Nokia 5140 Manuales De Servicio

Nokia Customer Care

Troubleshooting Instructions

                                Company confidential

NPL-4/5

Issue 1 05/04

Copyright © 2004 Nokia Corporation. All rights reserved.

Page 29

To switch the TX -GSM 1800/1900 path both signals VANT2 and VANT3 have to be acti-
vated. This increases the isolation from the TX-GSM 1800/1900 path to the RX-GSM 
1800 path and reduces the feed back of RF-power to the RF ASIC.

GSM850 chapture is valid only for the NPL-4 (US variant). Start the preparations as 
described in chapter General instruction for the transmitter troubleshooting.

Select operating mode to “local mode”:

Select->Testing->RF Controls

In the popped up window: 

Select->Band->GSM 850

-Active unit->TX

-Operation mode->Burst

-RX/TX Channel->190

-TX Power Level->10

-TX Data Type->Random

The Phoenix window should now look like this:

0

0

0

X

 

 

0

0

0

X

0

0

2.7

X

0

2.7

0

X

 

2.7

2.7

0

X