Electronics > Projects, Designs, and Technical Stuff
Measuring sub 2Hz frequency with high accuracy
bdunham7:
OK, that's the hardware counter. Scroll up to 6-25 and 6-26. If the waveform is displayed on the screen, the measurement parameters 1 and 2 should give you what you want. Did that work?
ricko_uk:
yes I just tried it and as soon as I increase the frequency above 15Hz not only it shows the correct period value but it does so with four decimal points. But as soon as it goes below 15Hz it suddenly changes the value to "<15Hz"
joeqsmith:
Old HP5328A attached to a GPS. The GPS runs 24/7 and is the reference for my lab. Note, there are two more ranges, if needed.
bdunham7:
--- Quote from: ricko_uk on June 07, 2020, 05:36:32 pm ---yes I just tried it and as soon as I increase the frequency above 15Hz not only it shows the correct period value but it does so with four decimal points. But as soon as it goes below 15Hz it suddenly changes the value to "<15Hz"
--- End quote ---
This is in the measurements menu? Can you post a picture of how your screen looks? If that scope can't do this measurement then Rigol owes you another apology.
The photo is my ancient dinosaur Tek 2221.
ricko_uk:
Thank you bdunham7,
it does measure it if I put the entire waveform on the screen but as per my oy original post then the resolution is very low. I needed to measure it with a high precision (as high as possible, ideally 4 or more decimal digits).
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