Quote:
Originally Posted by brodricj
No. The testing showed 50 ohm cable on a 50 ohm interface performed better than 75 ohm cable on a 50 ohm interface. All Esoteric need to do is build all their digital I/O to 75 ohm spec and you can forget about 50 ohm cables. Can use Mexcel 7N-DA6100 or Shunyata Clock 75.
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Impedance matching (50/50, 75/75, etc.) is important, but for this application (relatively low RF frequencies, short cable distances, low powers) not a major concern. Mismatched impedances cause reflections - similar to light reflecting from water. A 50 ohm to 75 ohm impedance mismatch will reflect (return) about 20% of the outgoing signal back to the source.
Best bet is a good cable at the correct impedance.
Pasternack (US based) is an RF specialty company with a large catalog of cables at various impedances.
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Last edited by clpetersen; 05-26-2018 at 08:24 AM.
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