MU368060A AWGN Unit Operation Manual Fourth Edition • Read this manual before using the equipment. • To ensure that the equipment is used safely, read the "For Safety" in the MG3681A Digital Modulation Signal Generator Operation Manual first. • Keep this manual with the equipment. ANRITSU CORPORATION Document No.: M-W1955AE-4.
MU368060A AWGN Unit Operation Manual 1 1 August 2001 (First Edition) December 2003 (Fourth Edition) Copyright © 2001-2003, ANRITSU CORPORATION. All rights reserved. No part of this manual may be reproduced without the prior written permission of the publisher. The contents of this manual may be changed without prior notice.
Equipment Certificate Anritsu Corporation certifies that this equipment was tested before shipment using calibrated measuring instruments with direct traceability to public testing organizations recognized by national research laboratories including the National Institute of Advanced Industrial Science and Technology, and the Communications Research Laboratory, and was found to meet the published specifications.
Notes On Export Management This product and its manuals may require an Export License/Approval by the Government of the product's country of origin for re-export from your country. Before re-exporting the product or manuals, please contact us to confirm whether they are export-controlled items or not. When you dispose of export-controlled items, the products/manuals are needed to be broken/shredded so as not to be unlawfully used for military purpose.
CE Conformity marking Anritsu affixes the CE Conformity marking on the following product (s) in accordance with the Council Directive 93/68/EEC to indicate that they conform with the EMC and LVD directive of the European Union (EU). CE marking 1. Product Model Plug-in Units: MU368060A AWGN Unit 2. Applied Directive and Standards When the MU368060A AWGN Unit is installed in the MG3681A, the applied directive and standards of this Unit are conformed to those of the MG3681A main frame.
C-tick Conformity marking Anritsu affixes the C-tick marking on the following product (s) in accordance with the regulation to indicate that they conform with the EMC framework of Australia/New Zealand. C-tick marking 1. Product Model Plug-in Units: MU368060A AWGN Unit 2. Applied Directive and Standards When the MU368060A AWGN Unit is installed in the MG3681A, the applied directive and standards of this Unit are conformed to those of the MG3681A main frame.
About This Manual This operation manual offers an overview, sample measurement and remote control of the MU368060A AWGN Unit. The MU368060A AWGN Unit is mounted to the MG3681A Digital Modulation Signal Generator. represents a panel key. The "MG3681A Digital Modulation Signal Generator Operation Manual" is provided separately. Refer to them together with this manual.
Table of Contents About This Manual........................................ Section 1 1.1 1.2 Overview .................................... 1-1 Product Outline............................................................. Product Configuration................................................... 1-2 1-3 Section 2 2.1 2.2 Storage and Transportation..... 2-1 Precautions for Long-term Storage .............................. Repacking and Transportation .....................................
Section 7 7.1 7.2 7.3 7.4 7.5 7-6 Remote Controls ....................... 7-1 Device Message List by Function................................. Alphabetical Device Message List................................ Device Message List for each AWGN Internal Adder Functions when Selecting W-CDMA ............................ Alphabetical Device Message List for AWGN Internal Adder Function when Selecting W-CDMA ...... Device Message List for AWGN Internal Adder Functions When Selecting 1xEVDO.....................
IV.
Section 1 Overview This section describes the product outline and manual configuration for the MU368060A AWGN Unit. 1.1 1.2 Product Outline........................................................... 1-2 Product Configuration ................................................
Section 1 Overview 1.1 Product Outline The MU368060A is an AWGN (Additive White Gaussian Noise) Unit mounted on the MG3681A Digital Modulation Signal Generator (hereafter, main frame). Mounting the MU368060A on the main frame enables noise signals to be generated for reception sensitivity test of CDMA 2000 modulation radio equipment.
1.2 Product Configuration 1.2 Product Configuration The standard configuration of the MU368060A is shown below. When unpacking, check that the listed products are provided. If a missing or damaged component is found, please contact Anritsu or its distributors.
Section 1 Overview 1-4.
Section 2 Storage and Transportation This section describes precautions on storage and transportation of MU368060A. 2.1 2.2 Precautions for Long-term Storage ............................ 2-2 Repacking and Transportation ...................................
