Nokia 6255 Rf Description And Troubleshooting page 40

6255/6255i/6256/6256i (RM-19)
RF Description and Troubleshooting
3. Measure a 300kHz tone on the analyzer. You should see a typical -21dBm IQ tone
for CDMA Cell.
Cell I Q Output
dBm
Trace A
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Centre: 300 kHz
Res BW: 3 kHz
5/5/2004 3:29:30 PM
Figure 32 shows the Cell spectrum and the test points located on the top side of the
main PWB. All four test points should be approximately equal. WARNING: Direct current
is present on these test points.
Figure 32: Cell spectrum and test points on the top side of the main PWB
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1
Atten: 10 dB
Vid BW: 3 kHz
CellIQ.spt
Figure 31: Receiver IQ level on Cell band
©2005 Nokia Corporation
Span: 200 kHz
Sweep: 100 ms
HP8595E
Rx_IP
Rx_IN
Company Confidential
Nokia Customer Care
1
Trace A
302 kHz
-21.2500 dBm
Rx_QP
Rx_QN
Issue 2 05/2005