5 Mar
2004
5 Mar
'04
9:54 a.m.
On Fri, 5 Mar 2004, Tony Duell wrote:
Sure, as long as the cable is short, flat cable works fine (I've used it many
times). Using the 1/6 rise time rule of thumb and assuming a pessimistically
fast 5 ns rise time and a very slow cable with 1/2 C progation rate, gives you
a maximum impedance mismatch length of about 6 inches.
Peter Wallace
As Paul and
der Mouse suggested, I agree that it would be worth making
up a short flexible AUI cable. Cat 5 is 100-ohm, and ribbon cable is
not far off that IIRC; you could use STP instead of UTP to get the
shield (some Sun cables are STP), or just ignore it for really a short
(a few inches) cable. Or a chunk of old good-quality serial cable
I wonder if IDC cable would work for a very short (a few inches) length?
Just enough to turn the transceiver 'round the corner' or whatever.
-tony