Darrell Robinson wrote: > In the January 2007 issue of Microwaves & RF magazine I see a paragraph or > two about a GPS disciplined frequency source. > The company is NavSync and the module is part number CW46. The stated price > is $176 if you are buying 1000 of them. > I don't know what one unit would cost, ($220?) but the price seems very > reasonable to me for what it does. > As a newbie to this, I would like to read comments as to whether this is a > good way to go for an accurate 10MHz source. > I'm looking to get +- 1 Hz at 1GHz. Their website is at www.navsync.com. > > Thanks in advance - Darrell > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > Darrell
This module uses a numerically controlled oscillator (NCO) to produce the 10MHz output frequency. An NCO has lots of output jitter and corresponding phase noise. It is necessary to use a PLL and a low noise OCXO to cleanup the output signal before it is of much use as a frequency standard for RF applications. The resultant circuit is probably no less complex than the traditional approach of locking an OCXO to a timing receiver's PPS output. Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts