Category Archives: ocxo

A DIY EMC Probe From Semi-Rigid Coax And An SDR

Do you have an EMC probe in your toolkit? Probably not, unless you’re in the business of electromagnetic compatibility testing or getting a product ready for the regulatory compliance process. Usually such probes are used in anechoic chambers and connected to sophisticated gear like spectrum analyzers – expensive stuff. But …read more

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Posted in electromagnetic compatibility, emc, fft, ocxo, probe, radio hacks, RTL-SDR, sdr, spectrum analyzer, testing, wireless hacks | Leave a comment

Drifting Instrument Presents Opportunity to Learn about Crystal Oscillators

Sure, we all love fixing stuff, but there’s often a fine line between something that’s worth repairing and something that’s cheaper in the long run to just replace. That line gets blurred, though, when there’s something to be learned from a repair.

This wonky temperature-compensated crystal oscillator is a good example of leaning toward repair just for the opportunity to peek inside. [Kerry Wong] identified it as the problem behind a programmable frequency counter reading significantly low. A TCXO is supposed to output a fixed frequency signal that stays stable over a range of temperatures by using a temperature sensor …read more

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Posted in ocxo, repair hacks, standard, TCXO, teardown, temperature-compensated crystal oscillator, trimmer | Leave a comment

Function Generator Gets DIY Frequency Standard

For those of us who like to wrangle electrons from time to time, there are some exceptional deals out there for low (or at least lower) cost imported test equipment. If you’re willing to part with a few hundred dollars US, you can get some serious hardware that a decade ago would have been effectively outside the reach of the hobbyist. Right now you can order a four channel oscilloscope for less than what a new Xbox costs; but which one you’ll rack up more hours staring at slack-jawed is up to you.

Of course, these “cheap” pieces of …read more

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Posted in ocxo, peripherals hacks, Siglent SDG 1025, test equipment | Leave a comment