Sometimes it’s useful to know how to find the output impedance of unknown devices such as that of my cheap Chinese signal generator (MingHe MHS-5200A) and today I saw a youtube video from W2AEW which explains how it’s done. What we need to do is take two measurements of the output voltage. In my case I set my signal generator to a 2v sine wave at 5kHz. We want a low frequency sine wave so as the coax doesn’t start to affect our measurements with reflections and such.

Earlier this year while studying for my intermediate and advanced exams the subject came up of controlling a remote station over the ham bands. I think the specific situation was specified as controlling a remote transceiver. I think there are specific clauses for telecommand for satellite control but it was a problem that set my mind in motion. Our license permits us to do this but with two seemingly contradictory terms.