[time-nuts] 5370A vs 5370B

[Bruce Griffiths]

Why bother, you can replace the entire box apart from the input signal 
conditioning with an FPGA and a pair of high resolution time interval 
interpolators (eg 2 ADCs per interpolator, or a TAC circuit like those 
used by Wavecrest.).

Bruce

Demian Martin wrote:
> I got an almost perfect 5370A some years ago for less than $100. It had one
> dead input. I discovered that those input devices were essentially
> unobtanium so I went shopping for a substitute. I found a Maxim chip that
> seems to work as well as the original comparator, possibly slightly better.
> I also found that the input was not very easy to work with. However the time
> interval probes HP 5363a or b (pretty easily available) address the input
> flexibility issues very well and seem to talk to the inputs better than I
> can directly. Its output seems to be an ecl signal.
>
> Is there anything a 5370B can do that the A version can't? It seems the
> major upgrade is the processor, the timer circuits seem essentially the
> same. In fact this suggests some enterprising time nut could design a new
> processor taking advantage of much faster and cheaper new processor chips to
> improve the throughput considerably and could sell the upgrade to all of us
> with 5370's. I would not be surprised if a PIC could do the task. . .
>           Demian
>
>
>
> Date: Tue, 9 Mar 2010 16:56:41 -0500
> From: "Bob Camp"<lists at rtty.us>
> Subject: Re: [time-nuts] 5370A vs 5370B
> To: "'Discussion of precise time and frequency measurement'"
> 	<time-nuts at febo.com>
> Message-ID:<565D26FDA92D48A89CEBE425506E1C95 at vectron.com>
> Content-Type: text/plain;	charset="us-ascii"
>
> Hi
>
> Assuming there's enough of the pot left, (as in the pot still works) that's
> very likely what I'll do.
>
> Bob
>
> ********
>
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>