Video bandwidth:
more than 4.7 MHz (i.e. 5MHz)
Trigger:
Free run
Markers:
1922.4 MHz, 1950.0 MHz and 1977.6 MHz
4.
Click Start and OK.
5.
Adjust the "Mid Channel Power Level" to 21.0 dBm.
6.
Click Accept and OK.
7.
Read the marker power level on the low channel and fill it in to the “Low Power Level” line.
8.
Click Accept and OK.
9.
Read the marker power level on the high channel and fill it in to the “High Power Level” line.
10. Click Accept.
11. Check that the tuned values are within the limits presented in the following table. If they are OK, click Yes.
Min
Max
Tx Freq Comp (the first and last
value)
-4
+4
12. Close the tuning window.
Tx LO leakage (WCDMA)
Context
The purpose of Tx LO leakage tuning is to minimize the carrier leakage of the IQ-modulator which is caused by
the DC offset voltages in the Tx IQ-signal lines and in the actual IQ-modulator.
The tuning improves WCDMA Tx AGC dynamics at low power levels. A self-calibration routine selects the best
combination for internal control words in order to produce minimum LO leakage.
RM-36
Nokia Customer Care
RF Troubleshooting and Manual Tuning Guide
Page 7–56
Company Confidential
Issue 1
Copyright ©2005 Nokia. All Rights Reserved.
Summary of Contents for 6680 RM-36
Page 479: ...www s manuals com ...
