What would be a reasonably cheap way of checking frequency calibration? I have an old hp 5328, with oven. I also have one of those cheap GPS modules where the PPS output can be reprogrammed. I set it to 1kHz and the counter showed 1.0000kHz. Sounds good?
There are u-blox modules that can be reprogrammed to output 10MHz and the 5328 can use an external 10MHz for timebase. Would such a module (below) work?
?
Anders