R&S FSP Series Service 电路图.pdf

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1、1164.4556.82-01- 1 Test and Measurement Division Service Manual Instrument SPECTRUM ANALYZER R -5 dBm; -10 dBm; -15 dBm; -20 dBm; -25 dBm Measurement:Set marker to peak: - MKR ? : PEAK Checking Frequency Response Test equipment:- N cable (refer to Measurement Equipment, item 14) Frequencyup to 3 GHz

2、 Maximum attenuation 0.2 dB Test setup:Connect tracking generator output to RF input of the FSP. FSP settings:- PRESET - NETWORK - BW : RES BW MANUAL : 1 kHz - AMPT : RF ATTEN MANUAL : 10 dB - AMPT : 0 dBm - BW : RES BW MANUAL : 1 kHz - SWT : MANUAL : 2 s Range 1: - FREQ : START : 9 kHz - FREQ : STO

3、P : 100 kHz Range 2: - FREQ : START : 100 kHz - FREQ : STOP : 1 MHz Range 3: - FREQ : START : 1 MHz - FREQ : STOP : 2 GHz Range 4: - FREQ : START : 2 GHz - FREQ : STOP : 3 GHz - NETWORK : SOURCE POWER level Values for level : 0 dBm; -10 dBm; -20 dBm Performance TestFSP 1166.4556.821.22E-1 Measuremen

4、t:Set marker to peak: - MKR ? : PEAK Set marker to minimum value: - MKR ? : MIN PEAK Checking Modulation Checking I/Q Modulation Test equipment:- ADS (refer to Measurement Equipment, item 16) - Spectrum Analyzer (refer to Measurement Equipment, item 15) - 2 Voltmeters (refer to Measurement Equipment

5、, item 17) - 2 BNC T pieces Test setup:? Apply the I and Q outputs of ADS to the I and Q inputs of the analyzer. Check the ADS voltages in parallel via T pieces. ? Connect spectrum analyzer to the TG output. ADS settings:? Set DC voltage (offset) to 0 mV 3 mV AC voltage: V(pp) = 1 V 10 mV Frequency:

6、 200 kHz Phase (I/Q) = 90 degrees Spectrum analyzer settings:- FREQUENCY : 1 GHz - SPAN : 1 MHz - REF : REF LEVEL : 0 dBm FSP settings:- FREQUENCY : 1 GHz - SPAN : 0 MHz - REF : REF LEVEL : 0 dBm - NETWORK : SOURCE POWER 0 dBm - MODULATION EXT I/Q Measurement of residual carrier: ? Switch off I and

7、Q channels on ADS. Voltmeter display: DC voltage 3 mV AC voltage 12 dB Test setup:? Connect RF outputs of the signal generators via 10 dB attenuators to the inputs of the 3 dB coupler. ? Connect output of the 3 dB coupler to RF input of the FSP. Signal generator settings (both generators): - Frequen

8、cy: generator 1fg1 = fin 50 kHz generator 2fg2 = fin + 50 kHz Refer to Performance Test Report table for values of fin. ? Adjust the output level of signal generators for an input level at the FSP of -20 dBm. FSP settings:- PRESET - AMPT : RF ATTEN MANUAL : 0 dB - AMPT : NEXT : ELEC ATTEN MANUAL : 0

9、 dB - AMPT : -10 dBm - SPAN : 500 kHz - BW : RES BW MANUAL : 3 kHz - FREQ : CENTER : fin Refer to Performance Test Report table for values of fin. Measurement:? MKR FCTN : TOI Evaluation:The third order intercept point (T.O.I) referenced to the input signal is displayed in the marker field by the re

10、ading TOI. FSPPerformance Test 1166.4556.821.33E-1 Checking RF Attenuator (with Option B25) Test equipment:- Signal generator (refer to Measurement Equipment, item 3) Frequency128 MHz Maximum level 10 dBm - Step attenuator (refer to Measurement Equipment, item 11) Frequency128 MHz Attenuation0 to 80

11、 dB in 5 dB steps Attenuation accuracy 0.1 dB Test setup: ? Connect RF output of the signal generator to RF input of the step attenuator. ? Connect RF output of the step attenuator to RF input of the FSP. Signal generator settings:- Frequency128 MHz - Level10 dBm Step attenuator settings:Attenuation

12、70 dB FSP settings:- PRESET - FREQ : CENTER : 128 MHz - SPAN : 500 Hz - BW : RES BW MANUAL : 1 kHz - TRACE : DETECTOR : RMS - BW : VIDEO BW MANUAL : 100 Hz - AMPT : RF ATTEN MANUAL : 10 dB - AMPT : -35 dBm Reference measurement: ? Set marker to peak of signal: - MKR ? : PEAK ? Set reference to peak

