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CCS Technical Documentation
TN TX DC Offset Carrier Suppression
(See TN TX DC Offset Reference Power) tuning section. This step reports the delta
between the reference at 836.52 + 20 kHz and the minimum carrier level at 836.52 MHz.
The result is a delta in dB between the reference at 836.52 MHz + 20 kHz and the mini-
mum carrier level at 836.52 MHz found by adjusting the DC offsets for I and Q individu-
ally. The delta should be at least 35 dB.
Manual Verification: Set up the phone as in the previous test, and record the reference
power of the offset tone. Measure the delta between the center and offset tones. If the
delta is 35 dB or greater, the phone passes. If less than 35 dB, vary the "I" DC offset on
the "Values" line in the RF Tuning dialog box, using the values listed below until the min-
imum carrier maximum delta is found. Leave Q at 0. On the "Values" line, enter "I,Q". The
appropriate values (in decimal) are:
If the minimum is 35 dB or greater, the phone passes. If the minimum is less than 35 dB,
then vary Q in the same manner as I, using the above values, holding I constant at the
minumum value determined above, until the delta is at least 35 dB.
Troubleshooting: Check N601 (Robin), D200 (UEM), and associated components.
TN TX IF AGC Cell Po (O) [or (1), (2), (3), or (4)]
The IF gain curve is characterized by varying the TX_IF_AGC and measuring the transmit
power. This is only done once (in cell CDMA mode) since the same circuitry is used for
both cell.
Issue 1 09/2002
Nokia Corporation
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-504
-448
-392
-336
-280
-224
-168
-112
-56
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Confidential
RH-10
Troubleshooting
Page 11
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Table of Contents
Troubleshooting
