Thank you Martin,
To be honest, I didn't know that the sleep command could be utilized with a <1
Foolish of me to not have tried it.
On 02/07/2015, Martin Burnicki wrote:
> Frister wrote:
>> My NTP server did a double 59 on the terminal. for anybody who is
>> inter
My NTP server did a double 59 on the terminal. for anybody who is interested
I captured the event :
https://youtu.be/OpNci29CI7E
I did measure an odd behaviour on leapsecond day from time-a.nist.gov NTP server
usually it runs about 8 mS behind my local PPS but all the sudden went
to +22 mS for
most
Bob,
I've used one for a simple 10 Mhz ref.
They are 12 V, and indeed the VFC is +2.5V
If you hold the OCXO upside down, the 2 pins at the top are GND and +12V
Bottom 3 Pins -> 10 Mhz, unknown and VFC
Frits W1FVB
On 09/06/2015, Bob Stewart wrote:
> Does anyone have any information about the Trim
I've noticed that on my RPI as well,
Time stability improved greatly when connected to a simple and well
cooled 7805 voltage
regulator. My RPI (GPS PPS) runs at about +/- 2 uS on a somewhat
medium CPU sytem
load. Good enough for my needs.
Frits
On 5/24/15, Attila Kinali wrote:
> On Wed, 13 May 2
Hi David,
Yes, You mean the hourly dips? That is caused by the the VLF receive
software that
is running on the same PI. It makes hourly recordings of DC to 24 Khz
with a USB soundcard. The CPU is running at max capacity most of the
time.
Perhaps it is now time for a dedicated PI, that only has the
Thanks for pointing this out David,
Compiling an new kernel was holding me back. I followed your instructions and
everything works beautiful. The PI that is running the PPS timekeeping with NTP
is serving as a VLF receiver as well. Taxing the poor CPU, but with
kernel PPS support
the NTP daemon has
John,
On 12/8/14, John C. Westmoreland, P.E. wrote:
> Hello Frits,
>
> Interesting. A little different than what I heard - but of course depends
> on the bandwidth somewhat.
I think my bandwidth was set at about 8 Khz
>
> How many dB was this up from the noise floor? Or - what is the signal
>
Recorded last night. Audio bandwidth is a few kHz, but as mentioned before
the signal is about 20 kHz wide.
https://www.dropbox.com/s/bnp8zcpgw86l6ww/1910.wav?dl=0
This morning (14:21 UTC) nothing is heard
Frits W1FVB
Whitefield, NH
On 12/8/14, John C. Westmoreland, P.E. wrote:
> Hello,
>
> Ca
I'm hearing the same signal in northern New Hampshire.
Very strong
73, Frits W1FVB
On 12/8/14, Bob Camp wrote:
> Hi
>
> 120 Hz sub structure suggests a (much lower power) switching power supply
> run amok. I certainly would not design a system that would have virtually no
> immunity to power
Sounds like a great idea,
Maybe I can venture beyond the Raspberry Pi with NTP and PPS GPS
..how far does the rabbit hole go?
Frits
On 7/14/14, Scott Newell wrote:
> At 04:09 PM 7/14/2014, saidj...@aol.com wrote:
>>
>>I think we need to have a "Time Nuts For Dummies" article written that
>>takes
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