AK
Andreas Kempe
Fri, Apr 24, 2020 6:46 PM
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
BK
Bob kb8tq
Fri, Apr 24, 2020 8:22 PM
Hi
Assuming you can get a good sky view for the GPS / GNSS device, that’s about
all you need. Feed it into whatever computer you decide to use and move on. The
OCXO is simply a power hungry “non contributor” in this case.
Bob
On Apr 24, 2020, at 2:46 PM, Andreas Kempe kempe@lysator.liu.se wrote:
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
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.
Hi
Assuming you can get a good sky view for the GPS / GNSS device, that’s about
all you need. Feed it into whatever computer you decide to use and move on. The
OCXO is simply a power hungry “non contributor” in this case.
Bob
> On Apr 24, 2020, at 2:46 PM, Andreas Kempe <kempe@lysator.liu.se> wrote:
>
> Hello everyone,
>
> I want to build an affordable quality time source for my computer
> club. I've been toying with the idea of using an oven controlled
> oscillator from Ebay for getting a reasonable (0,5 ppm frequency
> stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
> time. I was thinking of running this on a Raspberry Pi with FreeBSD
> and its gpiopps driver.
>
> Is this a reasonable setup for an affordable NTP server?
>
> Cordially,
> Andreas Kempe
> _______________________________________________
> 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.
AK
Andreas Kempe
Fri, Apr 24, 2020 8:38 PM
On Fri, Apr 24, 2020 at 04:22:46PM -0400, Bob kb8tq wrote:
Assuming you can get a good sky view for the GPS / GNSS device, that’s about
all you need. Feed it into whatever computer you decide to use and move on. The
OCXO is simply a power hungry “non contributor” in this case.
The reason for wanting the crystal is that I'd like the time to keep
if we were to lose the GPS signal. I was thinking that an external
oscillator would be better than the one in the GPS module in the
case of a lost signal (as a side note, I just thought it would be fun
to design the circuit). Maybe that is an incorrect assumption?
Cordially,
Andreas Kempe
On Fri, Apr 24, 2020 at 04:22:46PM -0400, Bob kb8tq wrote:
>
> Hi
>
Hello Bob,
> Assuming you can get a good sky view for the GPS / GNSS device, that’s about
> all you need. Feed it into whatever computer you decide to use and move on. The
> OCXO is simply a power hungry “non contributor” in this case.
>
The reason for wanting the crystal is that I'd like the time to keep
if we were to lose the GPS signal. I was thinking that an external
oscillator would be better than the one in the GPS module in the
case of a lost signal (as a side note, I just thought it would be fun
to design the circuit). Maybe that is an incorrect assumption?
Cordially,
Andreas Kempe
TK
Taka Kamiya
Fri, Apr 24, 2020 8:43 PM
I use Garmin 18 for this purpose. It's like 80 dollars and it's smaller than a hockey puck. It includes GPS, antenna, and RS232 like interface. You MUST get LVD version. USB version and PC version does not have 1 second PPS output. It's quite sensitive. It's magnetic, so I stuck it on top of 18" rack and it's been running well for few years.
(Mr.) Taka Kamiya
KB4EMF / ex JF2DKG
On Friday, April 24, 2020, 4:23:33 PM EDT, Bob kb8tq <kb8tq@n1k.org> wrote:
Hi
Assuming you can get a good sky view for the GPS / GNSS device, that’s about
all you need. Feed it into whatever computer you decide to use and move on. The
OCXO is simply a power hungry “non contributor” in this case.
Bob
On Apr 24, 2020, at 2:46 PM, Andreas Kempe kempe@lysator.liu.se wrote:
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
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.
I use Garmin 18 for this purpose. It's like 80 dollars and it's smaller than a hockey puck. It includes GPS, antenna, and RS232 like interface. You MUST get LVD version. USB version and PC version does not have 1 second PPS output. It's quite sensitive. It's magnetic, so I stuck it on top of 18" rack and it's been running well for few years.