Section 2 Storage and Transportation 2.
2.2 Repacking and Transportation 2.2 Repacking and Transportation Precautions on transportation of MU368060A are shown below. Repacking Use the original packing material (box), if available. If not available, follow the procedures shown below to repack the MU368060A. [1] Cover the MU368060A with a conductive vinyl. [2] Prepare a cardboard/wood/aluminum box large enough to store the MU368060A and the cushioning material to cover it. [3] Put the MU368060A into the box.
Section 2 Storage and Transportation 2-4.
Section 3 Operation Overview This section explains the basic screens when MU368060A is mounted on the main frame. 3.1 3.2 Setting the Parameters .............................................. 3-2 Power Accuracy for the Calculated Bandwidth ..........
Section 3 Operation Overview 3.1 Setting the Parameters When pears. is pressed, the key lamp lights and the Main screen apThis screen is for basic parameter settings on digital modulation. Digital Mod Details on the Main screen settings are described below. [1] I/Q Mod. When Digital Modulation is set to “On”, this unit outputs noise. When set to “Off”, it outputs CW signal. Setting item : Int, Ext, Off [2] System Sets the communication system.
3.1 Setting the Parameters [5] Calculated Level Calculates the calculated level internally based on the inputted calculated bandwidth. Displays the power ratio of the band specified in [4] to the total power for the RF output of the signal generator. [6] (Absolute) Displays the power in the calculated bandwidth.
Section 3 Operation Overview • Calculating the power for the calculated bandwidth The noise generator can be explained by the following three parameters. Noise Bandwidth: Sets the band for the noise to be generated. Bandwidth set here is for the flat part of the noise as shown in the figure below. Calculated Bandwidth: Normally, same as the channel bandwidth for the communication system to be measured.
3.1 Setting the Parameters Example: Suppose that the following parameters are set for this unit: Output Level Digital Mod System Noise Bandwidth Calculated Bandwidth : −10 dBm : On : Noise1 : 7.68 MHz : 3.84 MHz From Formula (1), Power within the calculated bandwidth = RF output level + Calculated level = −10 dBm + (−3.45 dB) = −13.45 dBm Therefore, the power within the calculated bandwidth for the RF output is –13.45 dBm. The power –13.45 dBm is displayed at “(Absolute)”.
Section 3 Operation Overview 3.2 Power Accuracy for the Calculated Bandwidth From Formula (1) in Section 3.1, accuracy for the power within the calculated bandwidth varies depending on the accuracy for the RF output level and the power calculation level. When the user does not perform calibration, accuracy is the added value of these two error elements. Accuracy of the power within the calculated bandwidth = RF output level error + Calculated level error .................(2) = (Level accuracy at CW ± 3.
Section 4 Sample Measurement This section explains sample measurement when MU368060A is mounted on the main frame. 4.1 Evaluation Measurement for the Receiver .................
Section 4 Sample Measurement 4.1 Evaluation Measurement for the Receiver The evaluation measurement procedure for the W-CDMA receiver is described below. Setup Wanted signal source MG3681A + MU368040A + MX368041A/B Function MG3681A Digital Modulation Signal Generator 250kHz -3GHz 3-6GHz (Option) Freq Level 3 000.000 000 00 MHz -123.
Section 5 Sample Calibration This section describes the calibration procedure for the output level when using the MU368060A AWGN Unit. This example uses a W-CDMA system. 5.1 Calibration of the Output Level................................... 5.1.1 Adjusting the output level for the signal generator ....................................... 5.1.2 Adjusting the level at the input connector terminal of the receiver ................. 5.1.3 Measuring the level of the outputted noise .... 5.1.
Section 5 Sample Calibration 5.1 Calibration of the Output Level 5.1.1 Adjusting the output level for the signal generator Calibration of the output level at the RF connector terminal for the signal generator is explained here. A sample power setting with a 7.68 MHz noise signal bandwidth and –20 dBm/3.84 MHz at the RF output connector terminal is shown below. (1) Set the following parameters for this unit. Digital Mod : On System : Noise1 Noise Bandwidth : 7.
