Rigol DS1054 is a champion

[TK]

I'm guessing all the ringing is just from the probing method used? I'd be a little concerned seeing 0.5V of noise on a 3.3V signal.

Still glad to see that even with a high sampling rate, analog bandwidth will still bite me in the backside.

You are correct, I am using breadboard and standard ground loop

[TK]

Keysight EDUX1002G modded to DSOX1102G.  2GSa/s 100MHz 2+1 channel.

[ebclr]

It's interesting that in the Rigol, you can see the counting transactions ( Channel 2 blue ) and in Keysight you see a freeze counting value Showing that only 1 waveform is acquired while on Rigol was many, I guess was 32 since you can see a transition on 5 bit

I guess you use a too long GND path, try remake  with all probes GND connect to the GND pin near the 0 button or right near PIN 21, there is a better and short GND who probably will make a more nice waveform, with less inductive effect on probe

[plazma]

Are you using the original edux model probes? Weren't they only 70Mhz?

[ebclr]

Tk do you have access to a Siglent 100Mhz arb generator?

Would be interesting to make a comparative in another scenario based on signals from that generator

[TK]

Are you using the original edux model probes? Weren't they only 70Mhz?

I am using the 200MHz probes from the micsig.  I will retest on the Keysight with the stock 70MHz probes.

[TK]

Tk do you have access to a Siglent 100Mhz arb generator?

Would be interesting to make a comparative in another scenario based on signals from that generator

I don't have a Siglent arb generator.  I have a Rohde & Schwarz CMU200 with RF signal generator (up to 2.7GHz) and the EDUX1002G with 20MHz wavegen.  I can do AM/FM modulation on both of them.

[Fungus]

I will retest on the Keysight with the stock 70MHz probes.

Keysight ships 70MHz probes? Seriously? How do they even manage to make them that bad?

There's a thread on here somewhere testing the cheapest cheap-ass Chinese probes ever and they were fine up to 300MHz.

https://www.eevblog.com/forum/reviews/cheapest-100mhz-oscilloscope-probes-hands-on-review/msg99256/#msg99256


Edit: I think we have the answer: https://www.eevblog.com/forum/testgear/new-keysight-scope-1st-march-2017/msg1220323/#msg1220323

[TK]

I will retest on the Keysight with the stock 70MHz probes.

Keysight ships 70MHz probes? Seriously? How do they even manage to make them that bad?

There's a thread on here somewhere testing the cheapest cheap-ass Chinese probes ever and they were fine up to 300MHz.

https://www.eevblog.com/forum/reviews/cheapest-100mhz-oscilloscope-probes-hands-on-review/msg99256/#msg99256


Edit: I think we have the answer: https://www.eevblog.com/forum/testgear/new-keysight-scope-1st-march-2017/msg1220323/#msg1220323

The link shows the Keysight 200MHz probe that is shipped with the DSOX1000 models.  The EDUX1000 models ship with 70MHz probes because it is a 50Mhz scope.

[Fungus]

The link shows the Keysight 200MHz probe that is shipped with the DSOX1000 models.  The EDUX1000 models ship with 70MHz probes because it is a 50Mhz scope.

All true, but irrelevant.

I'm just wondering how anybody manages to make a probe that only goes to 70MHz these days.

ie. Is it really possible to save enough money to make up for the extra costs of manufacturing/stocking multiple probes?

[Fungus]

ie. Is it really possible to save enough money to make up for the extra costs of manufacturing/stocking multiple probes?

Cynical Fungus might suspect they actually lose money by making really bad 70Mhz probes but make up for it by doubling or tripling the price of their 'premium' 300MHz probes.