Instrument Construction and Function Description R&S ZVB
1145.1078.82 3.58 E-4
Troubleshooting with the Selftest
T
he 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 3-port and 4-port instruments)
Rm1 Reflectometer port1
Rm2 Reflectometer port2
Rm3 Reflectometer port3 (applies only to 3-port and 4-port-instruments)
Rm4 Reflectometer port4 (applies only to 4-port instruments)
INFO
Setup
Info
Hardware
Info
Selftest
Error
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