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From: info-vax@ucbvax.ARPA
Newsgroups: fa.info-vax
Subject: A/D Converters for Vax 11/730
Message-ID: <5679@ucbvax.ARPA>
Date: Thu, 21-Mar-85 16:02:08 EST
Article-I.D.: ucbvax.5679
Posted: Thu Mar 21 16:02:08 1985
Date-Received: Fri, 22-Mar-85 02:44:12 EST
Sender: daemon@ucbvax.ARPA
Organization: University of California at Berkeley
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From: Jorgen_Pihl%QZCOM.MAILNET@MIT-MULTICS.ARPA

The 730 is a Unibus machine, so there are several options.
If you want to go the DEC way, you could use an ADF01 300 kHz
12 bit converter.  Or you could order a system from Data Translation,
with 12 or even 16 bits resolution, at 100 kHz.

Note that you need a DMA interface.Not even RSX is happy with
7000 interrupts per second, and VMS would be even unhappier.

The DMA should also have multiple buffers, in order to avoid
gaps in the A/D sampling.

The LPA was (is) certainly a wounderful unit. I have it on two
RSX systems. It samples data at 150 kHz with very little noticable
CPU load.