5.1 Calibration of the Output Level In this calibration method, the output level accuracy of this unit can be ignored because the output level is directly measured by the power meter. Conversely, by changing the output level of this unit after calibration, its accuracy affects the level accuracy. The output level accuracy applies because the step accuracy (relative accuracy) of the output level is not specified for this unit.
Section 5 Sample Calibration (4) Set the output level for this unit so that the indication value of the power meter becomes the total power found in Step (2). This completes calibration to the –73 dBm/3.84 MHz noise level at the input connector terminal of the receiver. See Section 5.1.1 for level accuracy. When –69.
5.1 5.1.4 Calibration of the Output Level Calibration using the offset setting function of the RF output level Using the offset setting function of the RF output level of the MG3681A with “(Absolute)” display, the noise level can be easily calibrated, as described below. A sample on the same condition as that in Section 5.1.3 is shown below. (1) Set the MU368060A as in Section 5.1.3 (1). (2) Measure the total noise power using the power meter.
Section 5 Sample Calibration 5-6.
Section 6 AWGN Internal Adder Function This section explains the AWGN internal adder function available when MU368060A is mounted with both MU368040A and MX368041A/B. 6.1 6.2 6.3 6.4 6.5 Product Outline........................................................... 6-2 Operation When Selecting W-CDMA ......................... 6-3 6.2.1 Main screen ................................................... 6-3 6.2.2 Scrambling Code & Others Edit screens ....... 6-5 Function Details...................................
Section 6 AWGN Internal Adder Function 6.1 Product Outline The MU368060A is capable of outputting I/Q and RF signals added with W-CDMA uplink modulation wave and noise when mounted with both the MU368040A and the MX368041A/B. W-CDMA modulation wave and noise can be internally added in the following conditions: Simulation Link W-CDMA Phase Chip Rate Maximum Code Number Up Link 1 3.84 Mcps 1 to 6 Noise parameters that can be set at noise internal addition are shown below: Noise Bandwidth C/N Chip Rate x1.
6.2 Operation When Selecting W-CDMA 6.2 Operation When Selecting W-CDMA When W-CDMA is selected for System while setting Up Link for Simulation Link, setting items for the AWGN internal adder function appear in the Digital modulation setting screen for W-CDMA modulation. Items not specifically mentioned can be set in the same as for the MX368041A/B. Refer to the "MX368041A or MX368041B Operation Manual." 6.2.
Section 6 AWGN Internal Adder Function [6] Output Level Displays [(noise power for all bands)+(total power for multiplex channels of W-CDMA modulation wave)] [7] AWGN Sets the AWGN internal adder function On/Off. When set to Off, the MX368041A/B standards apply to all items. When set to On, the MU368060A, not the MX368041A/B, standards apply.
6.2 6.2.2 Operation When Selecting W-CDMA Scrambling Code & Others Edit screens [1] Noise Bandwidth Sets the noise bandwidth. Setting item: Chip Rate x 1.
Section 6 AWGN Internal Adder Function 6.3 Function Details Image diagram for the AWGN internal adder function is shown below: Carrier frequency Noise (AWGN) W-CDMA Modulation Wave 3.84 MHz 7.68 / 5.76 MHz Noise is added to the same carrier as the W-CDMA modulation wave and outputted as I/Q and RF signals. Setting and displayed values for the AWGN internal adder function are shown below: [1] C/N Is the ratio between noise power within 3.84 MHz bandwidth and WCDMA modulation wave power.
6.3 Function Details [3] Wanted Is the ratio between Output Level and W-CDMA modulation wave power. This value is correct without a warning message "Power Under 0 dB" displayed. W-CDMA modulation wave power = Output Level + Wanted [4] Noise Is the ratio between Output Level and noise power within 3.84 MHz bandwidth. This is not the ratio for power of all bands. The difference between this value and the display value for Wanted is the same as the setting value for C/N.
Section 6 AWGN Internal Adder Function 6.4 Operation When Selecting 1xEVDO When 1xEVDO is selected for System, additionally, Over sampling is 8 and 1xEVDO modulation wave of single carrier is set to Pattern, setting items of AWGN internal adder function appear in the Digital modulation setting screen for 1xEVDO modulation. Items not specially mentioned can be set in the same as for the MX368033A. Refer to the “MX368033A” operation manual. [1] AWGN Sets the AWGN internal adder function On/Off.
