information on interface cable use.
Chapter 3 Features and Functions Serial Interface Ports Making Changes to the Serial Port Settings (If Needed) CAUTION If you change the serial port settings, your changes will be stored in the 58502A. Cycling power will not reset to factory defaults. Therefore, if you make a change, it is recommended that you record the settings and keep the record with the 58502A. If you need to change the serial port settings, for example, to set up for a different computer, use the guidelines given in this section.
Chapter 3 Features and Functions Connecting a Terminal or Computer Issue the following queries to the serial port to verify its configuration. SYST:COMM:SER:PACE? SYST:COMM:SER:BAUD? SYST:COMM:SER:PARITY? SYST:COMM:SER:BITS? SYST:COMM:SER:SBITS? Connecting a Terminal or Computer To connect the 58502A to a terminal or computer, you must have the proper interface cable. Most computers are DTE (Data Terminal Equipment) devices.
Chapter 3 Features and Functions Connecting a Terminal or Computer Terminal or PC HP 24542U, F1047-80002 or equivalent Interface cable (DTE) 58502A Distribution Amplifier A B 1 2 3 4 5 6 7 8 9 10 11 12 100-240 VAC 50/60GHz ! 40 VA Max ! 5 VRMS MAX ! RS232 Port (DTE) Figure 3-3.
Chapter 3 Features and Functions Different Ways to Check Alarm Status Different Ways to Check Alarm Status The 58502A provides three ways to check its alarm status: visually viewing the front-panel indicators, querying for status via the RS232 port, and monitoring the ALARM/STATUS port. Configuring the Inputs The 58502A Broadband Distribution Amplifier can be manually operated, or operated with a computer or terminal for enhanced features.
Chapter 3 Features and Functions Configuring the Inputs To Configure the Internal Oscillator as a Backup (Option 010) Connect the input signal to input A . Then connect the 58502A to ac power. The internal oscillator will provide the source signal for the 58502A only if input A signal fails. After powerup, allow the oscillator to warm up for 5 minutes before using the signals.
4 Command Reference
Chapter 4 Command Reference Chapter Contents Chapter Contents This chapter provides a description for each command that can be used to operate the 58502A Broadband Distribution Amplifier. This chapter is organized as follows: • SCPI Conformance page 4-3 – Command Syntax Conventions page 4-3 – IEEE 488.
Chapter 4 Command Reference SCPI Conformance Information SCPI Conformance Information The Standard Commands for Programmable Instruments (SCPI) commands used in the 58502A are in conformance with the SCPI Standard Version 1992.0. Command Syntax Conventions [ ] An element inside brackets is optional. Note, the brackets are NOT part of the command and should not be sent to the instrument. 1|2 Means use either 1 or 2. Means enter a number.
Chapter 4 Command Reference 58502A Command Summary 58502A Command Summary Table 4-1 lists and briefly defines all of the commands that can be used to operate the 58502A. Table 4-1. 58502A Command Summary Keyword/Syntax Parameters *CLS Description Clears error queue. *IDN? returns unquoted string Returns identification string. :ALARm? returns 0 or 1 0 = alarm is off, 1 = alarm is on. Alarm is on when any of the outputs are not functional.
Chapter 4 Command Reference 58502A Command Summary Table 4-1. 58502A Command Summary (Continued) Keyword/Syntax Parameters INPut (Continued) :AUTO :AUTO? Description INPUT Subsystem (Continued) append 0 or OFF, or Enables or disables the automatic input switching feature. 0 or OFF disables it while 1 or ON enables it. This setting is stored 1 or ON in non-volatile memory. returns 0 or 1 Query.
Chapter 4 Command Reference System Status Reporting Commands System Status Reporting Commands *CLS This command clears the error queue. ALARm? This query returns alarm status of the 58502A. Returns a single character, 0 or 1. A value of 0 indicates alarm is off; a value of 1 indicates alarm is on. If any of the outputs are not functional or there is an input alarm (there may be additional internal conditions that generate alarm), 1 is returned.
Chapter 4 Command Reference System Status Reporting Commands OUTPut:QUEStionable[:UNPacked]? This query returns the status on each output (lowest numbered output to highest). Returns array of Boolean. 0 = signal at output; 1 = no signal at output. Same result as PACKed? (see prior command), but information on each output is provided with separate value.
