GME TX6500S - Manual (Page 12)

1 2 I N S T R U C T I O N M A N UA L T X 6 5 0 0 S
SQUELCH
The Squelch is used to eliminate any annoying background noise when there are no signals present.
The TX6500S features a preset Squelch system. The Squelch level has been preset to provide optimum
performance in most situations but can be adjusted through the Menu.
The Squelch can be opened or closed with the Squelch key. When the Squelch is open the receiver’s
background noise can be heard, the Icon is displayed and the Indicator LED glows GREEN.
When the Squelch is closed, the radio remains quiet when there are no signals present but any
incoming signals will override the Squelch and be heard in the speaker.
To Open the Squelch
Briefly press the Squelch 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 Squelch 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. In this case, simply open the Squelch using the Squelch
key to allow the signal to be heard clearly.
Squelch settings
The Squelch setting adjusts the sensitivity of the Squelch to incoming signals. The level can be preset
to suit your operating environment. The TX6500S has nine preset Squelch sensitivity settings (SQL-1 to
SQL-9).
To adjust the Squelch settings:
1. Press and hold the key until the radio beeps. SQL-X will be displayed where ‘X’ is a value
from 1 to 9.
2. Press the or keys to select a suitable Squelch value.
SQL-1: minimum squelch
Allows the Squelch to open on very weak signals. Most suitable for quiet country or rural locations
where there are few weak unwanted signals and little locally generated interference.
SQL-9: maximum squelch
The Squelch will open only on very strong signals and weak signals will not be heard. Most suitable
for inner city applications where there is severe interference and strong local signals.
For normal operation, select SQL-3 as a starting point and increase or decrease as necessary to
minimise the effects of interference.
3. Press the PTT to exit the Menu.
SELECTING CHANNELS
To change channels, briefly press the key to step up one channel or the key to step
down one channel. Holding either or will cause the radio to step through the channels
automatically at a faster rate.
PRIORITY CHANNEL
The Priority channel feature allows you to store any channel as a priority channel that can be instantly
recalled at the press of a key. This can be used to provide instant access to your working channel, your
local repeater channel or any other favourite channel.
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