HF-90 Operation & Installation Guide
Next, press the numeric keys to select the appropriate Selcall
ID (four digits) of the station you wish to contact. As you
press each individual numeric key, the corresponding
number will appear on the display until all numbers have
been selected. At this point all numbers will appear on the
display together. For example:-
This display shows that Selcall ID 1234 has
been selected.
If in the process of selecting the Selcall ID you press an
incorrect number, you can clear the display by pressing and
releasing the PTT switch on the microphone.
Once the Selcall ID has been correctly selected, press the
STAR key again to send the Selcall. You will hear a
varying high pitched tone as the Selcall is being transmitted,
and your display will appear as follows:-
This display shows that Selcall is being sent -
ie. in transmit mode.
Several seconds after pressing the STAR key to send the
Selcall, you should hear a series of high pitched beeps. This
is your positive confirmation (known as the Selcall
Confirmation) being transmitted from the called station to
let you know that your Selcall has been received
successfully. If you do not hear the Selcall Confirmation
you should repeat the procedure outlined above, on the same
channel or a new channel. If your Selcall is not successful
this may be due to inappropriate frequency selection or
excessive interference (refer to Section 2.3 of this Guide).
In the event of strong interference, it may be necessary to
repeat Selcall up to three times.
30
Section 6.1
