sloderb@mailer.cc.fsu.edu (Mike Sloderbeck) (04/15/91)
My dealer just sent me a 10' cable (scsi (centronics) 50pin each end) made out of ** ribbon cable **. Surely, lines must be twisted for a scsi cable of this length? Who's right, me or the dealer? Thanks -- Mike Sloderbeck, FSU Department of Biological Science sloderb@mailer.cc.fsu.edu
feustel@netcom.COM (David Feustel) (04/16/91)
How much are you willing to pay for the twisted pair version of the cable? -- David Feustel, 1930 Curdes Ave, Fort Wayne, IN 46805, (219) 482-9631 EMAIL: netcom.com
dtb@adpplz.UUCP (Tom Beach) (04/16/91)
In article <1991Apr15.131049.4752@mailer.cc.fsu.edu>, sloderb@mailer.cc.fsu.edu (Mike Sloderbeck) writes: > My dealer just sent me a 10' cable (scsi (centronics) 50pin each end) > made out of ** ribbon cable **. Surely, lines must be twisted for a scsi > cable of this length? Who's right, me or the dealer? > YES! The SCSI spec allows either. It's an interesting point whether the twisted pairs are better than the shorter wires you get with a standard ribbon. Whether you'll have any problems with 10' of this stuff depends on how fast you're running, how good your terminations are, whether you're running synchronous or asynchronous, ... . I have run systems with multiple devices on 10' of ribbon cable with no problems. These systems are based on the Motorola 88000 RISC processor set and have and Interphase high performance Dual SCSI controller. It's a high performance system. I do have good active terminators. I've also used the "twist and flex" twisted pair ribbon cables. They work well also and are A LOT easier to manage in a crowded peripherals bay!! Tom