Electronics > Beginners
200mhz oscillorscope probe question
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joeqsmith:

--- Quote from: Gazmon on March 29, 2019, 12:29:14 pm ---Hi,

If i have a 200mhz scope with a 100mhz probe attached and measure a 555 timer circuit connected to an flashing LED for example, then i attach a 200mhz probe to measure the same circuit

will i see a difference in readings using the higher rated scope probe.

basice question but still learning

thansk

Gazmon

--- End quote ---

Assuming they are both 10X, you compensate them, you don't use that 6" groundish lead that comes with probes and you attach them the same way,  then I doubt you would see much if any difference.
tggzzz:

--- Quote from: ebastler on March 29, 2019, 07:59:03 pm ---
--- Quote from: tggzzz on March 29, 2019, 07:29:53 pm ---Span as in wingspan. Basically longer thinner wings are better at gliding speeds - you can go further and/or faster between thermals. As you can imagine, longer and thinner tends to be more expensive.

--- End quote ---

Ahaa! Thank you!
I had totally misconstrued the "gliding" bit, although it's obvious in hindsight. Had been wondering how an aphorism can glide...  ;)

--- End quote ---

Coffee meets keyboard!

I ran into character limits in the .sig, and had to be too brief :(

.sig changed: s/Gliding/Glider pilot's/ :)
David Hess:
The edge from AC or LVC logic is fast enough to reveal the difference between 100 and 200 MHz operation.  The circuit will need to be directly connected to the probe tip without using the probe's standard ground lead which is too long for accurate results even at 100 MHz.

The bandwidth rating of an oscilloscope probe is better understood as the bandwidth within which the probe will faithfully reproduce the input.
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