Operating instructions
OPERATING MANUAL 2945A
46882-311D 3-79
• Set the RIC (Radio Identification Code), to match that of the pager. Press the [RIC] key to
highlight the legend
on the display and enter the required number using the data entry
keys, followed by [ENTER]. An attempt to enter a number which exceeds the range of the
system maximum will not be accepted and the previously displayed
will be retained.
The Service Monitor is now configured to produce a signal compatible with the radio pager.
With the radio pager powered up and located as mentioned above, press the [Call Pager] key.
The radio pager will respond.
To test the differing response options of the radio pager the user can select the combination of
function bits and the contents of the message transmitted.
The Function bits are changed by repeated presses of the [Alert/Type] key. See Fig. 3-25,
POCSAG radio pager test screen and menu, above.
The message content of the signal can be selected from 7 options by repeated presses of the
[Select Message] key. Message 1 contains no data and thus produces an alert only response from
the radio pager.
The parameters of the test signal can be varied within the limits mentioned in Facilities above, to
test the performance tolerances of the radio pager.
Decoding POCSAG type signals
The POCSAG DECODE option allows signals containing data formatted to the POCSAG
specification to be decoded and displayed.
Decoding of either numeric or alpha-numeric messages is selectable.
The decoder can be set to respond to and display:-
Only messages addressed to a specified RIC number.
Only messages containing the sequence 12345.
All messages.
To configure the Service Monitor to decode POCSAG signals proceed as follows:-
• If the signal is to be obtained by ’Off air’ monitoring, select Tx TEST mode or Dx TEST
mode and the BNC (antenna) input. Use a suitable antenna to receive the transmissions.
Set the transmitter frequency (Tx FREQ), of the Service Monitor receiver, to the frequency of
the transmission to be decoded.
• If the signal is obtained from a receiver output, select AF TEST and connect the receiver
output to the AF INPUT socket.
Select the POCSAG option from within the TONES function. If the POCSAG decode option
is not fitted, the
POCSAG ENCODE screen and menu will be displayed, and decoding is not
possible. If the POCSAG decode option is fitted the
POCSAG DECODE screen and menu
will be displayed.
• Set the RIC code, if messages to a specific ’RIC address’ only are to be decoded (see response
option selection, below).
•
Select the required decode format. The [Decode Format] key toggles the selection between
Numeric and Alpha-numeric.
Response options
Select the required response option. Repeated presses of the [Decode On] key will sequence
through the options of:-
• ALL to respond to, and display, the first incoming POCSAG format message.
• On RIC to respond to, and display, the first incoming POCSAG format message
which is addressed to the set RIC.