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HMC346AMS8GE Waveform Distortion

Question asked by matterwave on Aug 10, 2018
Latest reply on Aug 17, 2018 by matterwave

I set up an evaluation board for the HMC346AMS8GE together with the Single-Line Control Driver option as recommended in the datasheet.

 

Unfortunately the waveform is distorted during minimum attenuation and the attenuation for different control voltages is not uniform.

 

I have a picture attached which illustrates the problem. Is this an inherent problem of the chip itself or did I mess up?

Input frequency: 25 MHz

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