Nokia RA-2 Rf Description & Troubleshooting page 21

RA-2/3
7 - RF Description and Troubleshooting
I and Q signals and between different bands as well.
GSM1900 receiver burst mode I or Q signal at ch 661 with input signal
1960.067MHz, level –90 dBm at RF-connector.
Trace2: With wider time scaling both monitoring and own Rx bursts are seen,
1 burst (shorter) is monitoring and 2
st
Trace1: External LNA VCC supply voltage at burst mode, input level –90 dBm.
Measured from test point LNA_VCC
Issue 1 09/04 COMPANY CONFIDENTIAL
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burst (longer) is own Rx burst.
nd
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