13、of signal: - MKR : REFERENCE FIXED Measurement Step attenuator settings:Attenuation 80 dB - aFSP Refer to table below for values of aATT. FSP settings:- AMPT : RF ATTEN MANUAL : aFSP - AMPT : -45 dBm + aFSP dBm - MKR ? : PEAK Refer to table below for values of a FSP , a ATT and reference level. Eval

14、uation:The difference between the level of the input signal of the FSP and the reference (at 10 dB RF-Attenuation) is displayed in the marker field by the reading Delta T1 FXD. aATT in dB8075706560555045403530252015105 aFSP in dB051015202530354045505560657075 Ref. level in dBm -45-40-35-30-25-20-15-

15、10-5051015202530 Performance TestFSP 1166.4556.821.34E-1 Checking Electronic Attenuator Accuracy Test equipment:- Signal generator (refer to Measurement Equipment, item 3) Frequency128 MHz Maximum level 0 dBm - Step attenuator (refer to Measurement Equipment, item 11) Frequency128 MHz Attenuation0 t

16、o 40 dB in 5 dB steps Attenuation accuracy 0.1 dB Test setup:? Connect RF output of the signal generator to RF input of the step attenuator. ? Connect RF output of the step attenuator to RF input of the FSP. Signal generator settings:- Frequency128 MHz - Level0 dBm Step attenuator settings:Attenuati

17、on40 dB FSP settings:- PRESET - FREQ : CENTER : 128 MHz - SPAN : 500 Hz - BW : RES BW MANUAL : 1 kHz - TRACE : DETECTOR : RMS - BW : VIDEO BW MANUAL : 100 Hz - AMPT : RF ATTEN MANUAL : 10 dB - AMPT : - 30 dBm Reference measurement:? Set marker to peak of signal: - MKR ? : PEAK ? Set reference to pea

18、k of signal: - MKR : REFERENCE FIXED Measurement Step attenuator settings:Attenuation 40 dB - aFSP Refer to table below for values of aATT. FSP settings:- AMPT : NEXT : ELEC ATTEN MANUAL : aFSP - AMPT : -30 dBm + aFSP dBm - MKR ? : PEAK Refer to table below for values of a FSP , a ATT and reference

19、level. Evaluation:The difference between the level of the input signal of the FSP and the reference (at 10 dB RF-Attenuation) is displayed in the marker field by the reading Delta T1 FXD. aATT40 dB35 dB20 dB25 dB20 dB15 dB10 dB aFSP0 dB5 dB10 dB15 dB20 dB25 dB30 dB Reference level-30 dBm-25 dBm-20 d

20、Bm-15 dBm-10 dBm-5 dBm0 dBm FSPPerformance Test Report 1166.4556.821.35E-1 Performance Test Report FSP Table 1-1Performance Test Report ROHDE FSP7.3.42 Replacing 7/8 GHz YIG Unit A161; FSP7 .3.43 Replacing Diplexer (30 GHz) A230; FSP13/30 .3.47 Contents - RepairFSP 1164.4556.82I-3.2E-1 Replacing 13/

21、30 GHz YIG Unit A161; FSP13/30 .3.48 Replacing RF Extension 13/30 A162; FSP13/30 .3.51 Replacing Diplexer A163; FSP40.3.53 Replacing 40 GHz YIG Unit A161; FSP40 .3.54 Replacing RF Extension 40 A162; FSP40 .3.56 Replacing AF Demodulator A190 (Option FSP-B3) .3.57 Replacing the OCXO A200 (Option FSP-B

22、4).3.58 Replacing Trigger A230 (Option FSP-B6) .3.59 Replacing the Tracking Generator A170 (Option FSP-B9).3.60 Replacing the External Generator Control A210 (Option FSP-B10).3.61 Replacing Wideband Calibrator A190 (Option FSP-B15).3.61 Replacing the LAN Adapter (Option FSP-B16).3.63 Replacing the E

23、lectronic Attenuator A50 (Option FSP-B25) .3.64 Replacing the DC/DC Converter (Option FSP-B30).3.65 Replacing the Battery Charger Module (Option FSP-B31/32).3.66 Replacing the Batteries (Option FSP-B31/32).3.67 Troubleshooting .3.68 Measuring Equipment and Accessories.3.68 Troubleshooting Start-up P

24、roblems.3.69 Troubleshooting Problems with Boot Process.3.70 Troubleshooting - Loading Module EEPROMs.3.76 Troubleshooting via Selftest .3.78 Troubleshooting Frontend 1 .3.90 Troubleshooting MW Converter .3.91 FSPContents - Repair 1164.4556.82I-3.3E-1 Figures Fig. 3-1Block diagram.3.1 Fig. 3-2RF-to-

