Referring to UG-364 (AD5933 Evaluation Board User Guide) page 20, I'm interested in 100 Hz-1 kHz frequency range to measure low impedance using Zcalibration of 182 Ohm. However, the lowest clock frequency I can go is 2 MHz (refer to the attachment). When I followed the Guide ie using 200 kOhm resistor, I could go to 100 kHz as the Guide suggest. My uestions are:
1. Is the result I get because of low impedance measurement?
2. Does the evaluation board have a built in circuit to measure low impedance, because I thought AD8606 is for that purpose?
3. I use a function generator to supply the MCLK clock signal. Is there any way I could tap the included crystal clock AEL4303 and scale the signal?