Operating Manual 6175.4760.02 – 01 3.153
M3SR Series 4100 Switching the VOX Signal Source
3.7.2.16 Switching the VOX Signal Source
Softkey Softkey Type Description
Listbox 1. Press 'VOX' softkey.
2. Select desired mode from listbox.
3. Press 'ENT' to confirm.
Possible values:
OFF - LINE - VOICE
In VOX (voice-operated transmission), the ra-
dio is keyed when a voice signal is present on 
the audio or line interface. VOX is only avail-
able in voice communication, i.e. in modulation 
modes +/-J3E, A3E, F3E and H3E.
If VOX is set to VOICE, the operator can 
switch to transmit mode by simply talking into 
the microphone connected at the front panel, 
and when he stops talking the radio automati-
cally returns to receive mode.
If VOX set to LINE, the transmit mode is acti-
vated as soon as a voice signal at the USB line 
input on X26 is detected.