Pertec Interface Cable Length
dj.taylor4 at comcast.net
Fri Aug 9 23:05:46 CDT 2019
I have a question about cable length - any electrical engineers in the
Connected a Qualstar 1260 tape drive to an Emulex TC02 qbus tape
controller in a pdp-11/53. The interface is pertec with 2 50 pin cables.
When I use a pair of short flat ribbon cables, 18 and 30 inches each, it
works. Under RT11 I can INIT, Copy, DUMP, do a Directory.
It doesn't work when I use a pair of 5 foot long flat ribbon cables.
Are they too long? Do I need twisted pair type of cable? Is it
possibly a termination problem?
More information about the cctalk