[time-nuts] LTE-Lite module
SAIDJACK at aol.com
SAIDJACK at aol.com
Sat Oct 18 17:40:46 EDT 2014
Dave, et.al.,
upon popular request I put together a PDF of my email describing how I
generated a low-phase-noise 10MHz output from the CMOS 20MHz output of the
LTE-Lite GPSDO. Here it is.
No guarantees whatsoever guys, and it does take good equipment, a very
steady hand, and a lot of experience to put this together and make it work
properly.
This design can work up to 145MHz according to the 74LVX74 datasheet if
powered at 3.3V.
bye,
Said
In a message dated 10/18/2014 14:09:54 Pacific Daylight Time,
kc0wjn at gmail.com writes:
Hi, Said.
I would be interested in having a copy of your "app-note", if that is
possible. I'd like to purchase one of the GPSDOs, but will need to wait
for amonth or so.
Thanks.
Cheers,
DaveD
On 10/18/2014 12:19 PM, S. Jackson via time-nuts wrote:
> Hi guys,
>
> lots of questions, let me try to answer some of these. Bob, David, et.
al,
> thanks for answering some of these already!
>
> Dave, as Bob said "it depends on your application" -- and your time
frame.
> Also, please check the FAQ for an answer on the external TCXO
requirement,
> specifically item 35. in the FAQ on the Ebay website for the product.
>
> Jim, I ended up doing the "appnote" in email format, and sending out a
> description, schematics, PN plot, and photos yesterday, please check
your
> emails. I won't do a formal appnote, sorry no time.. I hope the
description of
> what I wired-up yesterday is good enough for folks to try the same.
>
> Ernie, as mentioned here the price is $185 plus shipping on Ebay for the
> entire kit. Shipping is calculated by Ebay, and should be a flat-rate
of $10
> in the continental US
>
> Hal, MY BAD!! I should have known better and super-imposed both the
> original 20MHz and 10MHz plots on the same plot. I will do so shortly.
On the
> table in the plot: the TimePod tries to determine spurs, and display
them on
> the upper right hand of the plot in a table, and with the phase noise
being
> as clean as it is I guess the TimePod software could only find two spurs,
> one at 0.8 and one at 0.9Hz offset from carrier, which was not even
shown in
> that plot since it starts at 1Hz.
>
> Thanks so much for your feedback, lively discussion, and good questions
> guys.
>
> I hope that answers all questions,
> bye,
> Said
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Divider_description.pdf
Type: application/pdf
Size: 334973 bytes
Desc: not available
URL: <http://www.febo.com/pipermail/time-nuts/attachments/20141018/70706bba/attachment-0001.pdf>
More information about the time-nuts
mailing list