Multitone RPR 563GS, Техническое руководство

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SIGNAL
AF
COUNTER
RPR 560
P654 ALIGNMENT JIG
SK301
GENERATOR
Tx TONE (13)
10dB
ATTENTUATOR
PSG10162-1
RPR 563GS/KGS
TM1187A Issue C Page 5 - 28
Figure 18: Sub Audio Tone Frequency Test Connections
Sub-Audio Tone Frequency
22. The procedure for adjusting the sub-audio tone frequency (tone squelch) is as follows:
a) Connect the test equipment to the P654 as shown in Figure 18.
b) Tune the RF signal generator to the receiver channel frequency at a level of -
20dBm, with no modulation.
c) Make the following connections to SK301 (Test Socket):
i) Pin 13 (Tx Tone) to AF frequency counter.
ii) Pin 4 to Pin 9 (SPEECH3V to B+)
iii) Pin 3 to Pin 10 (/BEC.EN to 0V)
d) Adjust RV302 to give the required sub-audio tone frequency (±0.5Hz).