Nokia RH-41 Series Troubleshooting Instructions page 24

RH-41
Troubleshooting Instructions
TDMA800
Since the same physical signal path is used for both analog and digital modes at the
lower band, there is no need for additional troubleshooting in the digital mode. So if the
digital mode at the lower band is not working properly, start the analog mode trouble-
shooting.
TDMA1900 (dual band)
Only EXT RF connector -> 1st IF needs separate troubleshooting at upper band. After
down conversion (RF -> 135.54 MHz) both lower and upper band use same signal path.
Apply 1960.02MHz =
ch 1000 -110dBm
signal to external RF
connector X900
Y
Enable loopback BER
using RF test UI and
check sensitivity: -110
dBm BER < 3%
N
Check UHF Vc (from
C773) V:2.2...2.6V
Y
Check RXVHF Vc
(from C740),
V:0.7...1.3
Y
Page 24
TDMA1900 RX chain
Y
N
N
Nokia Corporation
CCS Technical Documentation
is OK
Start synthesizer
troubleshooting
Start synthesizer
troubleshooting
Confidential
Note! These tests
are done in local
mode by using RF
test UI
Issue 2 09/2003