R&S 4200 Series Operating Manual page 153

External Power Amplifiers
3.13.2.4 Limitations/Notes
Limitations Please note that there are certain limitations to radio operation if an external
power amplifier is connected:
 The main/standby function is not supported
 The USER_OUT output cannot be used for remote control of a user via
the management system (UO (user out) GB2PP code)
 The transmit signal at the antenna output of the radio is made available
with a delay of 20 ms relative to the PTT input signal
 CBIT event 0342 "User Contact Warning" cannot be used when the
"External Power Amplifier" is configured to "Jotron". CBIT events 0349
"EXT PA ALARM" and 0350 "PWR REDUCED TO LOW" are enabled
instead
Note: When the radio is switched off, the amplifier is still active and
consumes power.
Note: When the external power amplifier is active, only AM modulation
mode can be used.
Note: Make sure that the "TX Output Power Level Low" is set 6 dB lower
than "TX Output Power Level Normal" and RF Power of the radio is set to
"Normal" (see chapter 3.4.7.2).
3.101
R&S XU 4200
6166.5368.02.01