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R&S ZVB
Troubleshooting
1145.1078.82 3.47
E-1
Troubleshooting with the Selftest
The selftest is used to check supply voltages to the boards, including voltages generated on the boards
themselves.
On the frequency reference board, two clock signals (128 MHz and ADC-CLK) are also
measured.
Starting the selftest:
•
Select Service Level 2 (see Service Functions) – this means that the temperature sensor readings
are displayed and tighter voltage tolerances used.
•
Call the selftest in the INFO menu:
Start the selftest with the
Selftest
softkey.
The selftest results are displayed on the
screen.
In the selftest result-table, an abbreviation is used for every board designation:
Fr Frequency
reference
Nd1
Network controller1, digital section
Nd2
Network controller2, digital section (only 4-oort instruments)
Sy1/DDSCON Synthesizer1
Sy1/DDSCON
Synthesizer2(only 4-port instruments)
Rm1
Reflectometer
port1
Rm2
Reflectometer
port2
Rm3
Reflectometer port3 (applies only to 3-port and 4-port-instruments y)
Rm4
Reflectometer port4 (applies only to 4-port instruments)
INFO
Setup
Info
Hardware
Info
Selftest
Error
Log…
Del Error
Log
Summary of Contents for ZVB 4
Page 57: ...Instrument Construction and Function Description R S ZVB 1145 1078 82 I 3 2 E 1 ...
Page 133: ...1145 1078 82 5 5 E 1 Spare Parts List Mechanical Drawings ...
Page 142: ...1145 1078 82 5 15 E 1 Block Circuit Diagram ...
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Page 153: ...1145 1078 82 5 17 E 1 Circuit diagrams ...
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