Re: [time-nuts] vectron to be acquired by MicroSemi

Hi, It has become a colossus. And market competition? Luciano. www.timeok.it Da "time-nuts" time-nuts-boun...@febo.com A "Discussion of precise time and frequency measurement" time-nuts@febo.com Cc Data Fri, 27 Oct 2017 20:14:01 -0400 Oggetto Re: [time-nuts] vectron

Re: [time-nuts] vectron to be acquired by MicroSemi

Hi In terms of what Vectron actually manufacturers, there isn’t a *lot* of overlap with Microsemi. Compared to a a lot of possible matchups this one does not have to many things to work out. They both do a bit in space and they both do GPSDO’s. Past that, the other stuff is not in markets or tech

Re: [time-nuts] Designing an embedded precision GPS time

> From: Attila Kinali > Can you tell a little bit how your device looks like on the inside? GPS is a Ublox. MCU is Cortex-M7 and does not run any OS - just main loop with prioritised interrupts. Network stack is hand-made. I don't use saw-tooth correction in this device because +-11ns is not

Re: [time-nuts] Spice simulation of PSRR and phase noise

Hi Attila, On 27-Oct-17 8:25 PM, Attila Kinali wrote: Hi Rafael On Sun, 22 Oct 2017 17:20:52 +0200 Rafael Gajanec wrote: you haven't specified what sort of circuits would you like to simulate, Simplified, they are differential amplifiers driven into saturation. A bit more detailed, I am loo

Re: [time-nuts] Spice simulation of PSRR and phase noise

Hi The “fun part” of harmonic balance is making sure you are not off in a corner case where the results are not as good as they might otherwise be. Maybe not as much an issue for a VCO as for some other structures. Bob > On Oct 28, 2017, at 7:36 AM, Rafael Gajanec wrote: > > Hi Attila, > > O

Re: [time-nuts] vectron to be acquired by MicroSemi

On 10/28/17 6:19 AM, Bob kb8tq wrote: Hi In terms of what Vectron actually manufacturers, there isn’t a *lot* of overlap with Microsemi. Compared to a a lot of possible matchups this one does not have to many things to work out. They both do a bit in space and they both do GPSDO’s. Past that, th

[time-nuts] chrony vs ntpd

Now that I have successfully connected my GPS receiver to my beagle and I'm getting pps ticks into the driver, etc. (thanks to info from several folks on this list!) the question arises of whether to use ntpd or chrony. For my particular application, I'm more interested in synchronizing time o

Re: [time-nuts] vectron to be acquired by MicroSemi

Hi To some extent, companies are acquired for their heritage / IP. That can give a pretty strong push towards hanging on to all the old files and designs. Certainly that’s been the case with Vectron (and with McCoy, Piezo, Ovenair, Telequartz, Oscillatek, ….) through multiple passes at this. B

[time-nuts] Spice simulation of PSRR and phase noise

And it's the only way to be sure... never trust a simulation, particularly for such flighty and subtle things like noise. Simulations can be useful for pointing you in the right direction for a design, but where the rubber meets the road there is nothing like real hardware to get to the true

Re: [time-nuts] chrony vs ntpd

Jim, I thought about using an RF-input sync pulse for alignment during the Solar Eclipse measurement experiment, but ended up running out of time to implement it. But some very crude experiments indicated that it's not hard to generate an edge out of a PPS that creates a comb well past HF. My

Re: [time-nuts] vectron to be acquired by MicroSemi

For those of us who tend to use legacy, older products, perhaps spares or surplus (time-nuts list members, and flight hardware designers alike), this can present a problem. (Because *we* are also faced with pressure to dispose of all that old paper and records, either from cohabitants or manage

Re: [time-nuts] chrony vs ntpd

On 10/28/17 10:34 AM, John Ackermann N8UR wrote: Jim, I thought about using an RF-input sync pulse for alignment during the Solar Eclipse measurement experiment, but ended up running out of time to implement it.  But some very crude experiments indicated that it's not hard to generate an edge o

Re: [time-nuts] Designing an embedded precision GPS time server

That looks and sounds very, very much like what I want to do. Thank you very much for your testing suggestions. When it comes time, I had indeed planned on adding it to the NTP pool if for no other reason than to contribute to the cause (but also for testing). I believe I’m going to start with

[time-nuts] Sulzer 2.5 Re-listed

I re-listed the Sulzer 2.5.  I had to edit the listing. Richard ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] chrony vs ntpd

I don't know much about chrony. jim...@earthlink.net said: > Now that I have successfully connected my GPS receiver to my beagle and I'm > getting pps ticks into the driver, etc. (thanks to info from several folks > on this list!) the question arises of whether to use ntpd or chrony. If you ar

Re: [time-nuts] chrony vs ntpd

Would a step recovery diode be better? for example http://www.mwrf.com/analog-semiconductors/designing-step-recovery-diode-based-comb-generator Don On 2017-10-28 12:20, jimlux wrote: On 10/28/17 10:34 AM, John Ackermann N8UR wrote: Jim, I thought about using an RF-input sync pulse for alignmen

Re: [time-nuts] chrony vs ntpd

On 10/28/17 2:25 PM, djl wrote: Would a step recovery diode be better? for example http://www.mwrf.com/analog-semiconductors/designing-step-recovery-diode-based-comb-generator Maybe, but that's starting to increase the complexity. I've used various and sundry harmonic mixers using SRDs (ak

[time-nuts] NEO-7M various modes

I've got 4 NEO-7M-C modules hooked up to 7 beaglebone greens, side by side, and they're not behaving the same.. I've got gpsd running, and I'm looking at the output of cgps and/or gpsmon, as well as ppstest Some emit NMEA sentences, others binary (ublox?) strings? Some get a fix and start t

Re: [time-nuts] NEO-7M various modes

uBlox has a utility called u-center that's a free download. You can use it to configure the various output options (and enable and disable different messages) and a then save this config back to the module as the start up default. Wayne On Sat

Re: [time-nuts] Designing an embedded precision GPS time server

I built a couple of NTP time servers around this board: https://www.olimex.com/Products/ARM/ST/STM32-E407/open-source-hardware which supports IEEE1588. It also acts as a PTP source on the LAN. It is part of the IPv6 ntp pool and is currently serving about 1000 requests per minute. It uses a cus

Re: [time-nuts] NEO-7M various modes

On 10/28/17 3:24 PM, Wayne Holder wrote: uBlox has a utility called u-center that's a free download. You can use it to configure the various output options (and enable and disable different messages) and a then save this config back to the mod

[time-nuts] NEO-7M various modes

Lady Heather will also work with the Ublox modules and can be used to configure the units. Heather can easily be compiled to run under Linux/macOS/freeBSD. You might have the SNR and/or elevation mask filters set improperly for indoor operation. ___

Re: [time-nuts] NEO-7M various modes

See the -b and -n options to gpsctl. Also the -b option to gpsd. > On Oct 28, 2017, at 15:12, jimlux wrote: > > Some emit NMEA sentences, others binary (ublox?) strings? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://w