News

Hardware and VHDL design notes published

Added by Tomasz Wlostowski on 09 Jul 2013 at 19:31

An engineer-to-engineer note describing the hardware and VHDL design of the Fine Delay has been published. It provides a lot of information on the internals of the FD card, calibration techniques, White Rabbit implementation, Acam's TDC and programming the card's registers.

09-01-2013: 70 Fine Delay FMC cards shipped

Added by Erik van der Bij on 08 Jan 2013 at 16:38

INCAA Computers in the Netherlands has produced and tested seventy Fine Delay FMC cards. These cards have a resolution better than 1 ns.

15 V3 boards built

Added by Erik van der Bij on 30 Mar 2012 at 13:23

A small series of the Fine Delay module board has been built to be used in tests for CNGS to help in measuring precisely the speed of neutrinos. One board will be reserved to be used in a prototype setup for the LHC kicker magnets. It was V3 that has been built, V4 will have a slightly different output stage.

02-03-2012: review of V4 held

Added by Erik van der Bij on 02 Mar 2012 at 10:24

A schematics and PCB review had been held for the V4 of the fine delay FMC module. During the review we made suggestions that improve the reliability of the board and will make it more safe to use when no terminations are used on the output signals. Once the modifications are made, CERN will order 40 boards.

02-09-2011: V2 works

Added by Tomasz Wlostowski on 02 Sep 2011 at 16:42

The just-arrived V2 prototype was confirmed to work with the new VHDL firmware on a SPEC card. See Measurements for details.

31-08-2011: Received V2 boards

Added by Erik van der Bij on 31 Aug 2011 at 14:51

We received assembled prototypes of V2 of the fine delay module. The firmware for the Fine delay module on a SPEC card is being developed and should be ready for demonstration in around two weeks time.

18-03-2011: Production files V1 ready

Added by Erik van der Bij on 21 Mar 2011 at 18:03

CERN's design office reviewed the PCB layout and generated the production files that are in the same format as over 2000 other CERN designs.

03-02-2011: PCB assembled and powered up

Added by Tomasz Wlostowski on 03 Feb 2011 at 21:14

One prototype PCB has been assembled in our lab and immediately powered up. All power supplies are correct and the board's I2C peripherals respond.

18-01-2011: PCB layout received for review.

Added by Erik van der Bij on 19 Jan 2011 at 13:42

The PCB layout has been received for review. It will be reviewed within a day and then quickly three prototypes will be built. In parallel the design will be reviewed by CERN's design office and complete production files will be generated so that the design will be easier to be built by industry.

15-06-2010: Functional system specification review held.

Added by Erik van der Bij on 15 Jun 2010 at 17:19

A review of the functional system specification has been held. It resulted in some minor clarifications and in the simplification that input pulses will be ignored until the previous input pulse delay has expired.

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