Help with HP 4951B protocol analyzer + 18179A
Roy J. Tellason
rtellason at blazenet.net
Sun Feb 19 11:48:08 CST 2006
On Friday 17 February 2006 10:53 pm, John Allain wrote:
> > For video applications, you need a 75 Ohm plug. Almost all other
> > appications (test equipment, ethernet) use 50 Ohm.
> Sounds a little off. Cables are important, with impedance
> varying with diameter, _Terminators_ are important, coming
> in the 50, 75 Ohm varieties mentioned, but the connector
> itself being 50 or 75 Ohm? First I've heard of this.
> The connector rear half can come in sizes to match the cable
> OD, that's about it by my understanding. A mechanical, not
> electrical difference.
> John A.
> important? probably not. thread drift? probably!
And then there are the couple of ARCnet cards I have around here someplace,
along with terminators (I hope!), that are using 62 ohms impedance...
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