User Guide

CCS Technical Documentation Troubleshooting — RF
RH-17
Issue 1 04/2003 Nokia Corporation Confidential Page 43
IMPORTANT NOTE: AGC PDM values will change (sometimes drastically) as the phone
warms up. The table above lists PDM values for when the phone is first turned on. After
10 minutes at full power, PDM values will be different.
Table 2: RF/Analog Probing for Cell/AMPS Transmitter
PDM
value
voltage
PDM
value
voltag
e
Balun Out PDM value voltage connector
typical v typical v dBm typical v dBm
-409 0.17 -110 0.68 -15.2 +/- 3 dB -19 0.85 24.8 (PL0)
-409 0.17 -92 0.72 -13.2 +/- 3 dB -123 0.67 23.7 (PL3)
-409 0.17 -76 0.75 -15.4 +/- 3 dB -310 0.34 21.0 (PL4)
-249 0.45 -66 0.77 -19.4 +/- 3 dB -330 0.31 16.3 (PL5)
-104 0.70 -56 0.78 -22.4 +/- 3 dB -330 0.31 13.5 (PL6)
37 0.95 -48 0.80 -27.9 +/- 3 dB -330 0.31 10.4 (PL7)
CELL CDMA
-403 0.18 -115 0.680 -14 +/- 3 dB 220 1.29 25
-403 0.18 100 1.067 -38 +/- 3 dB -270 0.41 -2
200 1.25 100 1.067 -56 +/- 3 dB -331 0.31 -23
450 1.70 105 1.076 -70 +/- 3 dB -331 0.31 -39
511 1.81 170 1.190 -80 +/- 3 dB -331 0.31 -50
See Table 3 for test points for AGC.
Probing Point
Probing
Location on the
board
Probed Absolute
Power (dBm), or
gain/loss (dB),
or voltage (v)
Where to start checking if RF
power not correct (soldering,
shorts, DC power applied if active,
correct voltage of DC signals,
otherwise replace)
Robin Tx I/Q input from UEM TP1a, TP1b, TP1c
and TP1d
Check with Osc
probe for Input,
check also for
same dc offset on
each point.
Check that UEM and Robin are sol-
dered correctly.