Products > Test Equipment
DIY Logic Analyzer Probe and Pods for Siglent (and LeCroy) scopes
mawyatt:
Likely copies of Thomas (oz2cpu) original work, not sure if authorized or not. As clock speeds increase the details of the probe begin to show, this includes the type and nature of the cables utilized. These are improper terminated cables on both ends, either coaxial, twisted pair, or ribbon type with SGSG configuration.
Tautech kindly provided what the OEM Siglent Probes waveforms looked like, so we attempted to duplicate that performance blindly, meaning not knowing about the details inside the DSO case, and created a model for what we "thought" might be a good representative, proof being did the simulation waveform resemble the tautech provided actual waveform.
So we created our version based upon this and planned to "tweak" the component values and such to optimize the performance. We never got around to this optimization tho, as the 1st cut performed well enough for our needs at the time, and we haven't had a need to revisit this for improved behavior.......yet ;)
Best,
KungFuJosh:
--- Quote from: mawyatt on July 22, 2023, 03:10:43 pm ---So we created our version
--- End quote ---
Gonna share? 😉
mawyatt:
--- Quote from: KungFuJosh on July 22, 2023, 04:58:20 pm ---
--- Quote from: mawyatt on July 22, 2023, 03:10:43 pm ---So we created our version
--- End quote ---
Gonna share? 😉
--- End quote ---
All listed within this thread ;)
Best,
KungFuJosh:
--- Quote from: mawyatt on July 22, 2023, 03:10:43 pm ---Likely copies of Thomas (oz2cpu) original work, not sure if authorized or not.
--- End quote ---
Well, now that I've read the thread, I know who the seller was. It did work well on the MSO demo board. 🤷
tautech:
--- Quote from: mawyatt on July 21, 2023, 01:16:05 pm ---These (R1 and C1) were used to attempt to mimic the Siglent response tautech had shown earlier, check the thread prior to the one this schematic originated from. You can see the simulated response and compare to the one tautech posted.
We used twisted pair for the signal lines and later just ribbon cable, recall both worked well for our needs, memory's not that good tho ???
Anyway, at one time we were going to "tweak" the component values for optimum response but never needed to do such, as it worked well enough for our needs right from the start as shown, so we've never revisited this since.
Best,
--- End quote ---
Now I have new and better SMD tweezers (ST42) I can do these measurements again if required including mainboard input measurements on a warranty replacement board.
Maybe these is a termination network there too that could help with a better match.
Tell me what you need. ;)
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version