Pager Sensitivity Measurement (Coarse); Pager Sensitivity Measurement (Fine) - Multitone FLA 872 Technical Manual

TLA 852/FLA 872
5.8.3

Pager Sensitivity Measurement (Coarse)

To determine the pager sensitivity, configure the test equipment as shown in
Figure 5.13 and do the procedure given in sub-paragraphs a) through e).
NOTE: This is only an indication of sensitivity,which is dependent on the unit
under test being in a noise free environment.
P645
SIGNAL
GENERATOR
Figure 5.13: Configuration for Coarse Sensitivity Measurement
a) Set the signal generator to the channel frequency, at a deviation of 4.5kHz
and an output level of -85dBm.
b) Install a known good battery in the pager and switch it ON.
c) Put the pager in the P671A and send a sensitivity call from the P645.
Increase the signal generator output level, if necessary, to obtain a correctly
received call.
d) Reduce the RF level in 1dB steps until the pager receives less than three
calls in five.
e) Increase the RF level in 1dB steps until five consecutive calls are received.
An output level of -98dBm should be acheived.
5.8.4

Pager Sensitivity Measurement (Fine)

Configure the equipment as described in paragraph 5.8.3 but connect a P800 TEM
cell instead of the P671A. Follow the steps given in the TEM Cell Instructions for
the IEC method. Place the pager in the polystyrene block (refer to Figure 5.14)
positioned centrally in the TEM Cell, with the display facing the input end. A level
of -103dBm or better should be achieved.
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DATA
RF IN
PC
NOTE: THE DISTANCE BETWEEN THE
PC AND THE P671A MUST BE
GREATER THAN TWO METRES
10dB
ATTENUATOR
TAG11331-1
TM1205 Issue 2