Dave C: A small coil (several turns) of wire...... both ends hooked to a scope probe and ground lead.... observe waveform on a wide enough bandwidth scope.
-- Best Regards, Daniel Sofie Electronics Supply & Repair
DaveC: Even a 20MHz scope will produce some response at a higher frequency but of course it will be at a lower level because it is outside of the calibrated specified bandwidth. I have a 100MHz scope that I regularly use to check my Ham Radio equipment at 144 MHz and 220 MHz. Give it a try...... if you can see some kind of waveform when you key the transmitter then I would guess that it is working..... or at least putting out energy..... of course the digital coding or frequency could be incorrect due to other faults in the car remote circuitry.
-- Best Regards, Daniel Sofie Electronics Supply & Repair
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