[time-nuts] Re: PPS latency? User vs kernel mode

2021-12-12 Thread Javier Herrero
Hello, I have not tried with Raspberry (and would not...), but in order to avoid interrupt latencies and jitter, my approach, using a Zynq, is: - To implement a counter in the FPGA for use as the Linux clock source, instead of the ARM timer - Implement harware timestamping on the PPS, and

[time-nuts] Re: Potting compound advice needed

2021-11-11 Thread Javier Herrero
Hello, Probably Mupsil was a typo. Mapsil 213B is a silicone-based coating also approved (at least by ESA) for space applications. Regards, Javier On 11/11/21 5:56, Lux, Jim wrote: On 11/10/21 5:31 PM, Gerhard Hoffmann wrote: A customer of mine uses Solitane, another one Mupsil. I just

[time-nuts] Re: Failed HP 58503A VFD Segments

2021-09-26 Thread Javier Herrero
Hello, Since the display is quite similar to the 34401A one (and some other units of that era), it probably will use the same driver IC, SN75518 Regards, Javier On 26/9/21 21:03, ed breya wrote: There should a number of types. I looked in the manual for my Gigatronics 7200, which has VFDs

Re: [time-nuts] An Other Ublox 8

2021-01-28 Thread Javier Herrero
Hello, On 28/1/21 11:05, Trent Piepho wrote: On Thu, Jan 28, 2021 at 1:34 AM Javier Herrero wrote: I have been playing lately with the M8F, but did not had a detailed look to the 30.72MHz frequency as John did. I have used it along with a Zynq-based board (a very unexpensive surplus EBAZ4205

Re: [time-nuts] An Other Ublox 8

2021-01-28 Thread Javier Herrero
Hello, I have been playing lately with the M8F, but did not had a detailed look to the 30.72MHz frequency as John did. I have used it along with a Zynq-based board (a very unexpensive surplus EBAZ4205, that can be get for ~10 EUR) to made an ntp server, replacing the kernel clocksource from

Re: [time-nuts] Help with 5370B and Beaglebone replacement board

2021-01-26 Thread Javier Herrero
Hello, Skip, I have one of these, in a 5370A, and have been playing with it lately. I start the 5370d application in the beaglebone with the -hpib-net flag, so HPIB commands can be sent and results get at port 5370. If you send the HPIB command MD4, the 5370 will start sending the results,

Re: [time-nuts] (no subject)

2020-05-12 Thread Javier Herrero
-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. -- - Javier Herrero Chief Technology Officer

Re: [time-nuts] Hetrodyning concept

2020-04-27 Thread Javier Herrero
ctions there. -- - Javier Herrero Chief Technology Officer EMAIL: jherr...@hvsistemas.com HV Sistemas S.L. PHONE: +34 949 336 806 Teide 4, NĂșcleo 1 Of. 0.1

Re: [time-nuts] High accuracy temp controller ckt

2019-07-12 Thread Javier Herrero
rkby, ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. -- ----- Javier Her