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3
BASIC OPERATION
■ Lock function
This function electronically locks all keys, except [PTT],
[SQL•
MONI] and [H/L•LOCK] to prevent accidental channel
changes and function access.
• Push [H/L•
LOCK] for 1 sec. to turn the lock function ON and
OFF.
- Only [PTT], [H/L•LOCK] and [SQL•
MONI] are functional.
Appears while the
lock function is used.
■ Adjusting the squelch level
The IC-M21 has a squelch even though there is no control
knob for it. In order to receive signals properly, as well as for
scan to function, the squelch must be adjusted to a suitable
level.
q Push [SQL•
MONI], then adjust the squelch level with [Y]/[Z].
- “SQL” indicator and squelch level indicator appear.
- There are 11 squelch levels to choose from: 0 is completely
open; 10 is the maximum squelch level.
- When no keys are pushed for 5 sec., the transceiver returns to
normal condition.
w Push [SQL•
MONI] again to return to normal condition.
(Level 10: Max. squelch level)
Each dot indicates the squelch level
Appears durling squelch
level adjustment.