---------------------------------------
(Mr.) Taka Kamiya
KB4EMF / ex JF2DKG
On Friday, April 24, 2020, 4:23:33 PM EDT, Bob kb8tq <kb8tq@n1k.org> wrote:
Hi
Assuming you can get a good sky view for the GPS / GNSS device, that’s about
all you need. Feed it into whatever computer you decide to use and move on. The
OCXO is simply a power hungry “non contributor” in this case.
Bob
> On Apr 24, 2020, at 2:46 PM, Andreas Kempe <kempe@lysator.liu.se> wrote:
>
> Hello everyone,
>
> I want to build an affordable quality time source for my computer
> club. I've been toying with the idea of using an oven controlled
> oscillator from Ebay for getting a reasonable (0,5 ppm frequency
> stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
> time. I was thinking of running this on a Raspberry Pi with FreeBSD
> and its gpiopps driver.
>
> Is this a reasonable setup for an affordable NTP server?
>
> Cordially,
> Andreas Kempe
> _______________________________________________
> 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.
_______________________________________________
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To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
BK
Bob kb8tq
Fri, Apr 24, 2020 10:08 PM
Hi
A GPSDO would be the “next step” if you want to continue on when GPS
is not present. They are a < $100 sort of thing from a number of sources.
Bob
On Apr 24, 2020, at 4:38 PM, Andreas Kempe kempe@lysator.liu.se wrote:
On Fri, Apr 24, 2020 at 04:22:46PM -0400, Bob kb8tq wrote:
Assuming you can get a good sky view for the GPS / GNSS device, that’s about
all you need. Feed it into whatever computer you decide to use and move on. The
OCXO is simply a power hungry “non contributor” in this case.
The reason for wanting the crystal is that I'd like the time to keep
if we were to lose the GPS signal. I was thinking that an external
oscillator would be better than the one in the GPS module in the
case of a lost signal (as a side note, I just thought it would be fun
to design the circuit). Maybe that is an incorrect assumption?
Cordially,
Andreas Kempe
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.
Hi
A GPSDO would be the “next step” if you want to continue on when GPS
is not present. They are a < $100 sort of thing from a number of sources.
Bob
> On Apr 24, 2020, at 4:38 PM, Andreas Kempe <kempe@lysator.liu.se> wrote:
>
> On Fri, Apr 24, 2020 at 04:22:46PM -0400, Bob kb8tq wrote:
>>
>> Hi
>>
>
> Hello Bob,
>
>> Assuming you can get a good sky view for the GPS / GNSS device, that’s about
>> all you need. Feed it into whatever computer you decide to use and move on. The
>> OCXO is simply a power hungry “non contributor” in this case.
>>
>
> The reason for wanting the crystal is that I'd like the time to keep
> if we were to lose the GPS signal. I was thinking that an external
> oscillator would be better than the one in the GPS module in the
> case of a lost signal (as a side note, I just thought it would be fun
> to design the circuit). Maybe that is an incorrect assumption?
>
> Cordially,
> Andreas Kempe
> _______________________________________________
> 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.
DJ
David J Taylor
Sat, Apr 25, 2020 7:44 AM
From: Andreas Kempe
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
Andreas,
Here's an example of a simple device you can build:
https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
It's quite temperature sensitive, so either put it where the temperature is
stable, or use ntpheat to keep the CPU at a much more constant temperature:
http://www.satsignal.eu/ntp/Raspberry-Pi-ntpheat.html
With those recommendations, and noting the delays in RPi I/O (at least in
the earlier RPi cards where Ethernet is over USB), I would suggest that an
OCXO is overkill. No reason to deviate from the Raspbian OS.
You can gauge the performance from various Raspberry Pi devices here:
http://www.satsignal.eu/mrtg/performance_ntp.php
Cheers,
David
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
From: Andreas Kempe
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
_______________________________________________
Andreas,
Here's an example of a simple device you can build:
https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
It's quite temperature sensitive, so either put it where the temperature is
stable, or use ntpheat to keep the CPU at a much more constant temperature:
http://www.satsignal.eu/ntp/Raspberry-Pi-ntpheat.html
With those recommendations, and noting the delays in RPi I/O (at least in
the earlier RPi cards where Ethernet is over USB), I would suggest that an
OCXO is overkill. No reason to deviate from the Raspbian OS.
