Nokia 6600 slide, Руководство по обслуживанию

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Min Max
Tx Freq Comp (the first and last
value)
-4 +4
17. To save the tuned values to the terminal, click Write.
18. Close the
Tx Band Response Calibration
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.
Steps
1. From the Operating mode drop-down menu, set mode to Local.
2. Choose Tuning
→ WCDMA → Tx LO Leakage .
3. Click Tune.
4. To end the tuning, click Close.
RM-414; RM-570
RF troubleshooting
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