Automatic Gain Control (Agc); Preamplifier / Preamplifier (Pre/Att); Noise Suppressor Nb - XIEGU X5105 Instruction Manual

3.11 Automatic gain control (AGC)

By adjusting the proper recovery time parameters of the AGC automatic gain control
system, the receiver can achieve the optimum state effect.
Operation method:
A. Switch to the second page menu, press the corresponding multi-function button to
select the AGC function.
B. The AGC function will be selected in the following order:
AGC-
SLOW
AGC-
OFF
When you select "AGC-AUTO", the CW mode is actually "AGC-FAST", in voice mode is
"AGC-SLOW."
If AGC-OFF is selected, the AGC system is turned off and the display of the S table is
stopped.

3.12 Preamplifier / preamplifier (PRE/ATT)

Pre amplifier (PRE) and pre attenuator (ATT) can improve the receiver's listening effect.
When the signal is weak, the preamplifier can be switched on to increase the signal
strength. When the signal is strong, the preamplifier can be switched on to reduce the
signal strength.
Of course, you can also choose to turn off the circuit unit so that the signal will by pass.
Operation method:
A. Press the [PRE/ATT] button to start the function.
B. The switching sequence will follow the following loop:
PRE
OFF
In the low frequency waves (less than 10MHz) operation, the preamplifier can be closed,
then let signal in by-pass state, it will be more conducive to improve the receiving effect,
And it can avoid the blocking of receiver caused by strong interference signal. Typically,
when the S table is still changing, the preamplifier is not need to turned on.

3.13 Noise suppressor NB

Noise suppressor can effectively eliminate some specific pulse type interference,
especially the noise produced by the automobile ignition system, and can improve the
receiving effect obviously.
Operation method:
AGC- AGC-
FAST AUTO
ATT
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