User Guide

Nokia Customer Care Troubleshooting - RF
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Issue 1 - Revision 002 09/2004 ©2004 Nokia Corporation Company Confidential Page 31
PCS Receiver Check from RF to IQ
Use the following values to check the PCS receiver functionality from RF to IQ output.
1. Start Phoenix in Local Mode with only the RX path turned on.
2. Inject a –75dBm CW signal of 1960.5MHz (i.e. 500kHz offset from 1960MHz or
10 channels away).
3. Measure a 500kHz tuning on the analyzer. You should see a typical -22dBm IQ
tuning. If the 300kHz tone works but the 500kHz tone does not, it is possible that
the BB filter was not set by Phoenix.
Figure 25: Receiver IQ Level on PCS Band
Figure 25 shows the PCS spectrum with an inject tone at -75dBm, as well as the IQ
output test points. Note that DC is present on the IQ output test points, and all test
points should be approximately equal.
dBm
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
PCS I Q Output
Trace A
Centre: 500 kHz Span: 200 kHzAtten: 10 dB
Res BW: 3 kHz Vid BW: 3 kHz Sweep: 100 ms
5/5/2004 3:37:55 PM HP8595EPcsIQ.spt
2
2
Trace A
503 kHz
-22.4500 dB
m