Nokia RM-42 Service Manual

Also see for RM-42: Service manual

Contents

9. Check that RSSI level value is between the limits presented in this table. If not, try clicking the Tune buttonagain.Table 15 RSSI level valuesBand Min Max UnitGSM900 -115 -90 dBGSM1800 -115 -85 dBGSM1900 -115 -100 dB10. Make sure that the "Save to Phone" check box is checked and click Stop.Next actionRepeat steps 3 to 7 for GSM1800 and GSM1900.GSM transmitter tuningsTx IQ tuning (GSM)ContextThe Tx path branches to I and Q signals at RF I/Q modulator. Modulator and analog hardware located after itcause unequal amplitude and phase disturbance to I and Q signal paths. Tx IQ tuning tuning balances the I andQ branches.Tx IQ tuning must be performed on all GSM bands. GSM1900 uses the same values as GSM1800.Steps1. From the dropdown menus, set "Operating mode" to Local, "System mode" to GSM, and Band to GSM900.2. From the Tuning menu, choose GSM -> Tx IQ Tuning.3. Set Mode to Automatic and Edge to Off.4. Click Start.Wait until automatic tuning has finished and moved the sliders.Values are written to the phone memory automatically.RM-42RF Troubleshooting and Manual Tuning Guide Nokia Customer Care9241872 (Issue 1) Company Confidential Page 7–37Copyright ©2005 Nokia. All Rights Reserved.