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Icom IC-E2820 - Board Layouts; Main Unit PCB Layouts

Icom IC-E2820
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BASIC OPERATION
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Squelch attenuator
The transceiver has an RF attenuator related to the squelch
level setting. Approx. 10 dB attenuation is obtained at maxi-
mum setting.
The squelch attenuator allows you to set the minimum signal
level needed to open the squelch. The attenuator function can
be deactivated in set mode.
Rotate [SQL] clockwise past the 13 o’clock position to ac-
tivate the squelch attenuator.
Attenuation level can be adjusted up to 10 dB (approx.) between
13 o’clock and fully clockwise position.
NOTE: The squelch attenuator functions even when the
monitor function is in use. Thus it is recommended to set
the [SQL] control between the 10 and 13 o'clock positions
when using the monitor function.
D Squelch attenuator setting
qPush [F•]to display the function guide.
wPush [MENU](V/MHz•SCAN)
(Right band’s) to enter MENU
screen.
eRotate [DIAL] to select “SET MODE,” then push
[MAIN•BAND] to enter set mode.
rRotate [DIAL] to select “AUTO ATT” then push
[MAIN•BAND].
tRotate [DIAL] to turn the squelch attenuator function ON
and OFF, then push [MAIN•BAND]
Select “OFF” to deactivate the squelch attenuator function.
yPush [BACK](V/MHz•SCAN) (Right band’s) twice to return to
frequency indication.
[F• ]
[MENU]
Squelch is
open.
Squelch
attenuator
Squelch
threshold
Shallow Deep
Noise squelch

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