Rohde & Schwarz SU 4200 - Page 111

Troubleshooting R&S SU 4200
4.9 6125.0226.12.01
Code Message Level Config Note Action
0323 PA POWER LOW
–-3 DB
W N Output power
decreases by 3 dB.
Check temperature (see
chapter
3.4.7.4.3)
Check VSWR (see
chapter
3.4.7.4.1)
Check DC voltage (see
chapter
3.4.7.4.2).
See CBIT messages
0325 to 0328.
If this fails to eliminate
the fault, send radio to
service.
0324 PA POWER HIGH
+1 DB
E – Output power
increases by 1 dB.
Transmitter is switched
off.
Send radio to service.
0325 PA POWER
REDUCED DC
W – Output power was
reduced due to DC
voltage on PA board
warning.
Check supply voltage
(see chapter
3.4.7.4.2).
If this fails to eliminate
the fault, send radio to
service.
0326 PA PWR
REDUCED VSWR
W – Output power was
reduced due to VSWR
warning.
VSWR is above 2.
Switch off and check
antenna cabling. Switch
on the transmitter again
in order to check VSWR
(see chapter
3.4.7.4.1)
If this fails to eliminate
the fault, send radio to
service.
0327 PA PWR
REDUCED TEMP
W – Output power was
reduced due to
temperature of PA
board warning.
This behaviour is
normal with continuous
operation and +55 °C
ambient temperature.
Check airflow of fans
and ambient
temperature. Clear the
ventilation opening.
Check the antenna, and
measure VSWR (see
chapter
3.4.7.4.1). A
high VSWR may cause
a heavy power loss in
the transmitter.
0328 PWR REDUCED
PSU TEMP
W – Output power was
reduced due to
temperature of PSU
board warning.
This behaviour is
normal with extreme
ambient temperature,
115 V AC supply and
continuous
transmission.
Check airflow of fans
and ambient
temperature. Clear the
ventilation opening.
If this fails to eliminate
the fault, send radio to
service.