User Guide

NHL-12
Nokia Customer Care 7 - RF Description & Troubleshooting
24 COMPANY CONFIDENTIAL Issue 2 10/2004
Copyright © 2004 Nokia. All Rights Reserved.
■ General instructions for Tx troubleshooting
For a description of the test setup, refer to the Service Software Section, Service Concept dia-
gram.
1. Connect a test jig to the computer with a DAU-9S cable or to a FPS-8 flash prom-
mer with an XCS-4 modular cable.
• Make sure that you have PKD-1 dongle connected to the computer’s parallel port.
2. Connect a DC power supply to module test jig with a PCS-1 cable.
3. Set the DC supply voltage to 4.2V and set the jumper connector on test jig to "by-
pass" position.
Attention: When repairing or tuning transmitter use an external DC supply with at
least 3A current capability.
4. Connect an RF cable to the module test jig’s (MJS-13) RF connector and to meas-
urement equipment or at least a 10dB attenuator, otherwise the PA may be dam-
aged.
Use a spectrum analyzer as measurement equipment.
Attention: Normally Spectrum analyzer maximum input power is +30dBm. It is rec-
ommended to use 10dB attenuator on the spectrum analyzer input to prevent any
damage.
5. Set the phone module to test jig and start Phoenix service software.
6. Initialize connection to the phone. (Use FBUS driver when using DAU-9S and
COMBOX driver when using FPS-8).
7. Select product from the menu: File -> Choose Product -> NHL-12.
8. From the toolbar, set operating mode to "Local".
9. Activate the RF Controls window from the menu: Testing -> RF Controls.
In the RF Controls window:
• Select band "GSM850" or "GSM 1800" or "GSM1900" (Default = "GSM850").
• Set Active unit to "Tx" (Default = "Rx").
• Set Operation mode to "Burst" (Default = "Burst").
• Set Tx data type to "Random" (Default = "All1").
• Set Rx/Tx channel to 190 on GSM850 band or 700 on GSM1800 band or 661 on
GSM1900 (Defaults).
• Set Tx PA mode to "Free" (Default).
• Set power level to 5 (Default = 19) on GSM850 or to 0 (Default = 15) on GSM1800
or GSM1900.