Product Manual

PAGE 24 I NSTRUCTION MANUAL TX3510S/TX3520S/TX3540S
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 callers Ident or ALPHA label 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 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 Dealer 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 positions of the
SelCall Ident you are sending. The ‘group code’ appears as
an ‘A’ when displayed in the radio. When this ‘group code’ is
received, it substitutes for all other numbers in that 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. 14530, 14531, 14532, 14533 . . --> , 14539
• Transmitting the SelCall Ident 14531 will only activate the
alarm in the radio with the SelCall Ident of 14531.
• Transmitting 1453A will activate the alarms in all radios
with Idents 14530 through 14539 (a total of 10 radios).
If the radios in your fleet do not have sequentially numbered
SelCall Idents and you want to make use of this function, you
will need to re-program the SelCall Idents in your radios.
Programming and Sending Group Calls
The process for entering a Group call Ident is the same as
entering a normal SelCall Ident.
1. Press CALL. is displayed, along with the last sent or
received SelCall Ident. If an ALPHA label is displayed you
will need to press F then ALPHA to switch to Numeric
mode.
2. Press and hold the Channel control (or LVL key) until the
radio beeps. The right-hand digit of the SelCall Ident will
flash.
3. Rotate the Channel control (or press or ) to select
‘A’ in the flashing digit position. This is the special code
that will create the Group Call.
4. Briefly press the Channel control (or LVL key) again to
select the next digit position.
5. Continue entering the other 4 digits as required. The
SelCall number is now ready to send.
6. Press and hold CALL. A long beep will be heard and the
radio will transmit the SelCall Ident.
NOTE: Where your radio allows it, programming group calls
for 100 radios is identical except that you will need to select
‘A’ for the last two digits (e.g. 123AA). For 1000 radios you
will need to select ‘A’ for last three digits (e.g. 12AAA).
e.g.
Sending Ident 145AA will call 100 radios with Idents 14500
-> 14599