Re: Question about cables and probes for hp 16715a.
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The only place lossy cable is present is in the 4.5-foot coax ribbon cable going from the chassis to the pods. ?Earlier versions of this cable are woven, but they are still lossy. ?Its purpose is to reduce reflections to preserve signal integrity. ?(Note that this applies for the 40-pin probing system for the 16715A cards and family. ?The 90-pin probing system used on more recent cards is NOT lossy with Z approx. 93 ohms.)
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The +5V run in the ribbon cable is used to power accessories, such as the E2433-66502 training card (aka "Credit Card Board"). ?The probe pods themselves are passive do not need power.
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n addition to providing an isolation network, the flying lead pods also have a spark gap in them for static protection.
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I'd really recommend just buying the cables and pods you need. ?By the time you're done with specialized parts and your time, I don't think it would be a win or have equivalent performance. ?If you're patient, ribbon cables can be had for US$25 and flying lead sets for around US$20 (need two per cable).? Good deals can be found when buying them in sets instead of individually.
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-mark
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