You can gauge the performance from various Raspberry Pi devices here:
http://www.satsignal.eu/mrtg/performance_ntp.php
Cheers,
David
--
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
SN
Stijn Nestra
Sat, Apr 25, 2020 8:39 AM
Regarding the temperatur sensitivity of the raspberrypi, i have replaced the xtal on several if them by a tcxo. This a hell of a difference.
Kind regards,
Stijn Nestra
Verstuurd vanaf mijn iPhone
Op 25 apr. 2020 om 09:47 heeft David J Taylor via time-nuts time-nuts@lists.febo.com het volgende geschreven:
From: Andreas Kempe
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
Andreas,
Here's an example of a simple device you can build:
https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
It's quite temperature sensitive, so either put it where the temperature is stable, or use ntpheat to keep the CPU at a much more constant temperature:
http://www.satsignal.eu/ntp/Raspberry-Pi-ntpheat.html
With those recommendations, and noting the delays in RPi I/O (at least in the earlier RPi cards where Ethernet is over USB), I would suggest that an OCXO is overkill. No reason to deviate from the Raspbian OS.
You can gauge the performance from various Raspberry Pi devices here:
http://www.satsignal.eu/mrtg/performance_ntp.php
Cheers,
David
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
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.
Regarding the temperatur sensitivity of the raspberrypi, i have replaced the xtal on several if them by a tcxo. This a hell of a difference.
Kind regards,
Stijn Nestra
Verstuurd vanaf mijn iPhone
> Op 25 apr. 2020 om 09:47 heeft David J Taylor via time-nuts <time-nuts@lists.febo.com> het volgende geschreven:
>
> From: Andreas Kempe
>
> Hello everyone,
>
> I want to build an affordable quality time source for my computer
> club. I've been toying with the idea of using an oven controlled
> oscillator from Ebay for getting a reasonable (0,5 ppm frequency
> stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
> time. I was thinking of running this on a Raspberry Pi with FreeBSD
> and its gpiopps driver.
>
> Is this a reasonable setup for an affordable NTP server?
>
> Cordially,
> Andreas Kempe
> _______________________________________________
>
> Andreas,
>
> Here's an example of a simple device you can build:
>
> https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
>
> It's quite temperature sensitive, so either put it where the temperature is stable, or use ntpheat to keep the CPU at a much more constant temperature:
>
> http://www.satsignal.eu/ntp/Raspberry-Pi-ntpheat.html
>
> With those recommendations, and noting the delays in RPi I/O (at least in the earlier RPi cards where Ethernet is over USB), I would suggest that an OCXO is overkill. No reason to deviate from the Raspbian OS.
>
> You can gauge the performance from various Raspberry Pi devices here:
>
> http://www.satsignal.eu/mrtg/performance_ntp.php
>
> Cheers,
> David
> --
> SatSignal Software - Quality software for you
> Web: http://www.satsignal.eu
> Email: david-taylor@blueyonder.co.uk
> Twitter: @gm8arv
>
> _______________________________________________
> 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.
A
ASSI
Sat, Apr 25, 2020 7:18 PM
On Freitag, 24. April 2020 20:46:25 CEST Andreas Kempe wrote:
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
In the cheap & cheerful department, getting a GPS module that already has PPS
out is likely to be more effective than what you described above. A good
step-up from that setup then might be to replace the XTAL on the rasPi with a
19.2MHz OXCO. Anything better than that I'd suggest to use something other
than a rasPi. While you're at it, you will need at least three, better five,
of these in order to keep everything on time through the inevitable hiccup on
a single NTP server. If you expect that power loss to all systems might
happen and want them to recover without manual intervention, then you also
need an RTC on all of them.
Regards,
Achim.
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada
On Freitag, 24. April 2020 20:46:25 CEST Andreas Kempe wrote:
> I want to build an affordable quality time source for my computer
> club. I've been toying with the idea of using an oven controlled
> oscillator from Ebay for getting a reasonable (0,5 ppm frequency
> stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
> time. I was thinking of running this on a Raspberry Pi with FreeBSD
> and its gpiopps driver.
