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Products => Test Equipment => Topic started by: BillyO on January 05, 2023, 04:38:45 pm

Title: Playing with the Bodnar Pulser
Post by: BillyO on January 05, 2023, 04:38:45 pm

The mailman (finally - it only took a month between the UK and Canada!) delivered my Bodnar pulser yesterday afternoon and I had some fun using it to look at rise times on some of my scopes.

For each of the Siglent scopes I used the internal measurement and using cursors.  I find that with some signals the cursor method is more accurate.  However, this thing produces a pretty good square wave so keeping a couple of cycles in the sample should allow the scope to make decent measurements.

For the "improved" SDS1104X-E I got 1.67ns via internal measurement and 1.72ns via cursors.  Not bad for a $500 unit.  Note the little rise drung the top of the square wave.  This does not happen with signals that have slower rise times. :-//

For the "improved" SDS2104XP I got 686ps on internal and 660ps using the cursors.  The little bit of jitter on the pulser made the cursor measurement a little vague.

And just for fun I tried it on the under appreciated Hantek 6074BC with a single channel enabled and got 1.60ns!  How is it Hantek can make a pretty reasonable USB scope then fail so hard making standalone scopes?


Edit - For some reason I can't add the screen shot for the Hantek.  I get a "Your attachment has failed security checks". :-//  Okay, figured it out.  it has an unusual jpeg format.  Fixed it...