GME TX3100DP User Manual
Page 8
PA G E 8
I N S T R U C T I O N M A N UA L
T X 3 1 0 0
SQUELCH CONTROL
Squelch control is used to eliminate the background noise when
there are no signals present. The TX3100 features a preset
Squelch system. The Squelch sensitivity has been factory set to
provide optimum performance in most environments, however
the sensitivity can be altered by the user if required to suit varying
environmental situations.
The Squelch can be opened or closed by pressing the
key.
When the Squelch is open, the receiver’s background noise can
be heard and
is displayed. When the Squelch is closed, the
receiver remains quiet when there are no signals present but an
incoming signal will override the squelch and be heard in
the speaker.
To open the Squelch
Briefly press the
key. A low beep will be heard. If there are
no signals present you will hear the receiver’s background noise.
To close the Squelch
Briefly press the
key again. A high beep will be heard and
the receiver will become quiet.
NOTE:
If an incoming signal is very weak and is close to the
minimum squelch level, it may become broken or ‘chopped’ by
the squelch action. To prevent this, simply open the Squelch to
allow the signal to be heard clearly. Alternatively you can reduce
the Squelch sensitivity as described below.
SQUELCH SENSITIVITY
The sensitivity of the Squelch to incoming signals can be set to
suit your operating environment. For example, excessively noisy
environments may cause the squelch to open on local noise. The
TX3100 has nine (9) preset Squelch sensitivity settings.
To adjust the preset Squelch sensitivity
Press and hold the
key while immediately pressing the
or keys. The
icon will flash and the preset squelch level
will be displayed as -1 to -9 . The minimum squelch level of -1
is the most sensitive and will allow the squelch to open on very
weak signals. Setting the squelch to the maximum setting of -9
will require very strong signals to open the squelch. The default
setting is -3 which generally provides reliable squelch operation
for most applications.
NOTE:
After pressing the
key you should begin pressing
the or keys immediately (within 2 seconds) otherwise the
‘Silent’ mode may be activated. See ENABLING CTCSS/DCS
ON A CHANNEL on page 9.
Setting the Squelch sensitivity