User Guide

NSM–2
Service Software Instructions
PAMS Technical Documentation
Page 90
Issue 1 12/1999
 Nokia Mobile Phones Ltd.
Tuning Steps
1. RX Filter Calibration
BB–filter tuning is fully internal operation. External signal generators etc. are
not needed, only command for phone to execute filter calibration procedure.
2. RX Calibration (AGC + AFC)
Procedure
Follow the steps described in chapter ”Service Software Instructions” sec-
tion ”RX calibration... command”.
Software reports the following:
AFC init value
AFC slope
PSW slope
Gain step values
Limits for the reported values
If everything went well the reported values should approximately be the
following:
Parameter Low limit High limit
AFC init value –200 200
AFC slope 135 345
PSW slope For information
Gain step values EGSM (nominal) PCN (nominal)
0 37 28
1 47 38
2 57 48
3 62 53
4 72 63
5 82 73
6 92 83
7 102 93
8 112 103
Troubleshooting
If the calibration does not succeed the software normally reports ”Unable
to read data from phone” or ”Failed to set high reference” or ”Failed to set
low reference”.