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Has anyone tested the CYW92706WCDEVAL with a calibrated test set such as the Anritsu MT8852B? My evaluation board is failing the EDR Sensitivity and BER Floor tests at the low and high frequencies. I thought it might be rolloff from the filter that is routed inline with the RF signal, but switching in the discretes with the zero ohm resistors had no better effect. I also noticed that the impedance match with the discretes is awful, whereas it is decent with the filter.
Solved! Go to Solution.
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If I place the PCB in an RF isolation box, the sensitivity tests pass.
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Try to soldering the RF connector to R12_C which will connect the MT8852B to BT chip directly and test. This is accountable for chip's RF performance.
Regards
Jenson
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If I place the PCB in an RF isolation box, the sensitivity tests pass.