Hameg mainframe HM8001 system, plugin module explained in this video is HM8021 1GHz Frequency Counter. The unit shown is from 1985,
Spec : 10Hz to 150MHz input B, 100MHz to 1GHz input A, uses prescaler chip called TFK U664, i think it is broken, need so much more input power,
Input B also got a very good Periode feature, super good for low frequency signals. internal 10MHz OVEN osc is very good and stable.
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#repair
#test
#teardown
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I use auto generated subs, i am sorry there are a few spelling errors,
maybe one day they can do it better..
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