Thanks to everyone for your responses. I ended up sending signals from mixer to camera via XLR cables for the rest of the shoot, since there was no time to experiment further.
Yes, I’m a generalist who produces, directs, shoots, edits and does sound depending on what’s needed… not a specialized location audio professional. People who hire me know this. Film school gave me assignments and deadlines, not technical education. Everything technical I learned had to be through working on film sets, self-research, asking for advice, making mistakes, and self-correcting. I continue to expand on my knowledge every day and love lifelong learning.
What happened on this shoot was out of the ordinary. The cameraperson and I have worked together several times before, and the same setup had worked then, but for some reason, was giving issues this time. My first step was to test, test and test all the possible settings. When that didn’t work, I went to do online research and called friends in the field. And when that didn’t help, I posted here. With rental gear, I don’t always have the luxury of time and $ to run extensive tests beforehand.
So I’m sorry if what I ask is too basic for some people… I’ve always been thankful for the supportive film community in Chicago, and thought I’d find the same here on Creativecow.net.