Panel Description - Icom IC-77 Instruction Manual

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E Front panel
@ POWER SWITCH [POWER] (p. 5)
Turns power ON and OFF.
POWER
Power ON
Power OFF:
@ ANTENNA TUNER SWITCH [TUNER] (p. 10)
When an optional AT-130 HF AUTOMATIC ANTEN-
NA TUNER is connected, starts tuning.
© HEADPHONE JACK [PHONES]
Connects headphones. When headphones are
connected, no receive audio comes from the
speaker.
Usable headphones
Headphones with 4 — 16 Q impedance can be
used.
@ MICROPHONE CONNECTOR [MIC] (p. 4)
Connects the supplied hand microphone.
Optional microphones
An optional SM-6, SM-8 or SM-20 DESKTOP MICRO-
PHONE can also be used.
PANEL DESCRIPTION
© SQUELCH CONTROL [SQL] (p. 8)
Adjusts the squelch threshold level.
Recommended position
AF-S SQL
[SQL]
J Deep
What is the squelch?
| The squelch mutes noise when no signal is received. |
@ AF GAIN CONTROL [AF] (p. 8)
Adjusts the audio output level from the speaker.
[AF]
Shallow \
AF- SQL
Decreases Increases
\ Max. audio output
@ NOISE BLANKER SWITCH [NB] (p. 8)
Turns the noise blanker ON and OFF.
Min. audio output /
What is the noise blanker?
The noise blanker reduces click noise generated by
vehicle ignition systems, etc.