Manual

PAG E 1 2 I N S TR U C T I ON M AN UAL T X 3 42 0
2. Briefly press the F key followed by the QUIET key.
‘QUIET’ will disappear from the display and all channels
that were tagged for quiet operation will now operate
normally again.
Receiving Signals in QUIET Mode
• If a normal signal is received on a QUIET channel, the
channel will appear busy (the ‘BUSY’ indicator will be
visible) but no sound will be heard from the speaker.
This means you will not be disturbed by the signal.
• If a normal signal is received on an open channel (one
that is not tagged with ‘Q’) the signal will be heard in
the usual way.
• If a signal containing your Selcall Ident is received
on any channel (Open or QUIET) QUIET mode will be
cancelled and the alarm will beep to alert you to the
call. In addition, the caller’s Ident or ALPHA name will
be displayed. All channels will now be open for normal
transmission and reception.
If you wish to respond to the calling radio using Selcall,
press and hold the CALL key for 1.5 seconds until the radio
beeps. The callers Ident will be transmitted back to them
causing the alarm in their radio to be activated.
To cancel the alarm on your radio
Briefly press the PTT key.
To return your radio to the QUIET mode
Briefly press the F key followed by the QUIET key. ‘QUIET’
will re-appear on the display.
SCANNING IN QUIET MODE
The TX3420 will allow you to scan while QUIET mode is
active. Using this feature you can monitor a group of quiet
channels or a combination of Quiet and Open channels.
To Scan in QUIET Mode:
1. Pre-select the Scan mode.
2. Select the channels you wish to scan and store them in
the Scan memory.
3. From those channels, select the ones you wish to remain
quiet and tag each one for QUIET operation.
4. Select a tagged channel and activate QUIET Mode
(press the F key followed by the QUIET key).
5. Press the SCAN key. The radio will begin scanning
and ‘SCAN’ and ‘QUIET’ will be displayed, indicating
the radio is scanning in QUIET mode.
Receiving Signals while scanning in QUIET Mode
• If a normal signal is received on an open channel,
scanning will pause while the channel is busy and will
resume scanning 5 seconds after the channel becomes
clear. (If you were scanning in Group Scan mode, the
radio may switch between the Open channel and the
Priority Channel - this is normal).
• If a normal signal is received on a Quiet channel but your
Selcall Ident is not detected, the signal will be ignored
and scanning will continue.
• If a signal containing your Selcall Ident is received on
any channel (Open or Quiet) both Scanning and QUIET
modes will be cancelled and the receiver will stay on
that channel. In addition, the alarm will beep to alert
you to the call and the caller’s Ident or ALPHA name will
be displayed. The channel will now be open for normal
transmission and reception.
TIP: To ensure reliable Selcall detection when scanning in
the QUIET mode, it is recommended that you restrict the
number of channels in the Scan group to 4 or less.
GROUP cAllING
The TX3420’s Selcall system includes a Group Call function
which allows you to call up to 1000 radios simultaneously.
This can be useful in an emergency situation where you may
need to transmit a message to a large number of radios in
your group.
By default, your radio is factory-set to allow up to 10 radios
to be called at once. If your application requires more,
you can arrange for your retailer to re-program this option
to allow 100 or 1000 radios to be called. The following
description assumes the default Group Call setting of
10 radios.
The Group Call function works by allowing you to enter a
special ‘group code’ into the last digit position of the Selcall
Ident you are sending. The ‘group code’ appears as ‘A’ when
displayed in the radio. When this ‘group code’ is received, it
substitutes for all other numbers in the last digit position.
As long as the first 4 digits of the Selcall you are sending
match those of the radios you are calling, their Selcall alarm
will be activated as if their full 5 digit Selcall Idents had
been received.
To achieve this, the 10 radios you are calling must be
programmed with sequentially numbered Selcall Idents.
e.g. 12330, 12331, 12332, 12333 . . --> , 12339
• Transmitting the Selcall Ident 12331 will only activate the
alarm in the radio with the Selcall Ident of 12331.