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WL1837MOD: Receiver Spurious Emission problem - 2nd harmonic

Part Number: WL1837MOD

Dear TI Forum,

same as others in this forum we are experiencing higher than expected emission from 2nd harmonic in testing. The test case is receiver spurious emission, so just LO leakage no transmit operation.

Our internal tests confirm that the offending signal is the 2nd harmonic of the local oscillator. Tuning the frequency with calibrator moves the peak signal accordingly. Tests with several designs (and several units of each) always bring up the signal at around the same level. 

I open this thread to discuss with your experts the topic.

Best regards

-Rene