>
> Is this a reasonable setup for an affordable NTP server?
In the cheap & cheerful department, getting a GPS module that already has PPS
out is likely to be more effective than what you described above. A good
step-up from that setup then might be to replace the XTAL on the rasPi with a
19.2MHz OXCO. Anything better than that I'd suggest to use something other
than a rasPi. While you're at it, you will need at least three, better five,
of these in order to keep everything on time through the inevitable hiccup on
a single NTP server. If you expect that power loss to all systems might
happen and want them to recover without manual intervention, then you also
need an RTC on all of them.
Regards,
Achim.
--
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada
JB
Joe Bennett
Sun, Apr 26, 2020 2:33 AM
Would you care to share what you did? I found this online. It looks interesting. Maybe nothing more than a fun project. Seems to be a lot of debate on how effective it is. I'm a novice at this stuff so I don't have any value to add on it's effectiveness...
https://raspberrypi.stackexchange.com/questions/74482/switch-out-the-x1-oscillator-on-a-rpi-2-3
I may play with the python script that was in an earlier post. Just need to find a good way to insulate the PI. Bubble wrap just seems to not be a good solution. Sounds like a static collector to me.... ???
-- Joe
KA3NAM
Apr 25, 2020, 3:39 AM by stijn@pe1rks.nl:
Regarding the temperatur sensitivity of the raspberrypi, i have replaced the xtal on several if them by a tcxo. This a hell of a difference.
Kind regards,
Stijn Nestra
Verstuurd vanaf mijn iPhone
Op 25 apr. 2020 om 09:47 heeft David J Taylor via time-nuts time-nuts@lists.febo.com het volgende geschreven:
From: Andreas Kempe
Hello everyone,
I want to build an affordable quality time source for my computer
club. I've been toying with the idea of using an oven controlled
oscillator from Ebay for getting a reasonable (0,5 ppm frequency
stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
time. I was thinking of running this on a Raspberry Pi with FreeBSD
and its gpiopps driver.
Is this a reasonable setup for an affordable NTP server?
Cordially,
Andreas Kempe
Andreas,
Here's an example of a simple device you can build:
https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
It's quite temperature sensitive, so either put it where the temperature is stable, or use ntpheat to keep the CPU at a much more constant temperature:
http://www.satsignal.eu/ntp/Raspberry-Pi-ntpheat.html
With those recommendations, and noting the delays in RPi I/O (at least in the earlier RPi cards where Ethernet is over USB), I would suggest that an OCXO is overkill. No reason to deviate from the Raspbian OS.
You can gauge the performance from various Raspberry Pi devices here:
http://www.satsignal.eu/mrtg/performance_ntp.php
Cheers,
David
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv
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.
Would you care to share what you did? I found this online. It looks interesting. Maybe nothing more than a fun project. Seems to be a lot of debate on how effective it is. I'm a novice at this stuff so I don't have any value to add on it's effectiveness...
https://raspberrypi.stackexchange.com/questions/74482/switch-out-the-x1-oscillator-on-a-rpi-2-3
I may play with the python script that was in an earlier post. Just need to find a good way to insulate the PI. Bubble wrap just seems to not be a good solution. Sounds like a static collector to me.... ???
-- Joe
KA3NAM
Apr 25, 2020, 3:39 AM by stijn@pe1rks.nl:
> Regarding the temperatur sensitivity of the raspberrypi, i have replaced the xtal on several if them by a tcxo. This a hell of a difference.
>
> Kind regards,
>
> Stijn Nestra
>
> Verstuurd vanaf mijn iPhone
>
>> Op 25 apr. 2020 om 09:47 heeft David J Taylor via time-nuts <time-nuts@lists.febo.com> het volgende geschreven:
>>
>> From: Andreas Kempe
>>
>> Hello everyone,
>>
>> I want to build an affordable quality time source for my computer
>> club. I've been toying with the idea of using an oven controlled
>> oscillator from Ebay for getting a reasonable (0,5 ppm frequency
>> stability) 1 PPS signal and a cheap GSP chip with UART for syncing the
>> time. I was thinking of running this on a Raspberry Pi with FreeBSD
>> and its gpiopps driver.
