Rohde & Schwarz SU 4200 - Page 110

R&S SU 4200 Troubleshooting
6125.0226.12.01 4.8
Code Message Level Config Note Action
0316 TX SYNTH UNLOCK E – Synthesizer unlocks.
Transmission is
blocked.
Send radio to service.
0317 PA TEMP WARNING W – Temperature on PA
board is over the
warning limit (80 °C).
Output power is
reduced step by step.
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.
0318 PA TEMP ERROR E – Temperature on PA
board is over the error
limits (95 °C).
Transmitter is switched
off.
Send radio to service.
0319 TX TEMP WARNING W – Temperature on TX
board is over the
warning limit (70 °C).
Output power is
reduced step by step.
This behaviour is
normal with continuous
operation and +55°C
ambient temperature.
Check airflow of fans
and ambient
temperature. Clear the
ventilation opening.
0320 TX TEMP ERROR E – Temperature on TX
board is over the error
limit (85 °C).
Send radio to service.
0321 PA NO OUTPUT
PWR
E – Output power is less
than 500 mW.
Send radio to service.
0322 PA POWER LOW
–-1 DB
W – Output power
decreases by 1 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.