R&S 4200 Series, Operating Manual

Page: 52 / 220

R&S XU 4200 Function Test
6166.5368.02.01 2.10
2.7 Function Test
ATTENTION
The transceiver does not contain any parts the operator can repair. Only
properly qualified technicians are allowed to repair the radio. When
performing service procedures, follow the requirements of VDE 0701.
Function test\Function test "Name".doc
Function Test\\Function test Receiver.doc
Function test
of the receiver LED SQ lights up if an RF receive signal is present at the set channel
frequency on X8.
You can audio-monitor the AM-demodulated voice signal by using the built-
in loudspeaker. You can adjust the volume using the rotary knob. The
demodulated audio can also be heard in the headset at the same time, and
you can also control its volume.
If no RF receive signal is present, you may hear a noise signal depending
on how the SQ switch (SQ button) is set. In the default state with the factory
settings, the SQ muting function is deactivated and the noise signal is
present at the output.
After you press the LOC key, you can toggle the SQ key.
Function Test\\Function test Transmitter.doc
Function test
of the transmitter LED CARR lights up after you press the PTT key. The transmitter is active
and can be modulated via audio input X5.
LED MOD flashes or lights up in rhythm with the voice signal.
You can listen to the modulated voice signal via the loudspeaker and the
headset. You can adjust the volume of the two separately.
If PTT keying is not activated at X5, you can also operate and activate the
radio in LOCAL mode. After you press the LOC key, you can power up and
modulate the transmitter via the headset.
The TX PARAMETER menu provides test functions for activating the
transmitter via keyboard operation (see chapter 3.4.7.4.1).
Last Page of Chapter 2\\Last Page of Chapter 2 "Radio".doc