R&S SMB Troubleshooting
1407.0806.82 3.27 E-6
Input and Output Signals
Connector,
system
Signal name Setting on signal
generator
Frequency Level Signal flow
X212, SMA RF out RF on 9 kHz to 6 GHz -145 dBm to
+ 30 dBm
to N RF connector at front
X215, SMP LFGEN LF out on 0.01 Hz to 1 MHz 0 V to 3 V to LF out at front
X214, SMP MOD EXT AM/FM/PM Source
Ext
0.0 to 1 MHz -1 V to +1 V From Mod ext at front
X213, SMP REF200 200 MHz 4+-2 dBm Output for testing purposes
Error Messages Concerning the RF Board Module
Error message Error correction
“ALC unlocked”
Automatic Level Control ALC exceeds upper bound.
Set attenuator mode “Auto”.
"Synthesis main-loop PLL unlocked"
Execute Internal Adjustment "Adjust Synthesis".
If the error message does not disappear change the
module.
"Synthesis adjustment failed"
Execute Internal Adjustment "Adjust Synthesis".
If error messages does not disappear, check the
diagnosis (see
Troubleshooting with Internal
Selftest
). If the diagnosis measurements work
change the RF Board.
"Synthesis adjustment data invalid"
Execute Internal Adjustment "Adjust Synthesis".
If the error messages does not disappear, check the
diagnosis (see
Troubleshooting with Internal
Selftest
). If the diagnosis measurements work
change the RF Board.
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