Chapter 4 Command Reference Identification Command Identification Command *IDN? This query returns the 58502A identification. A sequence of ASCII-encoded bytes: HEWLETT-PACKARD, 58502A, XXXXY–ZZZZZ, WWWW – V where 58502A is the product model number, XXXXYZZZZZ is the product serial number, and WWWW is the product’s firmware revision date code, and V is the hardware revision letter. In the product serial number (XXXXY–ZZZZZ): – XXXX is a four-digit prefix that identifies a series of instruments.
Chapter 4 Command Reference Internal Oscillator Calibrating and Status Commands (Option 010 Only) Internal Oscillator Calibrating and Status Commands (Option 010 Only) DIAGnostic:CALibration:ROSCillator:EFC:ABSolute UP | DOWN This command sets the absolute EFC (electronic frequency control) of the oscillator. Use UP or DOWN to adjust the EFC by the increment specified in the STEP command described below.
Chapter 4 Command Reference Internal Oscillator Calibrating and Status Commands (Option 010 Only) [SOURce]:ROSCillator:WARM? This query reports if the internal oscillator is warmed up. Returns a single character, 0 or 1. A value of 0 indicates oscillator is not warm. A value of 1 indicates oscillator output is warm.
Chapter 4 Command Reference Input Port Status and Setup Commands Input Port Status and Setup Commands INPut:A:QUEStionable? This query reports if there is a signal present on input A. Returns a single character, 0 or 1. A value of 0 indicates signal is present (not questionable). A value of 1 indicates no signal is present. INPut:B:QUEStionable? This query reports if there is a signal present on input B or backup oscillator (Option 010). Returns a single character, 0 or 1.
Chapter 4 Command Reference Input Port Status and Setup Commands INPut:SELect? This query indicates which input is selected as the source input. Returns single character, A or B. INPut:SELect:AUTO 0 | 1 This command enables or disables the automatic input switching feature. This setting is stored in non-volatile memory. Use 0 (OFF) to disable auto-switching. Use 1 (ON) to enable auto-switching. INPut:SELect:AUTO? This query returns the state of the automatic input switching feature.
Chapter 4 Command Reference Serial Interface Communication Commands Serial Interface Communication Commands SYSTem:COMMunicate:SERial:BAUD This command sets the baud rate of the RS-232 port. The possible baud rate values that can be entered are 1200, 2400, 9600, or 19200. The baud rate value is stored in non-volatile memory. It is unaffected by powerup. SYSTem:COMMunicate:SERial:BAUD? This query returns the baud rate value of RS-232 port. Returns a an integer.
Chapter 4 Command Reference Serial Interface Communication Commands SYSTem:COMMunicate:SERial:FDUPlex? This query returns the duplex state of the RS-232 port. Returns a single character, 0 or 1. A value of 0 indicates echo is OFF; a value of 1 indicates echo is ON. SYSTem:COMMunicate:SERial:PACE XON | NONE This command sets flow control of the RS-232 port. The choices are XON or NONE. The software pacing or flow control state is stored in non-volatile memory. It is unaffected by powerup.
5 Functional Description
Chapter 5 Functional Description Introduction Introduction This chapter gives a simplified functional description of the 58502A Broadband Distribution Amplifier. The 58502A provides twelve-channel isolation and distribution for a input timing signal, which frequency can range from 100 kHz to 10 MHz.
Chapter 5 Functional Description Functional Block Description of the 58502A Functional Block Description of the 58502A The 58502A electronic circuits consist of five primary blocks: • Controller • Panel LEDs • 2-to-1 Switch • 1-to-12 Amplifiers and Isolators • Power Supply Module Figure 5-1 is a simplified, overall-block diagram the 58502A circuitry.
Chapter 5 Functional Description Functional Block Description of the 58502A Controller Block This block provides remote instrument management via commands transferred through the RS-232 serial port. It also provides hardware output alarm signals via the Alarm/Status connector that go active when the controller block lights the front-panel system status alarm indicator. Alarm inputs are received and processed by the controller block.
Chapter 5 Functional Description Functional Block Description of the 58502A 1-to-12 Amplifiers and Isolators Block This block consists of twelve separate individual isolation amplifiers that accomplish the distribution of the source frequency (ranging from 100 kHz to 10 MHz) into twelve available output channels with very low phase noise and signal distortion at the rear-panel output BNC connectors.
