http://sitesperso.obs-besancon.fr/~emeyer/CAN/ 2026-04-16T03:41:18+0200 http://sitesperso.obs-besancon.fr/~emeyer/CAN/ http://sitesperso.obs-besancon.fr/~emeyer/CAN/lib/tpl/20cones/images/favicon.ico text/html 2014-06-18T11:23:28+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:about&do=revisions&rev=1403083408 About this website This site is under construction by Eric Meyer. I'm not good in programming. I'm just adapting things to the pusrpose af this website. I would like to say thank you each one have made some part of this site. Acknowledgments Dokuwiki community text/html 2016-10-11T15:42:14+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:contact&do=revisions&rev=1476193334 General contact email <contact@first-tf-can.utinam.cnrs.fr> Community's steering committee Michel LOURS michel.lours at obspm.fr Pierre-Yves BOURGEOIS pierre-yves.bourgeois at femto-st.fr Fabrice Wiotte fabrice.wiotte at univ-paris13.fr Eric Meyer emeyer at utinam.cnrs.fr text/html 2014-06-17T16:15:51+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:contribute&do=revisions&rev=1403014551 Contribute If you are part of First-TF network, you can contribute to this comunity. To di that, write to one person of the steering comity to ask for your inscription. After that, you can access to the knowlage base and contribute to its richness. You will be able to be a part discution groups, too. text/html 2017-05-22T10:06:28+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:dds&do=revisions&rev=1495440388 Direct Digital Synthesizer Direct Digital Synthesizers (DDS) are frequency synthesizers creating variable frequency arbitrary waveforms from a single, fixed-frequency reference clock. Many kinds of designs are used. Useful links A good tutorial about the designs of DDS is here : text/html 2016-03-14T14:35:46+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:dds_applications&do=revisions&rev=1457962546 DDS applications Generators RF low noise RF antennas RF Skin of magneto-optical trap acousto-optic pilot phase locked loop Local oscillator ... Edit Advantages Frequencies generated by internal divisions phase continuity and limitation of spectrum text/html 2016-03-14T08:44:27+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:example_of_development_around_the_ad9959_dds&do=revisions&rev=1457941467 I will introduce an electronic development based on a DDS, the AD9959 . The latter has been used as part of the electronics of the repeater stations developed for REFIMEVE + project. to the laboratory LPL for a research team working on a condensed atoms we developed an electronic -based multiple DDS ( AD9959 ) , see below : text/html 2016-03-14T14:29:51+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:programs_to_communicate_with_the_dds&do=revisions&rev=1457962191 Interface with TI microcontroller: the MSP430 Sample program in C written in the microcontroller MSP430F169 this microcontroller has 2 SPI ports. SPI mode: Single-bit serial 2-wire Mode (default mode) initialization and loading of CSR and CFTW0 records: text/html 2014-06-18T14:30:00+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:sidebar&do=revisions&rev=1403094600 * DDS * NCO * Correlators * Digital noises : * phase noise * jitter * time stabitlity * Time to Digital Converters * Synchronous Detection * ADC/DAC choice for Time and Frequency * Measures of Sphi(f) & sigma_y(tau) * Timing in networks text/html 2017-06-01T16:23:11+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:start&do=revisions&rev=1496326991 Around Digital Community for First-TF The purpose of the community is to : * knowledge sharing around digital systems and designs related to First-TF. * promote First-TF projects. News 2017 European Frequency and Time Seminar (EFTS) Monday, June 26 - Friday, June 30, 2017 Besançon, France - Femto-ST Institute, ENSMM site text/html 2016-03-14T08:22:03+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:the_principle_of_operation_of_a_dds&do=revisions&rev=1457940123 A note explaining the operation of DDS is located here: text/html 2014-06-18T14:31:21+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:topics&do=revisions&rev=1403094681 * DDS * NCO * Correlators * Digital noises : * phase noise * jitter * time stabitlity * Time to Digital Converters * Synchronous Detection * ADC/DAC choice for Time and Frequency * Measures of Sphi(f) & sigma_y(tau) * Timing in networks text/html 2017-06-01T16:22:21+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:training&do=revisions&rev=1496326941 Monday, June 26 - Friday, June 30, 2017 2017 European Time & Frequency Seminar - EFTS The EFTS is intended to provide education and training, including laboratory practice in a full-week seminar, and targets the broadest audience: Engineers, Ph.D. students, post-docs, young scientists, newcomers, etc. text/html 2016-03-14T14:34:09+0200 Anonymous (anonymous@undisclosed.example.com) http://sitesperso.obs-besancon.fr/~emeyer/CAN/doku.php?id=en:various_programming_mode&do=revisions&rev=1457962449 Two types of programming : SPI serial mode or parallel mode. Some DDS sometimes offer possibility be programmed in serial mode (10 MHz serial 2 -wire or 3 -wire SPI- compatible) or in parallel mode (100 MHz 8-bit parallel programming) as shown in the datasheet of the AD9852 .