Habe mal bei Ebay-Kleinanzeigen einen alten, vermutlich selbstgebauten, Frequenzzähler mit Nixie-Röhren ergattert. Dieser funktioniert erstaunlich gut, und auch seine Timebase ist ziemlich genau.
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Max freq of test equipment
Many measuring devices have a maximum frequency up to which they work correctly, as stated by the manufacturer. Above that frequency they don’t just stop working, rather they still have a range above where they still may work correctly, just aren’t as sensitive. Many oscilloscopes, for example, can work up to twice their bandwidth, but the measured amplitudes are not more than some random numbers. You can still see the waveform, but not do any meaningful measurements.
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