GME TX3340 User Manual

Page 16

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i n s t r u c t i o n m A n uA l

t X 3 3 4 0

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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 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 tX3340’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

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transmitting the selcall ident 12331 will only activate the

alarm in the radio with the selcall ident of 12331.

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transmitting 1233A will activate the alarms in all radios

with idents 12330 through 12339 (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
can arrange for your retailer 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 the CALL button. ‘cAll to’ is displayed, along with

the last sent or received selcall ident.

2. Enter the required selcall ident as follows:
(a) Press the PRI key until the radio beeps. the right-hand

digit of the selcall ident will flash.

(b) Press the or keys to select ‘A’ in the flashing digit

position. this is the special code that will create the
Group call.

digit position.

(d) repeat steps (b) and (c) to enter the other 4 digits

as required. the last digit will be set to ‘A’.

once the ident has been entered you have 10 seconds to send
it otherwise the cAll to mode will be cancelled and the ident
you entered will be lost.

NOTE: Where your tX3340 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.

100 radios ident sent: 123AA idents called: 12300 -> 12399
1000 radios ident sent: 12AAA idents called: 12000 -> 12999