User Guide

PAMS
Technical Documentation
WinTesla User Guide
NHD–4
Page 54
Original 11/97
AMPS Testing
AFC Tuning Functionality Test
Manual Test
To manually verify this functionality of the phone, complete the AFC tuning
procedure found in the Service Software, or perform the following steps:
1. Place the phone in AMPS Troubleshooting Mode
2. Monitor the TX signal with a spectrum analyzer set to the following
parameters:
Frequency 836.52 MHz
Span 10 kHz (smaller if feasible)
Amplitude 20 dBm
Peak Search ON
(Signal Track)
3. Adjust the AFC PDM until the signal is within 200 Hz of 836.52 MHz.
Troubleshooting
If this tuning fails there is most likely either a transmitter or synthesizer
failure. Consult both the Synthesizer and Transmitter Troubleshooting
sections of the Service Manual and Functional Descriptions for
information and tests that can be performed to determine the cause of the
fault.
AFC – Deaf Channel Tuning Functionality Test
Manual Test
To manually verify this functionality of the phone, complete the AFC –
Deaf Channel tuning procedure found in the Service Software, or perform
the following steps:
1. Place the phone in AMPS/Baseband test screen.
2. Turn on the AMPS TX to power level 7.
3. Set the channel to 440.