R&S 4200 Series - Page 177

Troubleshooting R&S XU 4200
4.11 6166.5368.02.01
Code Message Level Config Note Action
0323 PA POWER LOW
–3 DB
W N Output power
decreases by 3 dB.
Check temperature (see
chapter 3.4.7.4.4)
Check VSWR (see
chapter 3.4.7.4.1)
Check DC voltage (see
chapt
er 3.4.7.4.3).
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 the radio to service.
0325 PA POWER
REDUCED DC
W – Output power was
reduced due to DC
voltage warning on the
PA board.
Check supply voltage
(see chapter 3.4.7.4.3).
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 warning on
the PA board.
This behavior 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.