Gsm1900 Transmitter; General Instructions For Gsm1900 Tx Troubleshooting - Nokia RH-37 Series Rf Troubleshooting Instructions

RH-37
6(b) - RF Troubleshooting Instructions
EDGE
Ensure that GMSK is ok.
Use Phoenix to select
TX_Data Type: All 1
EDGE: On
TX Power Level: 5
Ch700
Ensure Vbatt=3.6 V
Yes
Oscilloscope
C7702
C7711
VPCTRL_900
Yes
Spectrum analyzer
RF@Test-Jig
Pout
= +21.5 dBm, 1747.8
MHz
Yes
GSM 1800 TX
OK

GSM1900 transmitter

General instructions for GSM1900 TX troubleshooting

Start the preparations as described in chapter "General instructions for TX troubleshoot-
ing".
GMSK
Set operating mode to local mode.
Select
Wait until the RF Controls window pops up.
Select
Page 28
IREF_900
Mode
R7715
No Check Power Loop
(TXC, RFin 1800 1900,
Testing
Band
Active unit
Operation mode
RX/TX Channel
TX Power Level
TX Data Type
Edge
Nokia Corporation
V = 1.83 Volt
V = 1.8 Volt No
Vdc= 2.7 V
Check PA N7700
DET)
RF Controls
GSM 1900
TX
Burst
661
5
Random
Off
Nokia Customer Care
Check
Baseband
Issue 1 07/04