GME TX677 - Time-Out Timer; Selecting Channels

TX677 Instruction Manual
20
TIME-OUT TIMER
The radio has a built-in time-out timer that automatically limits transmissions to
a maximum of 3 minutes of continuous operation. This feature is required by the
ACMA to prevent accidental blocking of the frequency should your PTT switch
become jammed or be otherwise pressed accidentally. When the time-out timer
activates, the radio will beep and ‘tot’ is displayed briey on the LCD. Normal
operation will be restored once the PTT switch is released.
SELECTING CHANNELS
1. In the ‘Standby’ mode, press the  key to step up one channel or
the  key to step down one channel.
2. Press and hold the  or  keys to quickly scroll through the
channels.
SQUELCH
The Squelch is used to eliminate the background noise when there are no signals
present. When the squelch is open the receiver’s background noise can be heard.
When the squelch is closed the receiver remains quiet while there are no signals
present but any incoming signals will override the squelch and be heard in the
speaker.
To open the squelch:
Briey press the SQL key. This will allow you to check the current channel for
activity before transmitting, particularly if you have CTCSS/DCS enabled.
When the squelch is open, the LED indicator on the upper edge of the radio will
light green and
TX677 Instrucon Manual
12 June 2018
© 2018 Standard Communicaons Pty Ltd trading as GME. All rights reserved.
20
50157
Conte nt
When the squelch is open, the LED indicator on the upper edge of the radio will light green and the
and icons will appear on the display. During this me you will hear stac or hiss if the channel is
clear. Do not transmit if you hear any signals.
To close the squelch:
Briey press the SQL key again.
The squelch sensivity is preset in the Menu – Squelch Level seng (see Menu opons for more
details on seng the squelch sensivity).
Keypad Lock
The Keypad Lock disables the keys to prevent accidental key presses from changing the preferred
sengs of the radio. When the keys are locked, the icon is displayed and all key presses are
ignored except for the PTT switch, SQL and the Keypad unlock sequence.
To lock the keypad:
Press the F key (the F icon will appear) then hold the key. The
icon will appear on the display.
To cancel the keypad Lock:
Press the F key then hold the key unl the radio beeps. The icon will disappear.
Duplex Operaon
Duplex operaon allows the radio to transmit on a dierent frequency to that which it receives. This
allows operaon through repeater staons in your area. Repeaters automacally re-transmit your
signal over a much wider area, providing greatly increased range. The Duplex mode only works on
designated repeater channels 1 – 8 and 41 – 48. With Duplex selected on one of these channels,
your radio actually transmits 30 channels higher than it receives. For example, if Duplex is selected
on channel 1, your radio will receive on channel 1 but will transmit on channel 31.
Duplex can be enabled or disabled on individual channels. When Duplex is enabled on the selected
channel, is displayed.
The Duplex mode is set through the Menu. Please refer the menu opons in the Menu secon further in
this manual.
C HANN E L
31
C HANN E L
1
C HANN E L
1
C HANN E L
31
VE HIC LE
R E P E A T E R
O P E R A T ION
VE H I C L E
R E P E A T E R
S T AT ION
Figure 1 - Simple/Duplex Range Comparison
the and
TX677 Instrucon Manual
12 June 2018
© 2018 Standard Communicaons Pty Ltd trading as GME. All rights reserved.
20
50157
Conte nt
When the squelch is open, the LED indicator on the upper edge of the radio will light green and the
and icons will appear on the display. During this me you will hear stac or hiss if the channel is
clear. Do not transmit if you hear any signals.
To close the squelch:
Briey press the SQL key again.
The squelch sensivity is preset in the Menu – Squelch Level seng (see Menu opons for more
details on seng the squelch sensivity).
Keypad Lock
The Keypad Lock disables the keys to prevent accidental key presses from changing the preferred
sengs of the radio. When the keys are locked, the icon is displayed and all key presses are
ignored except for the PTT switch, SQL and the Keypad unlock sequence.
To lock the keypad:
Press the F key (the F icon will appear) then hold the key. The
icon will appear on the display.
To cancel the keypad Lock:
Press the F key then hold the key unl the radio beeps. The icon will disappear.
Duplex Operaon
Duplex operaon allows the radio to transmit on a dierent frequency to that which it receives. This
allows operaon through repeater staons in your area. Repeaters automacally re-transmit your
signal over a much wider area, providing greatly increased range. The Duplex mode only works on
designated repeater channels 1 – 8 and 41 – 48. With Duplex selected on one of these channels,
your radio actually transmits 30 channels higher than it receives. For example, if Duplex is selected
on channel 1, your radio will receive on channel 1 but will transmit on channel 31.
Duplex can be enabled or disabled on individual channels. When Duplex is enabled on the selected
channel, is displayed.
The Duplex mode is set through the Menu. Please refer the menu opons in the Menu secon further in
this manual.
C H ANNE L
31
C H ANNE L
1
C H ANNE L
1
C H ANNE L
31
VE H I C L E
R E P E A T E R
O P E R A T ION
VE H I C L E
R E P E A T E R
S T AT ION
Figure 1 - Simple/Duplex Range Comparison
icons will appear on the display. During this
time you will hear static or hiss if the channel is clear. Do not transmit if you hear
any signals.
To close the squelch:
Briey press the SQL key again.
Note: The squelch sensitivity is preset in the Menu – Squelch Level setting (see
Menu options for more details on setting the squelch sensitivity).