25、IF conversion for frequencies 3 GHz.3.4 Fig. 3-4IF filter.3.5 Fig. 3-5Reference frequency.3.6 Fig. 3-6Processing of measured data.3.7 Fig. 3-7Removing the front module controller.3.17 Fig. 3-8Installing a new front module controller - position of connectors.3.18 Fig. 3-9Position of lithium battery a

26、nd jumper 12 on the front module controller.3.20 Fig. 3-10Position of connectors on front module controller.3.25 Fig. 3-11 Position of connectors on front module controller.3.27 Fig. 3-12Pin assignments of PROBE POWER connector.3.37 Tables Table 3-1Overview - module replacement.3.14 Contents - Repai

27、rFSP 1164.4556.82I-3.4E-1 This page is left blank intentionally. FSPInstrument Design and Function Description 1164.4556.823.1E-1 3 Repair This chapter describes the design of the FSP, simple measures for repair and troubleshooting and, in particular, the replacement of modules. For troubleshooting

28、and diagnostics, a selftest is available for polling diagnostic voltages of the modules and detecting limit violations. The firmware update and the installation of options are described in chapter 4 of this service manual. Instrument Design and Function Description A detailed schematic of the FSP de

29、sign is presented in the block diagrams below and in the attachments (see also chapter 5). The following functional description of the instrument refers to the block diagram. Block Diagram See also the drawings in chapter 5 for a detailed block circuit. Option OCXO FrontendDetector FMR5 + Display Fr

30、equency reference IF 20,4 MHz 0 to 70 dB 10-dB-steps RF- Input Cal.- Signal 128MHz, -30dBm IF 20,4 MHz / VIDEO Converter RF-ATT Option el. ATT+ Preamp 1.LO IF 404,4 MHz 1.LO Option B3 AF-Demod. 128 MHz 10 MHz 32 MHz 128 MHz 9 kHz to 3 GHz Option Tracking Generator TG Output 9k.3GHz 128 MHz IF-Filter

31、 Ext.Ref. In 10 MHz Ext.Ref. Out 10 MHz 10 MHz IF 20,4 MHz Out Option B10 2. IEC Diplexer YIG- Filter Analog IF (100 kHz.10 MHz) MW-Converter Power Supply TG I-Input TG Q-Input Option B4 OCXO Option B6 Trigger ZF 40.4 MHz Fig. 3-1Block diagram Instrument Design and Function DescriptionFSP 1164.4556.

32、823.2E-1 Description of Block Diagram The FSP is a triple-conversion superjet receiver (double-conversion for receive frequencies 3 GHz) for the frequency range from 9 kHz to several GHz, depending on the instrument model. The signals are processed by one RF board (two for models 3 GHz), one IF boar

33、d, one signal detection board and a controller comprising a Pentium-driven commercially available PC, an I/O interface and a graphics controller. The instrument can be upgraded to meet future requirements by retrofitting options in the analog and digital sections. The input signal is reduced in leve

34、l by the attenuator and routed to the RF modules depending on the instrument type. In instruments with option FSP-B25 (electronic attenuator), this module follows in the signal path. In 3 GHz models, it directly follows the RF frontend; in the high-frequency models, a diplexer is connected in betwee

35、n. The high-frequency signal component 3 GHz is routed to the microwave converter module following the diplexer. The IF module is the same in all instrument models, and likewise for the signal path through signal detection to the display. The internal reference and calibration signals are generated

36、in the frequency and level reference part on the IF filter board. Here the 128 MHz reference frequency from the frontend is amplified and made available to the instrument as a reference frequency, and a level-controlled output signal is generated as an internal level reference for instrument calibra

37、tion. The tracking generator produces an output signal at the receive frequency with a frequency offset of 150 MHz. The output level of the module is regulated and can be set in the range -30 dBm to 0 dBm. The output signal can be externally I/Q-, AM- and FM-modulated. A detailed description of the

38、modules is provided in the following. Attenuator The RF signal passes from the input connector via the input switch to the input attenuator, which can be set from 0 to 70 dB in steps of 10 dB. The input signal is applied to the switch as well as a 128 MHz signal which has a close tolerance level of

39、-30 dBm for calibration purposes or 0 dBm for the selftest of the instrument. Electronic Attenuator (Option FSP-B25) The electronic attenuator is fitted in the RF signal path directly behind the input attenuator. It consists of three different parts: an 5 dB attenuator, which changes the input atten

40、uation to 5 dB steps; an electronic attenuator, which can be switched from 0 to 30 dB in steps of 5 dB; and a switchable preamplifier to reduce the noise figure of the instrument. FSPInstrument Design and Function Description 1164.4556.823.3E-1 RF to IF Conversion for Frequencies 3 GHz Frontend The fro