Will a test cabinet to house the AT3600 and amplifier with individual holes for cables cause any performance problems? Also, will using high powered magnets for door latches located 6 to 12” from the AT3600 and amplifier cause any issues?
1. If the fixture is separated from the AT3600 there will be additional parasitic effects due to the extra resistance, inductance and capacitance of the Kelvin connection. If the external fixture is compensated at the position of the DUT, compensation will negate the extra impedance effects. This will be applicable at low frequency (up to around 100 KHz) but at high frequency up to 3MHz compensation may not be possible and manual offsets may have to be applied. I have seen Kelvin leads up to 6 feet long in low frequency applications.
This will require careful evaluation to ensure measurement accuracy is maintained.
2. I do not believe the magnets will affect the AT3600 or power amplifier but they may affect the part being tested in some way.