[time-nuts] New Timestamping / Time Interval Counter: the TICC

[timeok]

   Hi Li,
   can you share more info about your project?
   Luciano
   www.timeok.it


   From "time-nuts" time-nuts-bounces at febo.com
   To "Discussion of precise time and frequency measurement" time-nuts at febo.com
   Cc
   Date Sat, 26 Nov 2016 13:16:34 +0800
   Subject Re: [time-nuts] New Timestamping / Time Interval Counter: the TICC
   Great job.

   I am doing a similar project too.
   I've just sent gerber/pos/bom files to the PCB&SMT company. 3 tdc7200s are used on my board to support the 3-corner-hat measurement.

   Regards
   Li Ang

   ---Original---
   From: "John Ackermann N8UR"<jra at febo.com>
   Date: 2016/11/25 22:57:33
   To: "Discussion of precise time and frequency measurement"<time-nuts at febo.com>;"David"<mcquate at sonic.net>;
   Subject: Re: [time-nuts] New Timestamping / Time Interval Counter: the TICC


   Hi Dave --

   I should clarify -- this UI is just a character-based menu system using
   a dumb terminal program. The code is implemented within the Arduino.

   It's written in the somewhat nonstandard C/C++ used by the Arduino IDE.
   This morning I'm going to add a "TODO-UI" file to the git repository
   explaining what the menu system needs to do.

   TimeLab is able to read the data stream and plot results in real-time,
   so there's no urgent need for software on the host end. But I do need
   to allow the user to set a number of configuration parameters without
   having to recompile the code, so that's the urgent goal.

   Thanks!
   John
   ----
   On 11/25/2016 03:26 AM, David wrote:
   > John,
   >
   > In what language is the GUI written? I might be able to help on
   > that, or other parts of the software, if someone else hasn't yet
   > volunteered.
   >
   > Dave, WA8YWQ
   >
   > On 2016-11-24 06:43, John Ackermann N8UR wrote:
   >
   >> Hi Anders --
   >>
   >> Thanks, and thanks for the info on the 53230A. I have not used one of
   >> those myself but the data sheet lists 20ps single-shot.
   >>
   >> Also I should note that the TICC does not compete with counters like
   >> the 53230A for high speed measurement, or frequency counting. It does
   >> far fewer measurements per second than the high-end counters -- my
   >> design criteria was for use in PPS measuring system.
   >>
   >> With the current software, the actual measurement processing time is
   >> about 1 millisecond; we may be able to optimize a hundred or two
   >> microseconds from that as the code currently has more 64 bit
   >> operations than are necessary, and there are other things that can
   >> surely be tweaked.
   >>
   >> The killer is the serial output via USB. It can take up to 10 ms to
   >> output 20 characters, and that's what really limits the measurement
   >> rate. I'm pretty sure this can be improved (one idea is to buffer
   >> results to reduce USB packetization delays), but there's other
   >> functionality that I need to finish first.
   >>
   >> BTW -- the software is open source and on github at
   >> https://github.com/TAPR/TICC , so I welcome anyone who wants to work
   >> on it. Bug fixes are gladly accepted, and if you're looking for work
   >> to do, I could use a volunteer to work on a couple of areas, most
   >> critically finishing a UI that will allow the user to set operating
   >> parameters.
   >>
   >> John
   >> ----
   >> On 11/24/2016 02:40 AM, Anders Wallin wrote:
   >>> Nice work!
   >>> On the website in the introduction you mention 22ps single-shot
   >>> time-stamping on the 5370A/B.
   >>> I think it's well established that the 53230A does about 11-12 ps for
   >>> time-intervals, which corresponds to about 9 ps single-channel. see for
   >>> example:
   >>> http://www.anderswallin.net/wp-content/uploads/2015/04/53230A_PPS_skew.png
   >>>
   >>> Anders
   >>>
   >>>
   >>> On Wed, Nov 23, 2016 at 11:13 PM, Peter Vince <petervince1952 at gmail.com
   >>> <mailto:petervince1952 at gmail.com>>
   >>> wrote:
   >>>
   >>>> Fantastic John - well done! Yes, I'll definitely put an order in as soon
   >>>> as possible.
   >>>>
   >>>> Regards,
   >>>>
   >>>> Peter (G8ZZR, London)
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