User Guide

RH-37

6(b) - RF Troubleshooting Instructions Nokia Customer Care

Page 24 Nokia Corporation Issue 1 07/04

EDGE

Ensure that GMSK is ok.

GSM1800 transmitter

General instructions for GSM1800 TX troubleshooting

Start the preparations as described in chapter “General instructions for TX troubleshoot-

ing”.

GMSK

Set operating mode to local mode.

Select Testing RF Controls

Wait until the RF Controls window pops up

Select Band GSM 1800

Active unit TX

Operation mode Burst

RX/TX Channel 700

TX Power Level 5

TX Data Type Random

Edge Off

Use Phoenix to select

TX_Data Type: All 1

EDGE: On

TX Power Level: 10

Ch37

Ensure Vbatt=3.6 V

Yes

Oscilloscope

C7702

IREF01

V ~ 1.77 Volt Check

C7711

Mode

V = 1.8 Volt No Baseband

VPCTRL_900

R7713

V= 2.7 V

Yes

Spectrum analyzer Check PA N7700

RF@Test-Jig No Check Power Loop

Pout

= +24.5 dBm, 897.4MHz

(TXC,Rfin 900, DET)

Yes

GSM900 TX