Operating instructions

LOCAL OPERATION
3-87
Testing a radio pager
Radio pagers are self-contained units with no external antenna provision, therefore it is not
possible to make a direct RF connection between the Service Monitor and the pager. The Service
Monitor output can be taken from the BNC RF output connector using the telescopic antenna
accessory (Aeroflex part no. 54421/001) or similar, where suitable screening is available.
Alternatively, a TEM cell may be preferable.
To configure the Service Monitor to make operational tests to a radio pager proceed as follows:-
• Select the POCSAG option from the Rx TEST mode, TONES function.
• Set the RF generator frequency to match the pager system operating frequency. Press the [RF
Gen] key to highlight the GEN FREQ: legend on the display. Enter the required frequency
using the data input keys.
• Set the RF output level to a suitable value by pressing the [RF Gen] key followed by the
orange [LEVEL] key to highlight the GEN and LEVEL: legends on the display. Use the data
input keys to enter the RF level.
• Set the modulation level to match the specification of the system to which the pager is
assigned. Press the [Tone Level] key to highlight the
Tone Level: legend on the display.
Enter the required modulation level using the data input keys.
• Set the bit rate to match the specification of the system to which the pager is assigned. Press
the [Bit Rate] key to highlight the
Bit Rate: legend on the display. Enter the value of the
required bit rate as a frequency using the data input keys, terminated by [Hz].
• If the system requires the transmitted data to have an inverted format, press the [Invert] key to
make the legend beside the
Polarity: legend on the display read Inverted. The [invert] key
toggles the legend between
Inverted and Normal.
• Set the
RIC, (Radio Identification Code), to match that of the pager. Press the [RIC] key to
highlight the legend
RIC: 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
RIC 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. 3-28,
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.