Wcdma Tx Agc Tuning - Nokia NHM-1 Series Software Instructions

NHM-1

WCDMA TX AGC Tuning

This alignment requires use of a vector signal analyser or spectrum analyser.
• Calibration is started from the Phoenix menu:
• Press "Start" .
• The program asks do you want to read PM values or use current values or
defaults. When running for the first time use defaults. Press "OK".
• Connect the analyser into the WCDMA RF test connector
• The phone will send a power ramp sequence at 1950Mhz at 7 different power
levels. The actual signal is at 1950.3MHz, since the transmitter is modulated with
a 300kHz IQ-sinewave.
• Set the analyser to 1950.3MHz 100kHz RBW, sweeptime 2.0 ms, video
triggering used with trace averaging. Set the ref. level first to +30 dBm,
then decrease it to get a more accurate reading when taking a measure-
ment. Read power levels for slots from ramp into TXA 1 table and press
Page 78
Tunings/WCDMA/TX AGC alignment
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CCS Technical Documentation
Issue 1 11/03