Nokia n80 User Manual

Also see for N 80: User guide User guide Software guide Supplementary guide User guide

Contents

Nokia n80 User Manual Manual pdf 228 page image

Synthesizer test pointsMeasure RF ASIC N7505 RF ASIC N7500 Expected ResultVCTXCO output voltage G7501 pin 3 G7500 pin 3 38.4MHz 800 mVppRFCLKEXT 38.4MHz 500 mVppVCTXCO AFC voltage C7507 C7505 1VMeasure RF ASIC N7505 RF ASIC N7500 Expected ResultVCO G7500 G7501 3526,4 MHzMeasure RF ASIC N7505 RF ASIC N7500 Expected ResultVCO supply voltage L7515 C7509 2.8VMeasure RF ASIC N7505 RF ASIC N7500 Expected ResultVCO control voltage C7516 C7510 1 to 3 VRF ASIC N7505 RF ASIC N7500C7516, C7511, R7501, R7511 C7510, C7512, R7503, R7504Receiver troubleshootingIntroduction to Rx troubleshootingRx can be tested by making a phone call or in the local mode. For the local mode testing, use Phoenix servicesoftware.The primary Rx troubleshooting parameter RSSI (Receiving Signal Strength Indicator). For GSM RSSImeasurement, see GSM Rx chain activation for manual measurements / GSM RSSI measurement(page 7–13), and for the same measurement in WCDMA, see WCDMA RSSI measurement (page 7–14).In GSM, the input signal can be either a real GSM signal or a CW (Continuous Wave) signal, which is 67.771kHz above the carrier frequency.In WCDMA, the input signal can be either a real WCDMA signal or a CW signal, which is 1 MHz above the carrierfrequency.For service tool usage instructions, refer to section Service Tools and Service Concepts.See also• WCDMA Rx chain activation for manual measurement (page 7–13)RM-91; RM-92Nokia Customer Care RF Troubleshooting and Manual Tuning GuidePage 7 –12 COMPANY CONFIDENTIAL Issue 1Copyright © 2006 Nokia. All rights reserved.