Receiver Rf Test Points - Nokia 1265 Description And Troubleshooting

1265 (RH-104)
RF Description and Troubleshooting

Receiver RF Test Points

For the test points in Figure 12, an external signal source of –25 dBm was injected
to the RF input. Set LNA GAIN STATE = 3 .The signal was then traced throughout
the receiver chains. An CMU200 call box is recommended. (Open non-signaling
mode, press the SG soft button, and then select CW.) Inject a continuous wave
(CW) for Cell (881.52MHz) at a fixed –25 dBm power level. Measurements were
taken with the RF Probe. Signal levels are approximate, and the accuracy may be
+/- 2 dB or more depending on the probe position and grounding.
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Table 5 includes the descriptions and values for Rx RF troubleshooting test points
shown in Figure 14.
Test Point
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Figure 12 Receiver RF troubleshooting test points
Description
LNA IN
RX SAW INPUT
RX SAW OUTPUT
Table 5: Rx RF Test Points
© 2007 Nokia Corporation
Value
-28dBm
-48dBm
-51dBm
Company Confidential
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Issue 1 04/2007