Bill wrote....
I think (It's a long time since my '86 DEC
Days...) there was one of the
cables between the drive and the cabinet that was kind of null modem'd.
Ah, that makes sense. That doesn't seem to be documented (cept perhaps in
the prints which I haven't looked at yet). So, how does one test (or tell)
if a given cable is non-null-modem'd or null-modem'd (with respect to SDI),
and what should it be end to end? That way I can find the right kind of
cable :)
When i'm having sdi problems I try (and this is just me) to run one
cable directly from the uda 50 to the drive. This seems to work great
for ra7x's and ra9x's. It might be a trick with an ra81 due to the bulk
(but you might be able to set them up butt to butt as it were - i just
know I'm going to regret typing that)
The rule is the # of sdi cables needs to be odd. 1 or 3.
going direct with one has always worked for me.
-brad