¿ªÔÆÌåÓýOn 2024-08-29 06:05, Don't Know via
groups.io wrote:
A lot of the information you are looking for may be found in the manual "Logic Analyzer Probing Solutions" available from Keysight On the flying lead probe you have pictured, the individual wires from the connector to the plastic piece with the probe number on it is a coax and may be lossy coax however even it it is, it is only about 22cm long and would contribute little to the 90.1K I measured compared to the the resistance of the isolation network housed in that same little piece of plastic.? I suspect the last 3cm from the isolation network to the tip is just a straight wire.? In the manual there is a section concerning custom probing that includes cautions about lead length and grounding.?? When I first got an HP analyzer? I made up rough isolation
networks based on the information from the above mentioned manual
and used about 15cm long jumpers to connect to the signals I
wanted to monitor, they worked but may have been problematic if I
had tried to monitor any really fast signals. ? Each of the 40 pin connectors has one signal line designated as a clock the letters assigned relate to the pod number for instance the pod 1 in your picture is clock "J", pod 2 has clock "K" and so on, this is how the software on you logic analysis system will refer to the clocks.? In a pinch the clock lines can usually be used as another probe line too. Paul.?
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