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Products => Test Equipment => Topic started by: analogRF on September 29, 2017, 07:23:31 pm

Title: question about LeCroy LC584 glitch capturing
Post by: analogRF on September 29, 2017, 07:23:31 pm

Hi
I just ended up buying an LC584AL. I hope it arrives safe and sound and it actually works  :scared:

However, one question is bothering me and that is LC584 does not have the Peak Detect acquisition mode that is present on LC534/574. Why?
Why would they remove such a handy mode that is available on many scopes?

Can it capture rare glitches in another way (by special triggering maybe) that does the same thing as Peak Detect mode?

Regards

Title: Re: question about LeCroy LC584 glitch capturing
Post by: analogRF on September 30, 2017, 02:37:52 pm

any comment on this is appreciated

Title: Re: question about LeCroy LC584 glitch capturing
Post by: nctnico on September 30, 2017, 03:25:12 pm

Peak-detect isn't equivalent to capturing glitches using a trigger.
Peak-detect is there to show the extremes of a signal in a longer sample interval than the samplerate. At long time/div settings the sample interval will be long enough to miss narrow pulses or you may get aliased waveforms. For fun feed the scope a 10.000001MHz sine wave and force the samplerate to 1Ms/s.

Edit: better clarification

Title: Re: question about LeCroy LC584 glitch capturing
Post by: DaJMasta on September 30, 2017, 07:11:31 pm

If you just wanted to trigger on a high peak, all you'd need to do is put your trigger level above the reasonable signal level you're expecting to see.  The LC584 should have pretty comprehensive trigger options, then peak detect functionality in the measurement options as well as math function, so my guess is what you're looking for is still there.