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DS1052E hacked to DS1102E waveform comparision

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Zyvek:
Since I'm just a basic hobbyist, this might be of more interest to me than most, but I wanted to compare my upgraded DS1052E to the other scopes in my collection. 

I just wired up a 50MHZ oscillator to compare the waveforms.  I did use the same probe (Tek P6138) on each scope, calibrated/compensated for each scope as well. The P6138 fit within the compensation range of each scope (~15pf), except the 2236.

Scope bandwidth/sample rate for each is:

Rigol 1052E/Hacked 100Mhz / 1Gs
Tek 2236 100Mhz / Analog
Tek 2340A 150Mhz / 100Ms
Tek 2445 150Mhz / Analog
Tek 2467B 400Mhz / Analog

Test oscillator was powered by an HP 3618A non-switching power supply.

I was surprised that the 2236 didn't do as well as the Rigol, given the equal bandwidth.

I was kinda hoping that the Rigol would be closer to the 2430A but of course that's not a logical thought give the 2430A's extra 50Mhz bandwidth.  I'm new to DSOs so somehow I figured the higher sampling rate of the Rigol would help.  Of course the 2430A has no easy way to save the waveform (without a GPIB equiped PC & SW) and the memory is very limited in comparison.  The 2430A seems to handle two traces without any impact vs the Rigol.  So for some finding a used 2430A might be a better deal than the Rigol (I paid ~$150 for mine)

Of course the 2445 and 2467B did better, as expected.  But I was still impressed with the Rigol overall. 

One thing that made the difference was using the P6138 probe on the Rigol vs the probes included with the 1052E.  I posted those pics in the upgrade thread here: https://www.eevblog.com/forum/index.php?topic=553.msg25021#msg25021

Apologies in advance, as I know these probably aren't very useful tests...but good nerd fun for me.

BTW, where in the Rigol setup does one set the time/date so the files saved to USB have a correct timestamp?  I couldn't find it in the manual.

Mechatrommer:
interesting. can you post picture of the rigol probe vs the teks probe P6138? is there any possibility finding/generating different shaped 50MHz wave/source to compare? thanx for letting us know.

i'm interested in looking the difference between:
rigol + ori probe
24302236 + P6138
rigol + P6138
2467 + P6138
from the pics you posted here and in the other thread, i'm expecting the performance of 24302236 + P6138 will be in the middle between rigol + ori probe and rigol + P6138.

jahonen:
Why did you use the long ground clip for such a measurement? The long ground clip practically destroys the true performance as can be seen from my demonstration.

Probe bandwidth is usually measured with clip removed and using BNC adapter which grounds the sleeve very near the tip.

Regards,
Janne

Mechatrommer:
P6138 in Ebay... $100 for a pair? gulp!... i'll be waiting for a while.
thanx janne, for the info as well. nice hack.

Zyvek:

--- Quote from: jahonen on November 24, 2010, 11:21:01 am ---Why did you use the long ground clip for such a measurement? The long ground clip practically destroys the true performance as can be seen from my demonstration.

Regards,
Janne

--- End quote ---

Thanks, I'm always up for learning a new tip. The Tek Probes don't have the cool spring ground tip, but I suspect this will do:

there seems to be little difference between the two?

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