Hantek makes several DSO's that you can interface with your own software. With that capability, you can program them to detect your own(very complicated, if necessary) events and respond to them in a manner of your choosing. I've following this path for a long time using a Hantek DSO-2090, and put a basic software interface for it on Github. I think they still make the DSO-2090, but if not several of their other 'scopes can be used instead. Check out OpenHantek on Github for some idea of different models that can be used.

Essentially, I'm using my DSO-2090 as a reasonably fast A to D converter with a built-in analog front end.

 

 

You don't mention how much latency you can stand between the time your event occurs and the time you need to respond to it.

If that's not a critical factor, I'll repeat a note I offered earlier.

Hantek makes several PC-connected (USB) DSO's that come with a software interface that allows the user to create his own programs for them. That can be used to write your own code to detect the event of interest and cause the PC to fire the desired response. I do that with a Hantek 2090.

 

Will your scope produce a trigger when a pulse is greater the 100 us, but not less?

The Siglent firmware included “pulse trigger” that will trigger on pulse width using ≥ and ≤ operators. Obviously this will produce a trigger out as well.

The pass/fail system uses a mask on the X and Y axes which determine the allowed deviation of the waveform from the ideal, not quite the same thing but probably workable, and it uses the trigger out for the pass/fail pulse.

 

I think that was resolved in post #19. I was asking from the perspective of my low-end Rigol. I can see using that to distinguish noise from legitimate trigger. Although when I was playing with WWVB, I used a digital filter to sort our short pulses.

 

I think that was resolved in post #19. I was asking from the perspective of my low-end Rigol. I can see using that to distinguish noise from legitimate trigger. Although when I was playing with WWVB, I used a digital filter to sort our short pulses.

As an aside, did you know that WWVB will cease operation in FY 2019? I must say I find this very disturbing.

 

I figured it was coming with GPS et al. Listening to it sure brings back memories from a very long time ago. Kind of soothing.

It looks like a reprieve was received: https://swling.com/blog/2019/02/fy-2019-nist-budget-looks-good-for-time-stations/ (Source: Wikipedia).

 

I certainly hope it never goes off the air. First of all, it would kill a lot of consumer products.

Second, our use of over-sophisticated technology in critical infrastructure roles makes us increasingly vulnerable. I felt the trend, viscerally, when the 2182KHz watch was discontinued. Then LORAN fell to GPS. Now most people lack a POTS twisted pair, which was always reliable. If we have a large disaster, we won't have the simple and effective infrastructure to recover.

 

I had read awhile back that LORAN was being returned for a backup. This is not where I read it and is a bit out of date:
https://arstechnica.com/gadgets/201...ke-global-return-as-gps-backup-because-cyber/

Back-up is good. Besides, my clock at home is disciplined by WWVB.