Remember to stop the RF before sending new data.
Alternative steps
• Measure the wide range levels normally and write down the levels that are possible to measure.
• Click Finish.
• Click Options.
• Change the first wide range DAC value to 573 and change the number of tuning steps to 21.
• Change the spectrum analyzer reference level to –20 dBm and adjust the input attenuator to the lowest
value possible.
• In the "Wide Range" pane, click Tune and fill in the rest of values starting from the 19th level.
Tx band response calibration (WCDMA)
Context
Tx band response calibration is required to get compensation parameters for DSP algorithm in order for it to
handle frequency response variations (caused by SAW filter, PA and duplexer unidealities) in open loop power
control and maximum power limitation situations.
Steps
1.
From the "Operating mode" dropdown menu, set mode to "Local". NOTE! After tuning is done change
system mode back to Dual by choosing "Free" to Selected System Mode and click Write.'
2.
From the Tuning menu, choose WCDMA -> Tx Band Response Calibration.
3.
Setup the spectrum analyzer according to the following settings:
Frequency:
1950.3 MHz
Span:
100 MHz
Reference level offset:
Cable attenu adapter attenuation
Reference level:
30 dBm
Input attenuation:
Default
Resolution bandwidth:
more than 4.7 MHz (i.e. 5MHz)
Video bandwidth:
more than 4.7 MHz (i.e. 5MHz)
Trigger:
Free run
Markers:
1922.4 MHz, 1950.0 MHz and 1977.6 MHz
RM-42
RF Troubleshooting and Manual Tuning Guide
Nokia Customer Care
9241872 (Issue 1)
Company Confidential
Page 7–53
Copyright ©2005 Nokia. All Rights Reserved.
