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Rohde & Schwarz Manuals
Test Equipment
802.2020.52
Service manual
Rohde & Schwarz 802.2020.52 Service Manual
Radiocommunication tester cmt
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Stabilization of the Output Voltages
Soft Start
Protection of the 5-V Output
Protection of the 12-V Output
Testing and Adjustment
Testing the Switch-On and Monitoring Logic
Starting-Up the Switching Regulator
Testing the Power Pack under Load
Start-Up with AC Supply Operation
Testing the Specification with the Power Pack Closed
Troubleshooting
Component Lists Circuit Diagrams Component Layout Diagrams
Testing and Adjustment
Adjusting the 100-Mhz Crystal Oscillator
Testing the Synchronization with an External
Lo-Mhz Reference Frequency
Adjusting the Reference Oscillator Option (OCXO)
Testing the VCXO Loop
Frequency Adjustment of the RF Oscillators
Testing the RF Loop
Testing the Spurious FM
Troubleshooting
DC Voltage Values
Signal Level
RF Level
Testing the Control Signals for the M Divider
Interfaces
Component Lists
Circuit Diagrams
Component Layout Diagrams
Service Manual for 2Nd AF Synthesizer Option CMT-B7
Function Description
Testing and Adjustment
Testing the Input Stage
Adjusting the Sinewave Generator
Testing the Reference Voltage
Testing the Level Attenuator
Testing the PILINT Output (Internal Pilot Tone Output)
Serv I Ce man Ual
Function Description
455-Khz if Section
Testing and Adjustment
Testing the Fixed Oscillator
Testing the if Section
Adjusting the Fixed Oscillator
Adjusting the Oscillator
Adjusting the Phase Control
Adjusting the if Section
Adjusting the Offset
Adjusting the Balance
Interfaces
Service Manual for Display/Keyboard Module
Function Description
Key Detection
Rotary Pulse Generator
Display Control "'''.,''G0
Led/Illumination Control
Loudspeaker Amplifier
Rotary Pulse Generator
Display Control
Led/Illumination Control
Loudspeaker Amplifier
Troubleshooting
Service Manual for RF Millivoltmeter Option Em-B8
Function Description
Testing and Adjustment
Testing the Reference Generator
Replacing the Diodes in the Probe
Replacing the Diodes in the 10-V and 100-V Insertion Units
Function Description
Output Frequency
VCXO Loop
RF Loop
Control and Diagnosis
Testing and Adjustment
Frequency Adjustment of RF Oscillators
Level Adjustment of RF Oscillators
Testing the RF Loop
Testing the Frequency Dividers
Testing the VCXO Loop
Troubleshooting
Frequencies at the Output of the N Divider
DC Voltage Values
Signal Levels
Control Signals for Octave Divider
Control Signals for the M Divider
Bit Pattern
Interfaces
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Table of Contents
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·\
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/
VOLUME 1
.
rVI
RADI C
TESTER
C
T
802.2020.
802.2020.54
u
I
&SCHWARZ
Measo\~i~\:~i
Instruments
and
Syst~s
Division
UNIC TIN
The service manual consists
2
volum es
Printed in the Federal
Republic of Germany
802.2020.52
22
Table of
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Table of Contents
163
Table of Contents
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Table of Contents
384
Table of Contents
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Table of Contents
507
Table of Contents
536
Table of Contents
Troubleshooting
Troubleshooting
84
Troubleshooting
172
Troubleshooting
432
Testing the VCXO Loop
544
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