User Guide

RH-17
Troubleshooting — RF CCS Technical Documentation
Page 30 Nokia Corporation Confidential Issue 1 04/2003
PChange the TX_RF_AGC PDM to +511. Leave the TX_IF_AGC at 0 and the PA_AGC at
+218. Measure the output power. Subtract this power from the power measured in (d)
above. This is the RF_AGC gain delta.
Leave the PA_AGC and TX_RF_AGC values as is, then enter the values listed below for
the TX_IF_AGC. Measure the output power, then add to each the RF_AGC gain delta cal-
culated above. Check that these sums are within the listed ranges.
Troubleshooting:
Check Robin (N601) and supporting components. Also check D400, which generates the
PDM signals. Check AGC PDM voltages according to Table 1. Troubleshoot the rest of the
transmitter chain if necessary as described in Table 2.
Test 45 TN TX IF 11 dBm Set CELL Po
Description:
See previous tuning. This is the part of the previous tuning when the TX IF AGC is
adjusted so that the output power is +11 dBm
Explanation of Result:
The result is a power in dBm. A perfect result would be +11.00 dBm.
Manual Verification:
See previous tuning.
Troubleshooting:
See previous tuning
PDM for TX IF AGC
Range for output power, in
dBm
(a) +388 decimal -27.5 - 13.5
(b) +228 -8.0 - 6.0
(c) 163 6.5 - 20.5
(d) 0 6.5 - 20.5
PDM for TX IF AGC
Range for sum:[output power
+ RF_AGC gain delta], in
dBm
-150 29.0 - 42.0
-300 37.0 - 51.0