Rohde & Schwarz XT 4410A - Page 211

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Operator’s Manual • Malfunction
6076.0822.12.01 – 4.13 –
0256 SY PLL UNLOCK E Synthesizer error:
PLL unlock
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
0257 SY FREQ CMD ERR W Synthesizer warning:
Incorrect frequency value
commanded
Inform depot.
270 HSELU FREQ CMD ERR W UHF filter warning:
Illegal frequency value
commanded
Inform depot.
271 HSELU NO OUTPOW E UHF filter error:
No output power. The error
message disappears after
the next faultless transmis-
sion.
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
272 HSELU NO INPOW E UHF filter error:
No input power. The error
message disappears after
the next faultless transmis-
sion.
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
273 HSELU VOLT ERR E UHF filter error:
Voltage error
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
274 HSELU DEFECT E UHF filter error:
UHF filter defective
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
0300 RX OVERTEMP W Receiver warning:
Overtemperature in module
CBIT message or frequent event:
Check airflow of fans and ambient
temperature. If this fails to eliminate
the fault, send radio to depot.
Single event:
Check airflow of fans and ambient
temperature.
0301 RX EXT REF NOT PRES E Receiver error:
External 100-kHz reference
frequency not present
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
0302 RX IF PART OVERLOAD E Receiver error:
IF part overload
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
0303 RX IN SIG OVERLOAD W Receiver warning:
Input signal overload
CBIT message or frequent event:
Receive signal too large. Switch off
and check RF cables. If this fails to
eliminate the fault, send radio to
depot.
Single event:
Receive signal too large. Switch off
and check RF cables.
0304 RX GEN ERR E Receiver error:
General error
CBIT message or frequent event:
Send radio to depot.
Single event:
no action
0305 RX WATCHDOG E Receiver error:
Reset of µP caused by
watchdog circuit
Send radio to depot.
Code Message Level Notes Action
(CBIT message,
frequent or single event)