Operating Manual 6175.4760.02 – 01 3.139
M3SR Series 4100 Changing the RSSI Squelch Sensitivity
3.7.2.4 Changing the RSSI Squelch Sensitivity
Softkey Softkey Type Description
Editor 1. Press 'RSSI Thres' softkey.
2. Change to desired value.
Possible values:
0 dB up to 110 dB
Default value:
20 dB
The RSSI (received signal strength indication) 
squelch mutes the audio output for reception 
levels below the threshold.
Please note that RSSI squelch has to be en-
abled to have an effect on the audio output.
Superimposed over these manual settings is 
an automatic process (in case AGC function is 
switched on) which controls the preamplifier 
gain depending on received signal strength to 
prevent saturation of subsequent stages. The 
manual settings are limits up to which the au-
tomatic process controls, i.e. for low signals 
the attenuation /gain values apply; if the signal 
is above a threshold it is further attenuated.