Phil

I'd like to e-mail you direct, but my terribly clever MS Exchange system doesn't
 show your address. Could you e-mail me directly?

Apologies to everyone else for wasting their bandwidth!

john.midgley@enorfolk-ha.anglox.nhs.uk

-----Original Message-----
From:   c=gb;a=nhs;p=nhs national int;dda:RFC-822=PICLIST(a)MITVMA.MIT.EDU;
Sent:   28 January 1998 10:23
To:     c=gb;a=nhs;p=nhs national int;dda:RFC-822=PICLIST(a)MITVMA.MIT.EDU;
Subject:        Re: quadrature encoders for telescope automation

>> I am building a computer control system
>> for a 1-tonne astronomical optical telescope.
>
>Cool. Whereabouts? I'm in cycling distance of the RGO.


The scope is sited at the Seething Observatory, about 8 miles south of
Norwich. If you are in the area one friday night... please feel free to
visit us. Let me know and I'll send you the address and instructions on how
to get there!

>Someone else suggested using the Hewlett-Packard HCTL2016.
>
>They do look neat, and for a one-off design this could be
>the most labour-effective solution.

What does the 2016 do. Does it just pre-process the quad pulses or does it
count them as well?

>A friend (ex-radio astronomer) and I were discussing
>automating scopes. He said there was a neat chip
>called a Universal Pulse Processor (UPP) that looked
>ideal for jobs like that. The only snag was it was
>single-sourced. From Hitachi, I think.

Could you get the part number for me?

Thanks

Phil