6.4 Operation When Selecting 1xEVDO [3] Wanted Displays power of 1xEVDO modulation wave. [4] Displays noise power within 1.23 MHz band. [5] Noise Bandwidth Sets noise bandwidth and selected in multiples of Calculated Bandwidth. When Tone is selected, the tone signal of the same power as selected for x4 is added, but not for AWGN. Two times offset of Chip Rate from carrier frequency is added to the frequency of tone signal.
Section 6 AWGN Internal Adder Function 6.5 Function Details When Selecting 1xEVDO Image diagram for the AWGN internal adder function is shown below: Carrier frequency Noise (AWGN) 1xEVDO Modulation Wave 1.23 MHz 1.23 MHz x4/x3/x2 Noise is added to the same carrier as the 1xEVDO modulation wave and outputted as I/Q and RF signal. Setting and displayed values for the AWGN internal adder function are shown below: [1] C/N Sets the ratio between noise power within 1.
6.5 Function Details When Selecting 1xEVDO [3] Noise Displays noise power within 1.23 MHz band. This is not power for all noise bands. The difference between this value and the display value for Wanted is the same as the setting vale for C/N. Note the following points for using the AWGN internal adder function. • When AWGN is set to On, the power for 1xEVDO modulation wave are set to match the setting value for RF Level.
Section 6 AWGN Internal Adder Function 6-12.
Section 7 Remote Controls This section provides the function list for the GPIB device messages and describes the messages in alphabetical order, when the MU368060A AWGN Unit is mounted on the main frame. For a description of the other remote controls, refer to Section 6 "Remote Controls" in the "MG3681A Main Unit Operation Manual." 7.1 7.2 7.3 7.4 7.5 7.6 Device Message List by Function .............................. 7-2 Alphabetical Device Message List .............................
Section 7 Remote Controls 7.1 Device Message List by Function Command messages and query messages The header of the command message is a reserved word represented by uppercase alphanumeric characters. The header field of the query message ends with "?". The argument section of the command message and the query message can contain multiple arguments delimited by a separator ",".
7.1 Device Message List by Function Response message A response message is returned to the external controller when a query message is received, which is represented in the form "response header field + response data section". Multiple response data may be included by delimiting the response data section by a separator ",".
Section 7 Remote Controls Device message list Item Controlled item Device message Command message Query message Response message I/Q Source Internal MODE INT IQSRC INT MODE? IQSRC? MODE INT IQSRC INT I/Q Source External MODE EXT IQSRC EXT MODE? IQSRC? MODE EXT IQSRC EXT I/Q Source OFF MODE OFF IQSRC OFF MODE? IQSRC? MODE OFF IQSRC OFF System NOISE1 SYS NOISE1 SYS? SYS NOISE1 Item Controlled item Command message Query message NOISEBW bandwidth CALCBW bandwid
7.2 Alphabetical Device Message List 7.2 Alphabetical Device Message List Message header Detailed header name FREQ Frequency Function Sets the frequency. Command message FREQ f A space is required between the command message and f. Input value Value of f –2.99975 to 3 GHZ Input value explanation : –2.99975 to 3 GHz –2999.75 to 3000 MHZ : –2999.75 to 3000 MHz –2999750 to 3000000 KHZ : –2999750 to 3000000 kHz –2999750000.00 to 3000000000 HZ : –2999750000.
C CALCBW Calculation Bandwidth Function Sets the calculated bandwidth. The possible setting range is 10 to 80% of the noise bandwidth. Command message CALCBW f Query message CALCBW? Response message CALCBW f Value of f Within the range of 10 to 80% of the noise bandwidth. Application example CALCBW 3.84MHZ CALCALVL Calculation Absolute Level Function Reads power in the calculated band. Available for query command only.
C CALCLVL Calculation Bandwidth Level Function Reads the bandwidth calculation level. Available for query command only.
I IQSRC I/Q Source Function Selects between internal generation or external input for the I/Q signal. Command message IQSRC a Value of a INT : Internal (Internal I/Q signal) EXT : External (External I/Q signal) OFF : I/Q modulation stops (Only Pules modulation is available.
