Edge; Gsm1900 Transmitter; General Instructions For Gsm1900 Tx Troubleshooting; Gmsk - Nokia NPL-4 Series Troubleshooting Instructions

NPL-4/5/RM-104
Troubleshooting Instructions

EDGE

Ensure that the GMSK is OK!
Use Phoenix to select
TX_Data Type: "1" or "0"
TX Power Level: 5
Ch700
Ensure Vbatt=3.9V
Yes
Oscilloscope
C742
C702
BOM1 VPCTRL_1800
BOM2 VPCTRL_1800
Yes
Spectrum analyzer
RF-connector
Pout
= +21 dBm, 1747.8 MHz
Yes
GSM 1800 TX
OK

GSM1900 transmitter

General instructions for GSM1900 TX troubleshooting

GMSK

Set the operating mode to "local mode".
Select->Testing->RF Controls
Wait until the RF Controls window is popped up
Select->Band->GSM 1900
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IREF_1800_
Vdc >
1900
Mode Vdc =
R713
R713
Check PA N700
No Check Power Loop
-Active unit->TX
-Operation mode->Burst
-RX/TX Channel->661
-TX Power Level->5
-TX Data Type->Random
0.5 Volt
2.78 Volt No
Vdc= 0 V
Vdc= 2.7 V
Nokia Customer Care
Check
Base Band
Issue 2 05/05