[time-nuts] Eureka, no more Cs, active or passive H-masers or GPSDOs needed

Azelio Boriani azelio.boriani at screen.it
Wed Sep 10 15:53:42 EDT 2014

Rb sources are considered too expensive here in Italy for the TV
broadcast market. The patent was issued by a small company that
produces digital TV transmitters able to exploit the single frequency
network specifications of the ETSI standard and so a stable and
accurate time and frequency source is needed: usually a GPSDO with an
OCXO at its heart. Very rarely do we see a disciplined Rb.

On Wed, Sep 10, 2014 at 9:18 PM, Dr. David Kirkby (Kirkby Microwave
Ltd) <drkirkby at kirkbymicrowave.co.uk> wrote:
> On 10 Sep 2014 17:36, "Brian Lloyd" <brian at lloyd.aero> wrote:
>> On Wed, Sep 10, 2014 at 9:42 AM, Azelio Boriani <azelio.boriani at screen.it>
>> wrote:
>> I skimmed through the patent but did not read it in
>> detail. There may be some nugget in there that represents something new
> but
>> nothing jumped out at me.
> Maybe that is the trick to make money out of a good patent - make 99% of it
> rubbish,  with the nugget well hidden. Then sue when people breach your
> patent.
> I looked but it is so boring and so badly written. I did learn one though -
> I thought Rb sources were used commercially,  but according to that patent
> they are too expensive for that.
> Dave
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