>>
>> Is this a reasonable setup for an affordable NTP server?
>>
>> Cordially,
>> Andreas Kempe
>> _______________________________________________
>>
>> Andreas,
>>
>> Here's an example of a simple device you can build:
>>
>> https://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
>>
>> It's quite temperature sensitive, so either put it where the temperature is stable, or use ntpheat to keep the CPU at a much more constant temperature:
>>
>> http://www.satsignal.eu/ntp/Raspberry-Pi-ntpheat.html
>>
>> With those recommendations, and noting the delays in RPi I/O (at least in the earlier RPi cards where Ethernet is over USB), I would suggest that an OCXO is overkill. No reason to deviate from the Raspbian OS.
>>
>> You can gauge the performance from various Raspberry Pi devices here:
>>
>> http://www.satsignal.eu/mrtg/performance_ntp.php
>>
>> Cheers,
>> David
>> --
>> SatSignal Software - Quality software for you
>> Web: http://www.satsignal.eu
>> Email: david-taylor@blueyonder.co.uk
>> Twitter: @gm8arv
>>
>> _______________________________________________
>> 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.
>>
>
>
> _______________________________________________
> 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.
>
RS
Richard Solomon
Sat, May 2, 2020 12:00 AM
Hello, time Nutters--
I have been phase locking the freq counters in my HP 6-GHz VNA, Tektronix
spectrum analyzer and bench freq counter to the 10 MHz signal from
a Trimble Thunderbolt via a 4-port distribution box and long coax cables
to each of the instruments. This works well but is a pain in the tush
connecting to long coax cables when the bench test gear are moved around.
A friend suggested looking into some MEMS TCXO's made by SiTime to
do this with. SiTime offers a wide variety of Stratum-3 TCXO chips. One
of them is the SiT5358 which is spec'd at 0.05 ppm from 1 to 60 MHz.
https://www.sitime.com/products/super-tcxos/sit5358
I am wondering what any feedback thoughts might be on this from
the Time-Nuts gang? An eval-PCB board for the SiT5358 chip is
available. What say the Time-Nutters gang about this approach for
incorporating a small SiT5358 eval-PCB board into my bench test
gear for phase locking to? I am also wondering which of the
SuperStratum3 TCXO chips might be the best choice for a project
like this?
Any feedback on this is most welcome!
Mike Baker
Gainesville/Micanopy, Florida
time-nuts mailing list -- time-nuts@lists.febo.com
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http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
and follow the instructions there.
Where do you buy these ? Their web site was not too illuminating.
Tnx, Dick, W1KSZ
On Fri, May 1, 2020, 4:31 PM mpb45@clanbaker.org <mpb45@clanbaker.org>
wrote:
> Hello, time Nutters--
>
> I have been phase locking the freq counters in my HP 6-GHz VNA, Tektronix
> spectrum analyzer and bench freq counter to the 10 MHz signal from
> a Trimble Thunderbolt via a 4-port distribution box and long coax cables
> to each of the instruments. This works well but is a pain in the tush
> connecting to long coax cables when the bench test gear are moved around.
>
> A friend suggested looking into some MEMS TCXO's made by SiTime to
> do this with. SiTime offers a wide variety of Stratum-3 TCXO chips. One
> of them is the SiT5358 which is spec'd at 0.05 ppm from 1 to 60 MHz.
>
> https://www.sitime.com/products/super-tcxos/sit5358
>
> I am wondering what any feedback thoughts might be on this from
> the Time-Nuts gang? An eval-PCB board for the SiT5358 chip is
> available. What say the Time-Nutters gang about this approach for
> incorporating a small SiT5358 eval-PCB board into my bench test
> gear for phase locking to? I am also wondering which of the
> SuperStratum3 TCXO chips might be the best choice for a project
> like this?
>
> Any feedback on this is most welcome!
>
> Mike Baker
> Gainesville/Micanopy, Florida
> *****************
>
>
>
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