On Monday 20 May 2002 23:22, you wrote:
> On Mon, 2002-05-20 at 22:55, Matthew Sackman wrote:
> > Yep, mine's arrived and is working fine. However, the cable is an
> > unterminated affair (50 pin IDC). No manual for the tape drive.
> > There's one jumper on it marked "TP". Does one think that that enables
> > or disables internal termination or does it have nothing to do with
> > termination? Any ideas at all?
>
> TP Means Terminator Power, I.E. the drive will feed 5 volts to the SCSI
> bus to power a terminator at the end of the cable. Usually the SCSI
> controller will put power on the bus, but if you have a long SCSI chain
> it would probably more appropriate to enable TP on the last drive just
> before the terminator. There is usually another jumper labelled TE
> (Terminator Enable) or are there may be sockets for single in-line
> terminator (resistor) packs.
As far as I understood the terminators provide the correct capacitance, to
terminate the bus, and active powered ones are preferred as they are more
accurate and reliable.
To be sure, previous poster would do well to find the SCSI FAQ with google,
there's a mine of info on various types, and pitfalls.
Rob
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