Chapter 5 Functional Description Functional Block Description of the 58502A 5-6 User’s Guide
6 Service
Chapter 6 Service Introduction Introduction This chapter provides the information required to determine if the 58502A Broadband Distribution Amplifier is faulty. Determining 58502A Fault Status Use the following procedure to determine fault status of the 58502A Distribution Amplifier. 1 Perform the Power-on Self test as described in Chapter 1, “Getting Started,” of this guide. If self test passes, go to step 2. If the test fails, go to step 5.
7 Specifications
Chapter 7 Specifications Introduction Introduction This chapter provides electrical specifications and supplemental characteristics for the 58502A Broadband Distribution Amplifier. Electrical specifications describe the instrument’s warranted performance. Supplemental characteristics are intended to provide information useful to apply to the instrument by giving typical or nominal, but non-warranted performance parameters.
Chapter 7 Specifications Introduction Electrical Specifications Environmental Specifications Input, A or B Temperature Frequency Range: Impedance: 0.1 MHz to 10 MHz 50Ω nominal SWR <1.
Chapter 7 Specifications Introduction 7-4 User’s Guide
Index auto-switch feature, viii auto-switching feature, viii SYSTEem COMMunicate SERial1 BAUD?, B 4-13 SYSTem COMMunicate BAUD?, 4-13 BITS?, 4-13 FDUPlex?, 4-14 PACE?, 4-14 PARity?, 4-14 SERial BAUD, 4-13 FDUPlex?, 4-14 PACE, 4-14 PACE?, 4-14 SERial1 BITS?, 4-13 FDUPlex, 4-13 PARity, 4-14 PARity?, 4-14 SYMBOLS (PORT†2, 4-13, 4-14 *CLS, 4-6 *IDN?, 4-8 commands OUTPut QUEStionable, 4-7 OUTPut:QUEStionable, 4-7 OUTPut:QUEStionable, 4-7 ?, 4-7 NUMERICS 183, 4-8 A AC Input jack, 1-3 ac power, 1-5, 5-5 a
Index SYSTem:COMMunicate:SERial:BAUD , 4-13 SYSTem:COMMunicate:SERial:BAUD ?, 4-13 SYSTem:COMMunicate:SERial:BITS?, 4-13 SYSTem:COMMunicate:SERial:FDUP lex, 4-13 SYSTem:COMMunicate:SERial:FDUP lex?, 4-14 SYSTem:COMMunicate:SERial:PACE, 4-14 SYSTem:COMMunicate:SERial:PACE ?, 4-14 SYSTem:COMMunicate:SERial:PARit y, 4-14 SYSTem:COMMunicate:SERial:PARit y?, 4-14 SYSTem:ERRor?, 4-7 communication, serial interface port, 4-13, 4-14 communications SCPI, 1-5 TIME OF DAY, 1-5 computer connecting, 3-9 PC, 1-5 termina
Index Input B indicator, 1-3 input channel, 4-5 input channels, viii Input Level Response Test, 2-11 input ports, viii input A, viii input A, 3-3 Input A indicator, 3-6 input B, viii, 3-3 Input B indicator, 3-6 INPut:A:QUEStionable?, 4-11 INPut:ALARM?, 4-11 INPut:SELect, 4-11 INPut:SELect:AUTO, 4-12 INPut:SELect:AUTO?, 4-12 INPut:SELect:DEFault, 4-12 INPut:SELect:DEFault?, 4-12 INPut:SELect?, 4-12 inputs A and B, 1-3, 3-3 ac input, 3-3 configuration, 3-11 INPUTS A and B connectors, 1-3 installing rack moun
Index RS-232 port factory default values, 3-7 setting, 1-7, 1-8 RS-232 serial interface port, 1-3 RS232C interface, 4-13, 4-14 RS-232C parameters, 3-7 Rubidium, viii S secondary input signal, 3-11 self-test, 1-9 serial interface cables, 3-9 serial interface ports, 3-7 serial number, 4-8 serial port configuring, 1-7, 1-8 factory default values, 3-7 RS-232, 1-3 setting, 1-7, 1-8 serial port settings, 3-8 changing, 3-8 determining, 3-8 settings, serial port, 3-8 signal distribution, 1-11 Signal Generator, 2-
