R&S M3SR 4100 Series, Руководство по эксплуатации

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Operating Manual 6175.4760.02 – 01 3.145
M3SR Series 4100 Changing the MGC Level
3.7.2.10 Changing the MGC Level
Softkey Softkey Type Description
Editor 1. Press softkey 'MGC Level'.
2. The MGC level can be modified by knob.
Default value:
-12 dBµV
Before setting the MGC level, switch RF/IF
GAIN to MGC. The MGC (Manual Gain Con-
trol) function is used to manually adjust the
gain of the receiver. By decreasing the gain of
the demodulated signal, also its noise level is
reduced.
In practical applications it is recommended to
use AGC together with AGC threshold instead
of MGC.
AGC and MGC setting is dependent on the se-
lected modulation mode. It is available for all
modulation modes, except F3E and F1D.
With an appropriate level setting and a high
volume the audio quality can be improved. Ef-
fects on the antenna input signal (e.g. fading)
will no longer be levelled out automatically.
MGC operation will only be necessary in case
of critical receive conditions.