[time-nuts] LTE-Lite module
SAIDJACK at aol.com
SAIDJACK at aol.com
Sat Oct 18 17:40:46 EDT 2014
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
This design can work up to 145MHz according to the 74LVX74 datasheet if
powered at 3.3V.
In a message dated 10/18/2014 14:09:54 Pacific Daylight Time,
kc0wjn at gmail.com writes:
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.
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.
> thanks for answering some of these already!
> Dave, as Bob said "it depends on your application" -- and your time
> Also, please check the FAQ for an answer on the external TCXO
> 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
> emails. I won't do a formal appnote, sorry no time.. I hope the
> 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
> 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.
> table in the plot: the TimePod tries to determine spurs, and display
> the upper right hand of the plot in a table, and with the phase noise
> 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
> that plot since it starts at 1Hz.
> Thanks so much for your feedback, lively discussion, and good questions
> I hope that answers all questions,
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