Nokia NHM-1 Series Troubleshooting Instructions page 31

CCS Technical Documentation
Checking of LNA gain steps in REX:
Press "RF Stop" in WCDMA RX Control in Phoenix SW.
Set LNA gain to "High" and BB AGC to "18 dB" value.
Check the testpoint J800 with oscilloscope, signal swing should be nearly the same as
with original settings.
Press "RF Stop" again.
Set LNA gain to "Low" and BB to "42 dB" value.
Check again the tespoint J800, signal swing should be nearly ( ca. 10% less) the same as
with original settings ( because this LNA gain step nominally is –13 dB from MID to LOW
and BB AGC compensates by 12 dB ( =42-30 dB setting difference) the overall gain.
Issue 1 11/03
Nokia Corporation.
NHM-1
Troubleshooting instructions
Page 31