M MODE I/Q Source Function Selects between internal generation or external input for the I/Q signal. Command message MODE a Value of a INT : Internal (Internal I/Q signal) EXT : External (External I/Q signal) OFF : I/Q modulation stops (Only pulse modulation is available.
N NOISEBW Noise Bandwidth Function Sets the noise bandwidth. Command message NOISEBW f Value of f 1.5 to 16 MHz Query message NOISEBW? Response message NOISEBW f Restriction When Ext is set for I/Q signal source, screen display and remote control are disabled.
S SYS Noise System Function Sets the communication system.
Section 7 Remote Controls 7.3 Device Message List for AWGN Internal Adder Functions When Selecting W-CDMA This section provides the functional list of GPIB device messages when using the AWGN internal adder function with W-CDMA selected as explained in Section 6. Refer to Section 7.1 for details on command, query and response messages. Item Control Item AWGN Addition ON AWGN Addition OFF C/N Wanted Signal Power Noise Signal Power Noise Bandwidth Chip Rate x1.
7.4 Alphabetical Device Message List for the AWGN Internal Adder Function 7.4 Alphabetical Device Message List for AWGN Internal Adder Functions When Selecting W-CDMA This section details the alphabetical list of GPIB device messages when using the AWGN internal adder function with W-CDMA selected as explained in Section 6.
N NOISEADD AWGN Addition Function Sets internal addition of noise and W-CDMA modulation wave On/Off. Command message NOISEADD a Value of a ON : Sets the internal adder function On. OFF : Sets the internal adder function Off. Query message NOISEADD? Response message NOISEADD a Application example NOISEADD ON NOISEBW Noise Bandwidth Function Sets the noise bandwidth. Command message NOISEBW a Value of a CR1H : Sets the noise bandwidth to 1.5 times the Chip Rate.
P PWRCNR C/N Function Sets the ratio of modulation wave power to noise within bandwidth power (C/N). Command message PWRCNR l Value of l –30.0 to –8.0 dB Query message PWRCNR? Response message PWRCNR l Application example PWRCNR –8.0 dB PWRNS Noise Signal Power Function Queries the noise power ratio within the bandwidth. Query message PWRNS? Response message PWRNS l Value of l –143.0 to 17.
P PWRWS Wanted Signal Power Function Queries the modulation wave power ratio. Query message PWRWS? Response message PWRWS l Value of l –143.0 to 17.
7.5 Device Message List for AWGN Internal Adder Functions When Selecting 1xEVDO 7.5 Device Message List for AWGN Internal Adder Functions When Selecting 1xEVDO This section provides the function list of the GPIB device message when using AWGN internal function with 1xEVDO selected as explained in Section 6. Refer to Section 7.1 for details on command, query and response messages.
Section 7 Remote Controls 7.6 Alphabetical Device Message List for AWGN Internal Adder Function When Selecting 1xEVDO This section details the alphabetical device message for GPIB device message when using AWGN internal adder function with 1xEVDO selected as explained in Section 6. Refer to an example in Section 7.2 regarding this format.
N NOISE AWGN Addition Function Sets AWGN and 1xEVDO modulation wave internal adder On/Off. Command message NOISE a Value of a ON : Sets the internal adder function On. OFF : Sets the internal adder function Off. Query message NOISE? Response message NOISE a Application example NOISE ON NOISEBW Noise Bandwidth Function Sets AWGN bandwidth. Command message NOISEBW a Value of a X4 : Sets the noise bandwidth to 4 times the chip Rate.
N NOISECN C/N Function Sets the ratio between modulation wave power and noise power within band (C/N). Command message NOISECN l Value of 1 –30.0 to +30.0 dB Query message NOISECN? Response message NOISECN l Application example NOISECN –8.0DB NOISEPWR Noise Signal Power Function Queries noise power within band. Query message NOISEPWR? Response message NOISEPWR l Value of 1 –143.0 to +17.
W WNTSGPWR Wanted Signal Power Function Queries the modulation power Query message WNTSGPWR? Response message WNTSGPWR l Value of 1 –143.0 to +17.
