NDLI: 6/12-channel synchronous digital phasemeter for ultrastable signal characterization and use

Content Provider	IEEE Xplore Digital Library
Author	Massimo, C. Costanzo, G.A. Calosso, C.E.
Copyright Year	2015
Description	Author affiliation: INRIM, Politec. di Torino, Turin, Italy (Costanzo, G.A.) \|\| Ist. Nat. di Ricerca Metrol., Turin, Italy (Calosso, C.E.) \|\| Dept. of Electron. & Telecommun., Politec. di Torino, Turin, Italy (Massimo, C.)
Abstract	Nowadays, in primary time and frequency laboratories we can find high spectral purity signals in the 10 MHz - 10 GHz range generated from cryogenic oscillators or ultra-stable lasers together with frequency combs. Their short-term stability surpasses by one to two orders of magnitude the performances of active hydrogen masers (AHM), while in the long-term AHMs still have a better behavior. The new technology can be considered mature for what concern spectral purity, but we cannot say the same about complexity, power consumption and reliability. In this sense, it is important to measure ultra-stable sources with respect to AHMs. First, to test their spectral purity or, at least, to give it an upper bound; second to have a continuous monitoring; finally, to combine them in order to get the best of all in term of phase noise and frequency stability. All of these requirements can be satisfied by the system we are developing. It is a multi-channel synchronous and real-time phasemeter based on Tracking Direct Digital Synthesizer (TDDS) technique. The results related to the first prototype are presented.
Starting Page	681
Ending Page	683
File Size	1073643
Page Count	3
File Format	PDF
e-ISBN	9781479988662
DOI	10.1109/FCS.2015.7138934
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-04-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Masers Frequency measurement Phase measurement Phase noise Noise measurement Laser stability cross-variance phasemeter digital electronics DDS FPGA
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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