User Guide

PAMS
Technical Documentation
WinTesla User Guide
NHD–4
Page 55
Original 11/97
4.Monitor the TX signal with a spectrum analyzer set to the
following parameters:
Frequency 838.20 MHz
Span 10 kHz (smaller if feasible)
Amplitude 20 dBm
Peak Search ON
(Signal Track)
5. Adjust the AFC PDM until the signal is within 200 Hz of 838.20 MHz.
Troubleshooting
If this tuning fails there is most likely either a transmitter or synthesizer
failure. Consult both the Synthesizer and Transmitter Troubleshooting
Manual and Functional Descriptions for information and tests that can be
performed to determine the cause of the fault. If this tuning fails, and yet
the standard AFC Tuning has passed, then it is likely that there is a fault
with RX_SLOPE PDM.
AMPS TX Power Level Tuning Functionality Test
Manual Test
To manually verify this functionality of the phone, perform the AMPS TX
Power Level 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 1 MHz (smaller if feasible)
Amplitude 30 dBm
3. Adjust the TXI_REF PDM value until the signal falls into the appropriate
range of output power for the corresponding power level. The table below
details the tuning range for each power level.
AMPS Power Level Output Power Tuning Range
(dBm)
0–2 24 – 30
3 20 – 26
4 16 – 22
5 12 – 18
6 8 – 14
7 4 – 10