R&S M3SR 4100 Series, Руководство по эксплуатации, Страница: 259 / 706

Operating Manual 6175.4760.02 – 01 3.143
M3SR Series 4100 Switching the Automatic Gain Control On or Off
3.7.2.8 Switching the Automatic Gain Control On or Off
Softkey Softkey Type Description
Toggle 1. Press softkey 'RF/IF Gain' to toggle AGC
on/off.
Possible values:
• AGC
• MGC (= AGC Off)
Default value:
AGC
AGC and MGC setting is dependent on the se-
lected modulation mode. It is available for all
modulation modes, except F3E and F1D.
AGC ensures an almost constant peak audio
level even if the reception level varies. Be-
cause of that, it is recommended to use AGC
for all practical applications of the radio. Use
together with AGC threshold to set the maxi-
mum RF gain, if needed for more quiet voice
communication.
In practical applications it is recommended to
use AGC together with AGC threshold instead
of MGC. If switched to MGC, the softkey 'MGC
Intercept' is used to adjust the RF and IF gain
of the receiver.