I have a doubt concerned with phase measurement of ad5933. here is my calculation parameters,
frequency 30 khz,
i calibrated the system using 5.5 Mohm and i got the phase degree=-26.56. and i replaced the calibration resistor and place a capacitor of 22 pf and i got the phase=17.73.
According to the data sheet the formula is phase of the system=system phase-unknown phase.
therefore -26.56-17.73=44.29.where i should get -90 degree.
Is my method of phase calculation is right???
HOW TO SWEEP THE FREQUENCY, when i am setting start frequency=30khz and frequency increments=10khz and number of increments=7, where i am sweeping 30khz to 100khz, my osciloscope shows only 30khz,its not get sweeped why???
Impedance calculation is accurate using AD5933, but phase measurement is not up to the mark!! why??????