GME TX667 - Advanced Transmission and Squelch Features; Squelch Operation and Adjustment

TX667 Instruction Manual
21
Note: The PTT switch can also be used to transmit a Call Alarm melody. When
the Call Alarm melody is enabled (see Menu options for more details on Call Alarm
settings), pressing the PTT switch twice quickly will play the Call Alarm melody in
the speaker of other radios on the same channel to alert them to your call. During
this time the
TX677 Instrucon Manual
12 June 2018
© 2018 Standard Communicaons Pty Ltd trading as GME. All rights reserved.
19
50157
Content
Transming
To transmit:
1. Press and hold the PTT (Push-To-Talk) switch. The other radio you are talking to must be
set to the same channel.
2. Hold the radio approximately 5-8 cm from your mouth with the antenna vercal and
speak into the built-in microphone.
3. While the PTT switch is pressed, the LED indicator on the upper edge of the radio will
light red and the
icon will appear on the LCD.
4. When you have nished speaking, release the PTT switch to receive incoming signals (it is
not possible to transmit and receive at the same me). If no further signals are received,
the unit will revert to ‘Standby’ mode.
The PTT switch can also be used to transmit a Call Alarm Melody.
When the call alarm melody is enabled (see Menu opons for more details on
Call Alarm sengs), pressing the PTT switch twice quickly will play the call alarm melody in the
speaker of other radios on the same channel to alert them to your call. During this me the
icon is displayed and the LED indicator will light red for about 5 seconds. The call alarm can
only be sent once per minute.
Time-out Timer
The radio has a built-in me-out mer that automacally limits transmissions to a maximum of
3 minutes of connuous operaon. 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 me-out mer acvates, the radio will beep and ‘tot’ is displayed briey on
the LCD. Normal operaon will be restored once the PTT switch is released.
Selecng 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 acvity before
transming, parcularly if you have CTCSS/DCS enabled.
icon is displayed and the LED indicator will light red for about 5
seconds. The Call Alarm can only be sent once per minute.
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.
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).