oscilloscope for digital pulse

[5282]

hello
i want oscilloscope for high speed digital clock like 100mhz.
i just want oscilloscope  to know the pulse phase degree(time delay between pulse) come out from fpga
so what i should search for oscilloscope( sample rat or analogue bandwidth) is important for me ??.
i don't have enough money("my money can buy 1gsa/s oscilloscope").

[Benta]

i don't have enough money.

Well, that limits your options.

If you just need to make certain you have a quadrature signal, a fast XOR gate with output rectification and smoothing could do the job.

[cstratton]

Making sure your logic is correct, that you've properly used the FPGA toolchain's timing constraint mechanism, and that you've matched the board delays would go a long way towards achieving your goal.

[BravoV]

Repeatedly begging on multiple threads throughout the forum won't help you.

[Simon]

We had all of this a little over a year ago......

[5282]

 1gsa/s  oscilloscope can help me ?
i want to measure 2.5ns delay between pulse.

[txescientist]

Well, it is difficult. See the attachment   

[tautech]

1gsa/s  oscilloscope can help me ?
i want to measure 2.5ns delay between pulse.

Probably the best bang for buck for your needs is the 2 ch 200MHz SDS1202X-E.
They've been in the marketplace for nearly 1 year and proving to be very popular.
All the documentation so you can research it is here:
https://www.siglenteu.com/digital-oscilloscopes/sds1000x-e-series-super-phosphor-oscilloscopes/

There's a thread here on EEVblog too that's easy to find.

You can find your closest supplier here:
https://www.siglenteu.com/how-to-buy/

[abraxa]

1gsa/s  oscilloscope can help me ?
i want to measure 2.5ns delay between pulse.

Probably the best bang for buck for your needs is the 2 ch 200MHz SDS1202X-E.

I know you're trying to be helpful but capturing a 100 MHz square wave with a 200 MHz analog bandwidth isn't going to be fun. Unless I misunderstood the thread starter and he/she really means milli Hertz, that is.

[tautech]

1gsa/s  oscilloscope can help me ?
i want to measure 2.5ns delay between pulse.

Probably the best bang for buck for your needs is the 2 ch 200MHz SDS1202X-E.

I know you're trying to be helpful but capturing a 100 MHz square wave with a 200 MHz analog bandwidth isn't going to be fun. Unless I misunderstood the thread starter and he/she really means milli Hertz, that is.

From the OP:

i want oscilloscope for high speed digital clock like 100mhz.

I'd take that to mean 100 MHz as I know of no 'high speed digital clock' that runs at milli hertz.

So many post here using the wrong units and we get sick/lazy about correcting them, but we should.
When there's enough info in a post so that's clear what is meant we can then make a recommendation.


Probing technique and the 2 signal sources will determine the accuracy of a '2.5ns delay between pulse' but all things being equal (probe connection and same signal source) the DSO mentioned is capable of such measurement.

As with many things that start to push the envelope of an instrument, operator skill needs to be up to the task.

If you can recommend a better instrument at a better price point, well please do.

[Zero999]

An oscilloscope is no good for this anyway. A timer counter is the correct tool for the job. No doubt it's possible to build one with an FPGA, but don't ask me. I have no experience with them. They're magic, as far as I'm concerned.

[vk6zgo]

If the Oscilloscope is comparing the phase/time delay between two nominally identical waveforms, there is a fair bet that the distortion to each waveform due to limited 'scope bandwidth will also be identical, so you can measure the time difference between the same point on the two waveforms.

Maybe, this is not good enough for absolute measurements, but once they are done, it may well be good enough for checking continual compliance.

[5282]

thank to all for helping me.

[Mechatrommer]

1gsa/s  oscilloscope can help me ?
i want to measure 2.5ns delay between pulse.

Probably the best bang for buck for your needs is the 2 ch 200MHz SDS1202X-E.

I know you're trying to be helpful but capturing a 100 MHz square wave with a 200 MHz analog bandwidth isn't going to be fun.

if money is the limiting factor. any 1GSps 100-200MHz scope capable of 2ns per division or smaller should be able to show some usefull info about it. with proper probing (termination technique) and the user brain power, this can be a good practice at debugging with limited capability tool. knowledge is power, albeit will not be a nice square (sine) but its better than breaking a bank.

[5282]

thank you but i'm  very Puzzled between.
buy low cost 100mhz oscilloscope and  hack it to 200mhz.
are there any different between hacked oscilloscope and original oscilloscope??.