Operating instructions

OPERATING MANUAL 2945A
46882-311D 3-77
The POCSAG test facility within the Service Monitor generates a paging signal containing all
elements of a ‘live’ signal. This signal is transmitted using the RF generator output to feed a
suitable test rig or TEM cell.
The decoder test facility allows a POCSAG type encoded signal to be decoded and displayed.
To access the POCSAG test facility use the following key sequence:-
[Rx TEST], [Tones], [POCSAG].
The screen and menu shown in Fig. 3- 25, POCSAG radio pager test screen and menu, will be
displayed.
B2605
Fig. 3-25 POCSAG radio pager test screen and menu
The facilities offered by this Service Monitor for testing radio pagers are:-
• The RF generator of the Service Monitor can be set to any frequency within the specified
range of the Service Monitor. The default frequency is 153.125 MHz.
• The RF level can be set to any level within the normal operating level of the Service Monitor.
• The modulation level of the signal can be to any level within the normal operating level of
the Service Monitor. The default level is 1.5 kHz.
• The
Address and Alert warning type can be set to any of the four available. The alert
message generated by radio pagers can be selected from four formats. The selection is
controlled by two function bits within the transmitted address codeword. The Service
Monitor displays a representation of the audible alert message, shows the relevant function
bit combination, and describes the type of message that is transmitted after the particular
alert message. See Fig. 3-26, Alternative address/warning messages.
The Service Monitor has 7 different inbuilt messages which can be sent to the radio pager. These
messages are selected by repeated presses of the [Select Message] key. The selected message is
shown in a panel on the display with the legend
Mess 1
(or
Mess 2 etc.).
The bit rate of the transmitted test signal can be set by the user within the limits 400 Hz to
4.8 kHz. The default bit rate is the standard system bit rate of 512 Hz.
The generated data can be transmitted with normal or inverted polarity.
The radio identification code (
RIC) of the radio pager is set by the user. This is entered into the
Service Monitor as a seven digit decimal number corresponding to the 21 bit address code of the
radio pager. The number is unique to the radio pager and will have a maximum decimal
equivalent of 2097151.
Leading zero can be omitted from the entry of RIC to save time.