Hi all, I have a number of underwater transducers that I want to measure the impedance of by using an impedance analyzer. I'd like to create an automated system that cycles the leads of the impedance analyzer to the various transducers, perhaps using something like a decoder or a number of computer controlled switches. However, since I'm interested in measuring the impedance of the transducers, it seems like I need a switching device that doesn't affect the output signal from the impedance analyzer to the transducer. The output signal is fairly low-powered, but would I need to use something like a relay to do the switching? It seems like most IC parts have input and output impedances that would effect the signal and thus the impedance measurements. If I use a relay, does it matter if it's an electromechanical relay or a solid-state relay? Or, do you have any suggestions as to what a better option may be? Thanks!