Icom IC-7800 Instruction Manual page 13

1
PANEL DESCRIPTION
■ Front panel (continued)
@7
!9
@0
@1
@2
@3
@4
@5
@6
!9 AGC CONTROL [AGC] (for MAIN band; p. 5-11)
@0 AGC CONTROL [AGC] (for SUB band; p. 5-11)
Adjusts the AGC circuit time constant.
• To use the set value, push appropriate band's [AGC VR]
([AGC VR] indicator lights).
Fast
@1 AGC VOLUME SWITCH [AGC VR]
(for MAIN band; p. 5-11)
@2 AGC VOLUME SWITCH [AGC VR]
(for SUB band; p. 5-11)
➥ Push to toggle [AGC] control usage ON and OFF.
• The set level with [AGC] control is used for the oper-
ation when switched ON.
• The [AGC VR] indicator above this switch lights
green when the control setting is in use.
➥ Turns the AGC function OFF when pushed for
1 sec.
@3 AF CONTROL [AF] (inner control; for SUB band)
@4 AF CONTROL [AF] (inner control; for MAIN band)
Varies the audio output level from the speaker.
Audio output
decreases
@8 @9 #0
Slow
Audio output
increases
1-4
#2 #3 #4
@5 RF GAIN CONTROL [RF] (outer control; for MAIN
band; p. 3-9)
@6 RF GAIN CONTROL [RF] (outer control; for SUB
band; p. 3-9)
Adjusts the RF gain level.
While rotating the RF gain control, noise may be
heard. This comes from the DSP unit and does
not indicate an equipment malfunction.
Sensitivity
decreases
@7 SQUELCH CONTROL [SQL] (outer control; for
MAIN band; p. 3-9)
@8 SQUELCH CONTROL [SQL] (outer control; for
SUB band; p. 3-9)
Adjusts the squelch threshold level. The squelch re-
moves noise output from the speaker (closed con-
dition) when no signal is received.
• The squelch is particularly effective for FM. It is also
available for other modes.
• 11 to 12 o'clock position is recommended for any set-
ting of the [SQL] control.
threshold
Deep
Shallow
#1
Sensitivity
increases
Noise squelch
Squelch
S-meter
Squelch
squelch
is open.
Shallow Deep