Author Topic: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand  (Read 5884 times)

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Online EEVblogTopic starter

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EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« on: July 27, 2020, 01:57:40 pm »
Dave shows how to use reference waveforms to capture, compare and time correlate more then one signal at a time on your oscilloscope when you just can't hold all those probes at once.

 

Offline Zbig

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Re: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« Reply #1 on: July 27, 2020, 08:20:19 pm »
Fun factoid:
My PCBite kit with SP100 handsfree scope probes has just arrived few hours earlier today ;)
 

Offline Unixon

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Re: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« Reply #2 on: July 27, 2020, 08:31:27 pm »
Dave, that's cool feature but it requires repeatedly stable behavior from a faulty device under test which is kind of counterintuitive. Am I wrong?
 

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Re: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« Reply #3 on: July 28, 2020, 03:40:46 am »
Dave, that's cool feature but it requires repeatedly stable behavior from a faulty device under test which is kind of counterintuitive. Am I wrong?

That's why I said you have to find a stable reference point like a power supply ramping up. Trivial to check this first.
 

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Re: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« Reply #4 on: July 28, 2020, 03:43:22 am »
Fun factoid:
My PCBite kit with SP100 handsfree scope probes has just arrived few hours earlier today ;)

How is that better than any other flexible arm clamp system for an existing probe?
It does look sexy though and I have those magnetic PCB clamps  :-+
EDIT: ah, I see it's a spring loaded tip.
« Last Edit: July 28, 2020, 03:59:11 am by EEVblog »
 

Offline Unixon

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Re: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« Reply #5 on: July 28, 2020, 07:19:41 am »
That's why I said you have to find a stable reference point like a power supply ramping up. Trivial to check this first.
I mean in a faulty device that point can be intermittently unreliable too and you won't even know it breaks your channel synchronization.
 

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Re: EEVblog #1324 - Scope TRICK: 2 Probes 1 Hand
« Reply #6 on: July 28, 2020, 07:53:15 am »
That's why I said you have to find a stable reference point like a power supply ramping up. Trivial to check this first.
I mean in a faulty device that point can be intermittently unreliable too and you won't even know it breaks your channel synchronization.

Power supplies (especially linear ones) are pretty basic stuff, they don't just go haywire.
Obviously if you can't find a suitable sync then you don't use this trick, no big deal.
 


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