I received an Analog Discovery 3 Pro Bundle and an Impedance Analyzer Adapter hardware module this last Monday. I connected the Impedance Analyzer Adapter to the AD3 via their headers, and noticed that it was a very loose fit, with no resistance from the Adapter's header. It was difficult to keep the header properly seated, with the end for the digital I/O pins wanting to skew away from the AD3. By comparison, the BNC Adapter's header fits snugly with the AD3's header, and the AD3 flywire assembly's header fits very, very snugly.
As an example of how loose is the connection, I can easily move the end of the Impedance Analyzer Adapter's PCB that is opposite the header up and down after the Adapter has been attached to the AD3. However, the Impedance Analyzer Adapter's header fits very snugly on the BNC Adapter's pass-through header. It is rigidly attached and I can't move the PCB up or down.
As a test of the Impedance Analyzer Adapter, I put a 39 pF ceramic disc capacitor in its J2 socket and ran the WaveForms Impedance Analyzer instrument.
Capacitance and phase plots with the Adapter board level with the AD3, header fully seated. The Capacitance plot looks like there is no capacitor present and the Phase plot is displaying noise.
Running the same plots with small shims under the Adapter board's rubber feet so that end of the board is tilted upwards, header fully seated. The Capacitance plot shows the proper value of the capacitor being tested and the Phase plot is correct at a constant -90 degs.
Same plots after removing the capacitor, board still tilted, header fully seated. They look similar to the plots with the capacitor installed on a level adapter board.
It seems like the Adapter's header does not make proper electrical contact with the AD3's header unless a small amount of force is applied to the connectors to get a solid connection. Is this a correct assessment?
Edit: If it is, is the Adapter considered defective and should be replaced under the product warranty? Or is this a larger problem with what seems to be differences in contact dimensions between the headers used for the adapter modules and the headers used on the AD3 and its flywire assembly? The differences are tolerable in general but become too extreme in the specific case of the sockets on the Impedance Analyzer Adapter and the pins on the AD3?
Thanks!