Sync to 1 pps but will not discipline the frequency source Lester B Veenstra MØYCM K1YCM [email protected] [email protected] [email protected] US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Telephones: Office: +44-(0)1423-846-385 Home: +44-(0)1943-880-963 Guam Cell: +1-671-788-5654 UK Cell: +44-(0)7716-298-224 US Cell: +1-240-425-7335 Jamaica: +1-876-352-7504 This e-mail and any documents attached hereto contain confidential or privileged information. The information is intended to be for use only by the individual or entity to whom they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this e-mail or any documents attached hereto is prohibited.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of christopher hoover Sent: Thursday, June 11, 2009 5:26 AM To: [email protected] Subject: [time-nuts] AD9548 - Clock IC Generates Up to 400 MHz from 1 PPSGPS Signal [fyi -- this may be of general interest, but n.b. that this A.D. marketing - ch] Clock IC Generates Up to 400 MHz from 1 PPS GPS Signal The AD9548 <http://www.analog.com/en/clock-and-timing/clock-generation-and-distribution /ad9548/products/product.html> is the first clock chip in the industry to directly generate up to a 400 MHz output clock, with extremely low phase noise, that is locked to a standard one pulse-per-second (PPS) GPS clock signal. This performance is a result of combining Analog Devices' proprietary direct digital synthesis (DDS) technology with a state-of-the-art digital phase-locked loop (DPLL). Other solutions for synchronizing to the GPS 1 PPS source typically rely on one or more frequency upconversion steps. Maintaining low output noise, while providing over eight orders of magnitude of frequency scaling (1 Hz input to over 100 MHz output), is a significant challenge. The AD9548 is able to mitigate this effect thanks to a digital loop filter capable of bandwidths as low as 1 MHz (10 Hz to 3 Hz). / / _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
