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Show us your square wave

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tautech:
Square waves from SDG6022X (80 MHz max) and SDG2042X (25 MHz max)
Taken with SDS5104X, Siglent 1 GHz rated BNC cable and feedthrough 50 ohm for the SDG2042X 10V p-p screenshot. All other shots using scopes inbuilt 50 ohm input.

Mechatrommer:
few months ago verification... Rigol DS1054Z...





old Lecroy SDA6000...




Electro Fan:

--- Quote from: Mechatrommer on August 31, 2020, 04:55:43 pm ---few months ago verification... Rigol DS1054Z...





old Lecroy SDA6000...





--- End quote ---

That looks like a very fast Rigol 1054Z

Mechatrommer:

--- Quote from: Electro Fan on August 31, 2020, 05:22:03 pm ---That looks like a very fast Rigol 1054Z

--- End quote ---
thats look like it but i dont know, thats what it said... i'm also a bit surprised... (tested with Leo Bodnar 30-40ps pulser) iirc that shape only happened on that V/div setting. if i increase (or decrease, dont really remember) when the relay clicked, that shape will be screwed... so i'm not sure whats going on inside there.

this is from another source tested much earlier (Uni-T UTG962 AWG Synch output)..




Electro Fan:

--- Quote from: Mechatrommer on August 31, 2020, 06:08:13 pm ---
--- Quote from: Electro Fan on August 31, 2020, 05:22:03 pm ---That looks like a very fast Rigol 1054Z

--- End quote ---
thats look like it but i dont know, thats what it said... i'm also a bit surprised... (tested with Leo Bodnar 30-40ps pulser) iirc that shape only happened on that V/div setting. if i increase (or decrease, dont really remember) when the relay clicked, that shape will be screwed... so i'm not sure whats going on inside there.

this is from another source tested much earlier (Uni-T UTG962 AWG Synch output)..





--- End quote ---

Your measurements look like the Rise Time measurements but I can't quite figure it out.

As a frame of reference attached are a couple measurements made with Leo Bodnar's pulser; the LB pulser is spec'd for 30ps but I don't see how that can be achieved unless a scope can keep up.

The first two attachments show a Rigol 2072 spec'd for 70 MHz but that probably achieves a bit over 100 MHz - maybe at -3dB given the measured rise time of about 3.3 ns, and a Tektronix 2467B spec'd for 400 MHz which would imply a 875 ps rise time but that is measured at about 824 ps which implies a bandwidth of about 425 MHz.

In the attached chart are calcs for the 2072, the 2467B, and the 1054Z; these show that your 700 ps RT equates to a 500 MHz bandwidth and your 500 ps RT equates to a 700 MHz bandwidth.

Attached is an old spec sheet that shows some published numbers for a Tektronix 2465 and 2465A and my calculations (using the standard .35 formula) seem to arrive at similar numbers as a sanity check....
https://www.testequipmentdepot.com/usedequipment/tektronix/oscilloscopes/2465series.htm#:~:text=Increase%20in%20bandwidth%20from%20300,delay%20measurements%20(with%20CTT%20Option)

...but it's getting late here so I'm thinking maybe I've made some calc errors; however, if my numbers add up and yours are correct, I think you might have the fastest 1054Z known to mankind. :)

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