User Guide

RH-48
Troubleshooting - RF CCS Technical Documentation
Page 14 ©2003 Nokia Corporation Confidential Issue 1 11/2003
Cell Power Amplifier
The power amplifier (PA) has the DC/DC converter (PMIC device), which controls the
transmitter. The following tables show the circuits that have an effect on the transmitter
path and how to troubleshoot them.
*Not an actual FlaLi tuning PDM. PDM to produce approximately 25dBm at antenna connector.
Tx AGC (6) -94 15 6 24
Tx AGC (7)* -280* 25 21 27
PA Power and Gain Measurements
Power Amplifier Input
Test Point
Power Amplifier Output
Test Point
pin3-Z601 left-R814
PA Power and Gain Specifications
Mode Name
Power
Output
Range
Nominal
Gain
Vcc Range
Vcc Test
Point
Gain mode 0 V0 up to 6 23.8 0.75- 0.88 C806
Gain mode 1 V1 6 to 11 25.2 1.125- 1.375 C806
Gain mode 3 V2 Not used Not used 2 - 2.5 C806
Gain mode 2 Bypass 11 up 29 3 - 4 C806
Overall Gain V0 to
Bypass
63.5 to 7.3
+/- 0.5
unit N/A dBm dB VDC N/A
Phoenix Control and Example Values
PA Gain Step
Gen IO 12 GenIO13
PA Vcc
volt (v)
Spec
Name
LL0.8V0
H L 1.2 V1
L H 2.2 V2
HH3.7Bypass
Tx AGC Tuning
Tx Tuning
AGC Step
Tx AGC
PDM
Value
Target
Power
Low Limit High Limit