I have used EVAL-AD5933 EBZ evaluation board to measure noninvasive bio-impedance from the radial artery.
I have configured the frequency sweeping range from 3 kHz to 11 kHz with a sampling rate of 3 Hz. Is it possible to detect the radial artery pulse from the device??
I have set the gain setting to 1x and VDD supply voltage is 3.3 V.
I don't apply a voltage on the skin separately apart from the device electrodes. I am using the bipolar configuration and I thought AD5933 EVAL board is operating with bipolar configuration.
Do I need to apply a separate voltage on the skin to measure Impedance?
I am pretty sure that all AD5933 eval boards are unpolar: everything is measured with respect to virtual ground at VDD/2 and that is the DC level applied to the skin. So it might be useful to ensure that the subject is well-isolated from the circuit ground. Is this the broad you are using: https://www.analog.com/media/en/technical-documentation/user-guides/UG-364.pdf?
I do not think you need to add any additional voltage to the skin. What is your excitation voltage? At 2V p-p one needs to be mindful of the electrode-skin interface behavior - it can be non-linear and hysteretic.
The board that I am using is EVAL AD5933EBZ which is the datasheet that you have attached in the comment.
I think my excitation voltage is 1.52 V and I do clean the skin with alcohol swabs before placing the electrodes to remove dust and sweat as well as it ensures the consistency of skin impedance. I have kept an inter electrode distance of 7 cm.
Currently, I have performed frequency sweep only with one frequency (10 kHz) and it has increased the sampling rate from 3 Hz to 17 Hz.
With this board the excitation voltage should be programmable. Are you using the demo software that comes with the board or some code you developed yourself? Since you can change the sampling rate the latter is likely, so you should be able to program the excitation voltage. The programmable excitation voltages should be 2, 1, 0.4 and 0.2V p-p, not sure how you get 1.52V.
What kind of electrodes are you using - some commercial ones like they use for ECG or something else?