[time-nuts] Aging 5065A ?

[Mike Feher]

So, you are increasing the length of the accumulator. What about the D/A then? 73 - Mike 

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
848-245-9115

-----Original Message-----
From: time-nuts <time-nuts-bounces at lists.febo.com> On Behalf Of Bob kb8tq
Sent: Wednesday, October 7, 2020 1:55 PM
To: Discussion of precise time and frequency measurement <time-nuts at lists.febo.com>
Subject: Re: [time-nuts] Aging 5065A ?

Hi

The “normal” 32 bit DDS chips only get you just so far in terms of tuning resolution.
If you want to run a fixed / well regulated C Field, a DDS with (say) 48 bits would allow you to tune the device well past  parts in 10^-15. There are several DDS chips out there that will do this. Some of the more common ones ( = what you see on eBay) have issues ….

Bob

> On Oct 7, 2020, at 12:11 PM, Mike Feher <mfeher at eozinc.com> wrote:
> 
> Just curious Bob. What do you mean by higher resolution? Would that be 
> a longer accumulator and more bits in the D/A? 73 - Mike
> 
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell NJ 07731
> 848-245-9115
> 
> -----Original Message-----
> From: time-nuts <time-nuts-bounces at lists.febo.com> On Behalf Of Bob 
> kb8tq
> Sent: Wednesday, October 7, 2020 11:11 AM
> To: Discussion of precise time and frequency measurement 
> <time-nuts at lists.febo.com>
> Subject: Re: [time-nuts] Aging 5065A ?
> 
> Hi
> 
> Yup, Bert has lashed up at least one that way ( I have it here in the basement).
> I am working on a board with a higher resolution DDS than the typical eBay parts.
> 
> Bob
> 
> ions there.
> 
> 
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