27
on page 15).
The factory setting of the Tx4200 is to attach
the last 4 digits of your 5 digit Selcall Ident to
the end of your Selcall signal.
This is to ensure
100% compatibility with the large quantity of
TX4000 radios currently in service that are
designed to display only the last 4 digits of the
callers Ident. In the majority of cases, this is
perfectly suitable because almost all radios
transmit and receive Selcall signals with the
same first tone.
However, for those situations where you may
need to talk to or receive Selcall signals from
radios with a variety of first tone values, the
TX4200 can be programmed to append the full
5 digits of your Selcall Ident to your Selcall
signal. Then, when your signal is received by
another TX4200, your entire 5 digit Ident will
appear on their display.
Your TX4200 is able to identify whether the
incoming appended Ident contains 4 or 5 digits
and will automatically display it in the correct
sequence. If the Ident is a 4 digit type, the first
digit will be replaced with a dash ‘-’.
NOTE:
If you intend to communicate with
Tx4000 radios using Selcall, it is recommended
that you stick to using 4 digit appended Idents.
This is because the Tx4000 was not designed
to expect more than 4 appended digits. If 5
digits are sent, the Tx4000 will simply decode
the first 4 digits and wrongly display them. The
last digit will be lost.
i.e. If your TX4200 appended your Ident as:
12345
a TX4000 would display it as:
1234
when it should have been displayed as:
2345
SENDING AND RECEIVING GROUP
CALLS TO UP TO 100 RADIOS
The TX4200 is factory set to allow you to send
and receive Group Calls to up to 10 radios. If
there are more than 10 radios in your fleet and
you need to Group Call them, your dealer can
reprogramme your radio to send and/or receive
Group Calls to up to 100 radios. If required,
your dealer can also disable the Group Call
function completely or arrange to receive Group
Calls but not send them (or vice versa).
Warning:
Careless use of the Group Call option
can cause interference to other radios who are
not in your group but whose Selcall Ident falls
within your Group Call range.
The TX4200 makes Group Calls to up to 100
radios using the same method as for 10 radios
(see “Group Calls” on page 19), except that you
must programme an
‘A’
into
fourth
digit position
of the Selcall Ident
(instead of the fifth)
. When
this Group Call is received, the ‘A’ will substitute
for any digit in the fourth and fifth digit positions.
Example
Transmitting the Ident 12537 will only
activate the receiver which is programmed
with the Ident 12537
However, transmitting 125A- will activate all
receivers with Idents 12500 through 12599
(a total of 100 receivers).
To make use of the group call function, your
TX4200 fleet should have Selcall Idents which
are in sequence.
i.e. 12500, 12501... 12502 etc
If the receivers in your TX4200's do not have
sequential Selcall Idents and you need to make
use of the group call function you can arrange
for you dealer to re-programme your TX4200's
(see section on dealer programming options).
If your radio has been programmed to let you
make Group Calls to up to 100 radios, you can
call them as follows:
1. Briefly press the
CALL
button to enter the
‘CALL TO’ mode. The last used Ident will be
displayed and the last (fifth) digit will be
Summary of Contents for TX4200 Series
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