Serial problems on DecStations?
Steve Watt
steve at wattres.UUCP
Sat Feb 17 19:39:20 AEST 1990
In article <422 at wattres.UUCP> I wrote:
>I was trying to get a Ventel Pathfinder 18K up on a DecStation 3100 running
I have discovered why this doesn't work: If you hang an oscilloscope off of
the serial port on the DECStation 3100, you see a voltage swing of -5v to +5v
!!! I realize that this is "officially" allowed in RS232-C, (but not -D), but
the "usually accepted" value is somewhere around +-12v. The VAXStation 3100,
incidentally, swings +-10v, which works OK. My portable swings +-8v, which
also works.
Does anybody know if there is some way to coax more voltage swing out of these
things, or do I get to do some electronic design? (Like buying from SGI? :)
--
Steve Watt
...!claris!wattres!steve wattres!steve at claris.com is reported to work.
Is rm -rf a way to remove high-frequency noise? (No names mentioned! :-)
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