calling station and the reception code of the listening station have to match. In
our example the head office has to change its transmission code to reach every
participant in case of individual call. The same applies to the mobile stations if
they want to reach each other. If the communication is made with the help of the
head office all mobile stations need only the transmission code 1111.
Entry of the reception code :
Depress briefly the button
( 7 ) [ SET ]
so that the symbol “music note“ appears
in the display on the top right of the channel number. The receiver is now muted.
Depress the key
( 7 ) [ SET ]
again but hold it for 3 or 4 seconds until a second
receipt tone indicates that the radio is ready for data input. The display shows
now
[ 0000 ]
with a flashing first digit. Begin now entering within 3 - 4 seconds
the reception code with the keys
( 8 - 11 ) [ 1 - 4 ]
. With every new entry the
flashing digit moves one step further to the right. After entering the last digit the
inputs will be saved 3 - 4 seconds later automatically and the display will revert
to the normal mode. The same procedure applies when you overwrite previous
entries.
Entry of the transmission code :
Depress briefly the button
( 7 ) [ SET ]
so that the symbol “music note“ appears
in the display. Then depress the key
( 6 ) [ CALL ]
and hold it for 3 or 4 seconds
until a second receipt tone indicates the readiness for data input. The display
shows again
[ 0000 ]
with a flashing first digit. Begin now entering within 3 - 4
seconds the transmission code with the keys
( 8 - 11 ) [ 1 - 4 ]
. With every new
entry the flashing digit moves one step further to the right. After entering the last
digit the inputs will be saved 3 - 4 seconds later automatically and the display will
revert to the normal mode. The same procedure applies when you overwrite pre-
vious entries.
Radio operation with the DTMF selective call system :
To activate the DTMF selective call system depress briefly the button
( 7 )
[ SET ]
so that the symbol “music note“ appears in the display. This will mute the
receiver and make it ready to decode received selective tone calls on the actual
channel. In case of a previous sent out transmission code or recognition of a se-
lective tone call the receiver will be opened. The symbol “music note“ will remain
in the display instead. If you want to make it silent again you have to cancel the
DTMF function ( “music note“ disappears ) and to reactivate it again by pressing
the button
( 7 ) [ SET ]
two times.
A transmission of a selective tone call is only possible with the activated DTMF
function ( symbol “music note“ ) in the display. To start the transmission depress
the button
( 6 ) [ CALL ]
briefly. The radio will switch over to transmission mode
and starts sending out the transmission code. When the tone sequence is sent
out completely it will revert to not muted receiving mode. If the channel is clear
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