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DIY Logic Analyzer Probe and Pods for Siglent (and LeCroy) scopes

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oz2cpu:
>User need just understand this for avoid some traps, as is always important what ever feature is used. "Know your tools..." and so on.

EXACTLY and that is why it is very smart we deep dive into all this,
using the LA alone, versus together with digital, what happens, and most important why,
this way we all get a smarter, faster, and more happy day,
next time we need to debug some real life stuff :-)

rf-loop:

--- Quote from: oz2cpu on March 16, 2021, 08:04:45 am --->User need just understand this for avoid some traps, as is always important what ever feature is used. "Know your tools..." and so on.

EXACTLY and that is why it is very smart we deep dive into all this,
using the LA alone, versus together with digital, what happens, and most important why,
this way we all get a smarter, faster, and more happy day,
next time we need to debug some real life stuff :-)

--- End quote ---

Y E S

mawyatt:
Here's the latest concept we're looking into. This features an expansion of the base connector case to the MSO to allow dual 16 pin 2 row headers, one for digital inputs 0-7 and the other for 8-15. These are designed to support 8 pairs of twisted ribbon cable, or a common 16 wire ribbon cable with GSGS type configuration.

With this configuration the base case can remain attached to the MSO and the ribbon cables plugged into the base header connectors, also allows different cable types or lengths to be used between the Base and the Probe POD. The POD supports a 16 pin header with 8 digital lines, and 8 ground lines, but also can directly support single lines with a 1 pin header (Dupont type).

Should be a very flexible architecture allowing experimenting with different cable types & lengths. We've just ordered, per recommendation by oz2cpu, a 3D printer and downloaded Fusion 360 to try and "get up to speed" with 3D modeling and printing, not sure how long this will take before any actual 3D printed cases emerge since absolutely no prior experience with any of this 3D stuff. Also, ordered a few twisted pair ribbon cable types to evaluate and measure characteristics, along with various header types, connector pins & crimping tools.

Custom PCBs for the Base and PODs are not a problem or big delay, and will be flexible enough to allow variations and maintain good signal integrity.

Anyway, putting this out for others to comment and maybe even consider.

xandmann:
According to a test report regarding PCIE connectors from Samtec, the connector in question will withstand (depending on the angle of pull) between 300-600 mating cycles and a 90 deg pull force of 50 kg.
So using "bare PCB" adapter solutions without 3D printed casing shouldn't be a problem, however depending on ones bench setup frequent insertion/removal might cause problems in the long run.

oz2cpu:
i prefer, and suggest, and recommend to use some sort of steering of the pcb into the scope LA socket,
this way it goes in correctly, stay in right angles, and this way the scope part will live longest possible,
the work is worth it, if anyone like fusion files, or step files, or stl files for free, simple PM me.
AND you are also welcome to get gerber files or altium design files

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