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AD5933 wide range sweep with variable MCLK

Question asked by Shehzad on Dec 10, 2015
Latest reply on Dec 16, 2015 by LouijieC

Hi all,

 

I'm trying to conduct measurements from a frequency as low as 20Hz to maximum 125kHz. For this I'm using a variable MCLK. The MCLK is fixed for a certain frequency range as per UG 364. The problem is, between these ranges I am observing erroneous peaks (wrong impedance values) near the MCLK transitions. I have tried adjusting the delay between MCLK transitions, tried to change Number of settling time cycles..but to no avail.

 

Could anyone give some ideas?

calib_10N_amp.jpgcalib_10N_pha.jpg

Best regards,

Shehzad

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