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AD9552 VCO calibration

Question asked by rocqip on Aug 5, 2011
Latest reply on Jan 23, 2012 by DNL

Hi colleagues,


I have still a question about the vco calibration process of AD9552.


If I want to change the output frequence a little bit away from the current setup and I know exactly that the vco frequency band will not be changed for this new output freqeunce setup, is it necessary to force the AD9552 to do vco calibration via SPI command? That is to say, I want to only modify FRAC and MOD setups and keep all other settings, in this case, is vco calibration required or not?


Bascially, we want to realize on-the-fly tuning function.