[time-nuts] Neat looking DMTD unit on eBay

[Bob kb8tq]

Hi

All of the divide by 2 stuff and the frequency counter on the input would make more
sense with a DFF as a mixer. It also might explain the use of a 3V CMOS signal as
the “standard input”. 

It may all be in an FPGA. 

One thing missing in the info - can the LO be tuned at all? If not, you will have to be right 
on whatever frequency it’s set to. Those same de-glitch filters will get you if you aren’t.

Bob

> On Apr 22, 2019, at 3:46 PM, Bruce Griffiths <bruce.griffiths at xtra.co.nz> wrote:
> 
> The mention of deglitching after the mixers perhaps indicates that the mixers may be flipflops and that the device is perhaps a DDMTD. Alternatively the block diagram is intentionally misleading.
> 
> Bruce 
>> On 23 April 2019 at 03:11 cdelect at juno.com wrote:
>> 
>> 
>> Hi,  
>> 
>> A friend directed me to this listing. Nice looking DMTD unit.
>> Low power and compact!
>> Has anyone played with one of these yet?
>> 
>> https://www.ebay.ca/itm/123728915157?ul_noapp=true
>> 
>> Cheers,
>> 
>> Corby
>> 
>> 
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