Rohde & Schwarz GB4000V, User Manual

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R&S GB4000V Audio Unit
User Manual 6174.7514.02 - 02 47
3.11.2.3
Operation in the VoIP Mode
After the settings required for VoIP mode have been made, the R&S GB4000V audio
unit starts when voltage is applied to the connector X8 (see chapter
“2.4”
) in VoIP
mode . The audio unit is ready for operation as soon as the GO LED on the front panel
of the R&S GB4000V lights up. The LEDs on the front panel indicate the status of the
VoIP connection. A more detailed description of the LEDs can be found in chapter
“3.3”
. The R&S GB4000V can be operated after a suitable headset has been
connected to it. Details about the pin assignment of the headset can be found in
Appendix
“A Technical Information”.
The two LEDs PTT and SQL indicate the status of
the connected radio. Illumination of the PTT LED means that audio signal being sent to
the connected radio. This occurs as soon as the PTT button of the microphone is
pressed. Illumination of the
SQL LED means that the radio is receiving audio signals.
In this case, the signals received at the antenna of the radio exceed the SQL level set
there and the radio sends the audio data to the R&S GB4000V via the Ethernet. This
data is output on the headset/speaker by the R&S GB4000V.
The internal speaker is not muted while PTT of the headsets or the microphone is
keyed if the audio sidetone is routed back to the internal loudspeaker. Please take care
to avoid acoustic feedback in that case.