I Setting Squelch Level; I Side Tone Function; I Lock Function; I Display Backlighting - Icom IC-A4 Instruction Manual

3
BASIC OPERATION

I Setting squelch level

The transceiver has a noise squelch circuit to mute undesired
noise while receiving no signal.
➥
To open the squelch:
Push and hold [SQL] to open the squelch. This is useful to
listen to weak signals that do not open the squelch.
- "BUSY" appears on the display.
➥
To close the squelch:
Release [SQL] to close the squelch.
D Setting the squelch level
q While pushing [SQL], push [Y] or [Z] to select the squelch
level.
- 'Sq 1' is loose squelch and 'Sq 9' is tight squelch. (Initial
level is 3.)
- 'oPEn' indicates that the squelch circuit is turned off.
w Release [SQL] to return to regular operation.

I Side tone function

When using an optional headset, such as those from the
David Clark Co. via the OPC-752
transceiver outputs your transmitted voice to the headset for
monitoring. (p. 18)
6
the
HEAD SET ADAPTOR
,

I Lock function

The lock function prevents accidental channel changes and
accidental function access. [PTT] and [SQL] still function
while the lock function is in use.
➥Push [
] for 2 sec. to toggle the lock function ON and OFF.
" " appears when the
lock function is in use.

I Display backlighting

Display backlighting automatically turns on when a key is
pushed.

I Low battery indicator

Low battery indicator appears
when the battery power has de-
creased to a specified level.
MR
MR
SKIP