Multitone RPR 563GS, Техническое руководство

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SIGNAL
RPR 560
P654 ALIGNMENT JIG
SK301
GENERATOR
PSG10519-1
P645
ENCODER
IBM PC
OR COMPATIBLE
RPR 563GS/KGS
TM1187A Issue C Page 5 - 29
Figure 19: Receiver Sensitivity Test Circuit
Receiver Sensitivity Check
23. To determine receiver sensitivity, carry out the following procedure:
a) Connect the test equipment to the P654 as shown in Figure 19.
NOTES:
1. The distance between the personal computer and the P654 must not be less
than 2 metres.
2. Test results are dependent on a noise-free environment.
b) Tune the RF signal generator to the receiver channel frequency and adjust the
deviation level to ±4.5kHz. Adjust the carrier level to -85dBm.
c) Send test calls from the P645, increasing the RF signal generator output level, if
necessary, to obtain correctly received calls.
d) Reduce the RF carrier level in 1dB steps until the transceiver receives two calls (or
less) in five.
e) Increase the RF carrier level in 1dB steps until five consecutive calls are received.
An output level of -90dBm or better should be achieved.