Waveform speed - does anyone use a small frequency counter?

[alank2]

Hi,

I've seen a lot of posts where people hookup a second scope or frequency counter to the trigger out on their scope to see the waveform speed.  Has anyone found a small cheap counter that you could just leave plugged in?  Why they don't just show this on the display I don't know.  It seems one could easily make a small one that you could plug into the scope USB for power...

Do you need to know the wfm/s when using it?  Probably not, but it might be nice to know...

Thanks,

Alan

[Alex Eisenhut]

http://www.ebay.com/itm/1-MHz-1-1-GHz-Frequency-Counter-Tester-Measurement-For-Ham-Radio-/121421950093?pt=US_Radio_Comm_Meters&hash=item1c454fec8d

Looks OK but how you get 1GHz through a MTA-100??? Maybe those h.fl connectors?

[alank2]

I saw some of those, but this would need to be 1 Hz to 200 kHz (to 1 mHz)...

[Alex Eisenhut]

I saw some of those, but this would need to be 1 Hz to 200 kHz (to 1 mHz)...

Ah, well that's another thing. No idea.

[Vgkid]

This is pricey, but it is rather interesting
http://www.ebay.com/itm/eMetrPlus-SFM-112A-Frequency-Counter-0-8999999Hz-to-2-4GHz-Portable-Bench-/161207991532?pt=LH_DefaultDomain_0&hash=item2588bebcec

[kwass]

I saw some of those, but this would need to be 1 Hz to 200 kHz (to 1 mHz)...

Ah, well that's another thing. No idea.

Maybe this one: http://www.ebay.com/itm/60-MHz-FREQUENCY-COUNTER-1Hz-RESOLUTION-Temperature-Voltage-Meter-UART-USB-/120971048751?pt=US_Radio_Comm_Meters&hash=item1c2a6fb72f

[alank2]

Maybe I should make one as a for fun project.  I am thinking of something tiny that could be put next to or even perhaps under a scope.  Maybe a 0.36" LED or even a bubble display like this:

https://www.sparkfun.com/products/12710