Ctcss; Overview; Monitor Function - GME GA9800 Instruction Manual

Storing Group Call Idents:
Group Call Idents can be stored in memory in the same way as a standard Selcall Ident.
Receiving Group calls:
Receiving a Group call is identical to receiving a normal Selcall except that the alarm sound is
a LOW tone beep instead of the normal HIGH tone beep. The Callers Ident or ALPHA Name
appears on the display in the usual way.

CTCSS

OVERVIEW

CTCSS (Continuous Tone Coded Squelch System) is a squelch quieting system that allows
several groups of users to share the same channel without disturbing each other. It uses one
of 50 preset sub-audible (very low frequency) tones to open and close the squelch on your
radio. The system applies a continuous low-level tone to your transmission and a matching
tone decoder to your receiver's squelch. With CTCSS enabled, the channel remains quiet to all
incoming signals unless they carry the correct tone. When a transmission with the correct tone
is received, the squelch opens and remains open for as long as the signal is present. When the
transmission ends, the channel becomes quiet again. Transmissions that do not use the correct
tone will not be heard.
The TX6200 allows CTCSS to be enabled or disabled on individual channels. In addition, the
CTCSS tone frequency is user programmable. Note that the CTCSS tone you select will be
used for all CTCSS enabled channels in your radio.

MONITOR FUNCTION

The monitor function temporarily opens your radio's squelch to allow you to listen for signals
from other CTCSS users outside your group. Because their CTCSS tone is different to yours,
your squelch would normally remain closed, preventing you from hearing them. By using
the Monitor switch, you can open the squelch and listen on the channel to check that it is
clear before transmitting. This will help prevent you from accidently transmitting over the
top of someone.
To use the Monitor Function, press the Monitor key. If no signals are present you will hear
the usual hiss of an empty channel. Press the Monitor key again to restore the Squelch to its
previous setting.
Page 28 User Instructions TX6200