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The hopping time of HMC704

Question asked by Middle.Liu on Feb 19, 2017
Latest reply on Feb 24, 2017 by Middle.Liu

I used HMC704's integrated mode in my project. I changed the output frequency from 7500MHz to 7000MHz. I tested the SCLK pin, SEN pin and VTrun of VCO using oscilloscope and found there is a delay about 50uS between finished writing registers and charge pump outputting(the delay is shown in blow picture). now my question is why there is delay? Dose HMC704 indeed has that delay or I made a mistake in wiriting registers? I tested HMC704 in fractional mode, there is not delay.