User Guide

CCS Technical Documentation Troubleshooting — RF
RH-17
Issue 1 04/2003 Nokia Corporation Confidential Page 27
Test 35 BB Cal BTEMP Gain
Description
Explanation of Result
Manual Verification
Troubleshooting
Test 36 Test TX Start up Amplitude Limits [5,20]
Description:
This test turns on the AMPS transmitter and checks for the presence of a TX signal with
an amplitude within a specified range. A wide range is allowed since the transmitter is
not tuned yet.
Explanation of Result:
Amplitude of TX signal.
Manual Verification:
Set the phone to local mode and turn on the AMPS transmitter set to channel 384. Set
the PDM values as listed in Table 1 for AMPS Power Level 5. Look for an output signal at
836.52 MHz with an amplitude within the limits. The frequency of the signal may not be
accurate since the VCTCXO has not been tuned yet.
Troubleshooting:
Check proper placement, rotation and soldering of the components in the TX chain.
Check for the presence of LO tones as listed in Table 2. Check for presence of a TX signal
at each point in the TX chain, probing according to Table 2.
Test 38 Test TX Start up Current Limits [300,600]
Description:
This test turns on the AMPS transmitter and measures current of the whole phone, which
can detect some assembly errors.
Explanation of Result:
Current in milliamps.
Manual Verification:
Set the phone to local mode and turn on the AMPS transmitter PL5. Set the PDM values