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5. Basic Operation
CAUTION
MEMO
5
5-4 Adjusting Squelch Level
● What is "squelch"?
The Squelch function activates the speaker only when signals at a
specified level or higher are received. This makes it easier to catch
target signals by eliminating the noise which occurs when no signals are
received. When the squelch level is increased, the receiver can receive
strong signals, but cannot receive weak signals.
"To open the squelch" means to deactivate the squelch. "To close the
squelch" means the opposite. The strength of the signals required to
open the squelch is determined by the squelch setting level. This level is
adjustable because it varies in some degree depending on the location of
signal reception and receiving frequency.
The squelch can be adjusted within the range of 10 levels (0 to 9).
5-4-1 Operating procedure
● Adjusting the squelch for the main band
Press the main dial once and rotate it.
● Adjusting the squelch for the sub band
Press the sub dial once and rotate it.
Rotating the dial clockwise sets the squelch level higher; rotating the dial
counterclockwise sets the squelch level lower.
• To keep the squelch constantly open, set the squelch level to 0.
• While the squelch is open, scanning is disabled except for the periodic
scan. To enable scanning, adjust the squelch level until you cannot hear
any noise.
26
• When using earphones, be careful that the volume is not set too loud.
Start from a low level and gradually increase it while actually listening
to the sound.
When nothing is heard
• When the squelch is closed or the Mute function is activated, you will
hear nothing even if you increase the volume level. For details, refer
to the following sections "Adjusting Squelch Level" (P. 26) and "Mute
Function" (P. 27).
145.000
VFO
Main squelch 3
Sub squelch 3
433.000
VFO
B S
F M
F M
B S
F M
F M
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