Section 7 Remote Controls 7-22.
Section 8 Performance Test This section explains the required measuring instruments and procedures for setup, calibration and performance test to confirm that the MU368060A satisfies the standards. 8.1 8.2 8.3 8.4 Performance Test....................................................... Devices used in Performance Test ............................ RF Output Level Accuracy ......................................... In-band Power Calculation Accuracy .........................
Section 8 Performance Test 8.1 Performance Test The performance test is required to check that the MU368060A satisfies the standards. Conduct the performance test when required such as on acceptance inspection, periodic inspection or after repair. If the performance test result shows that the MU368060A does not satisfy the standards, please contact Anritsu's service division.
8.2 Devices used in Performance Test 8.
Section 8 Performance Test 8.3 RF Output Level Accuracy (1) Test criteria ALC On, output: –3 dBm, level difference from results during CW and during modulation at noise bandwidth of 7.68 MHz: ±3 dB (excluding when noise internal adder function is On.) (2) Measuring instruments for test • Power meter .........ML4803A • Power sensor ........
8.4 In-band Power Calculation Accuracy 8.4 In-band Power Calculation Accuracy (1) Test criteria Power ratio accuracy within the calculated bandwidth to total power (when RF output level is –3 dBm) ±0.6 dB (1920 to 2170 MHz, noise band width set value: 4 to 8 MHz) ±2.0 dB (1920 to 2170 MHz, noise band width set value: 8 to 16 MHz) (excluding when the noise internal adder function is On.) (2) Measuring instruments for test • Spectrum analyzer (with RMS detection mode)......
Section 8 Performance Test Reference Level : 10 dBm Amplitude Scale : 10 dBm [7] Perform waveform averaging with the spectrum analyzer. [8] Measure the power for calculated bandwidth by using the noise measurement function of the spectrum analyzer. [9] Measure the power for all bands by using the noise measurement function of the spectrum analyzer. [10] Calculate the calculated level from the values measured in Step [3] and [4].
Appendix Appendix A Specifications .................................................A-1 Appendix B Initial Value List ..............................................B-1 Appendix C Performance Test Result Sheet .....................
Appendix App-2.
Appendix A Specifications Item Application Carrier frequency range Noise data Probability distribution Bandwidth Crest factor Calculated bandwidth In-band Power calculation accuracy C/N setting range RF output Output level signal setting range Level accuracy Specifications Noise (AWGN) signal source for reception sensitivity test of CDMA modulation radio equipment. 1920 to 2170 MHz Gauss distribution 1.5 to 16 MHz (excluding when the AWGN internal adder function is On.
Appendix A Specifications A-2.
Appendix B Initial Value List B Initial Value List When Noise is selected for System Setting Initial value Noise Calculated 7.68 MHz 3.84 MHz When the AWGN internal adder function is On with W-CDMA selected Setting Initial value AWGN C/N Noise Bandwidth Off –20.0 dB Chip Rate x2 When the AWGN internal adder function is On with 1xEVD selected Setting Initial value AWGN C/N Noise Bandwidth Off –30.
Appendix B Initial Value List B-2.
Appendix C Performance Test Result Sheet C Performance Test Result Sheet Test site : Model Report No. Date Person in charge MG3681A Digital Modulation Signal Generator + MU368060A AWGN Unit Serial No. Power source frequency Ambient temperature Relative humidity Hz °C % Remarks: Output level accuracy (Section 8.3) Output level : –3 dBm Measurement uncertainty : ±0.2 dB Frequency Result Maximum Specification Value 1920 MHz 1970 MHz 2020 MHz Level accuracy at CW: ±3.
Appendix C Performance Test Result Sheet C-2.
Index [Alphabetical Order] C Calculated Bandwidth .........................................3-2, 3-3, 3-4, 3-5, 3-6, 5-2, 5-3, 5-4 Calculated Level ...................................................3-3, 3-4, 3-5, 3-6, 5-2, 5-3, 5-4, 5-5 C/N.........................................................................6-4 N Noise Bandwidth ..................................................3-2, 3-3, 3-4, 3-5, 3-6, 5-2 5-3, 5-4 P Power within the calculated bandwidth .............
Index Index-2.