Hi all,
Been on the lookout for a PRS10 to build a GPSDO+RB arrangement and I
see these...
http://www.ebay.com/itm/Stanford-Research-Systems-SRS-PRS10-Rubidium-Freq-Standard-12344101-08-no-lock-/231435472155
Is this just a reheat-the-bulb fix or do you suspect something more ?
Not knowing mu
Hi
As far as anybody knows, the only pins on the power plug are the two assigned
to power in. The rest are unused.
The alarm outputs are a couple of opto isolator outputs. As yet, nobody seems
to know what they do. The pins are 5,6 and 7,8.
Bob
> On Dec 29, 2014, at 7:14 PM, Martin A Flynn
On Mon, Dec 29, 2014 at 4:02 AM, David J Taylor <
david-tay...@blueyonder.co.uk> wrote:
>
> - NTPns doesn't support my PPS source
>
> - for testing, using local servers alone, even the seconds don't get
> "named" correctly, even though NTPns shows they are being detected and one
> is even marked a
I am making up cables with slide latches for the Lucent KS-24361.
Questions:
* Are pins (Pin3 - Pin 9) in the P1 / DE-9 power connector assigned,
or spare?
* Has anyone determined the pin out for J3 / DE-9 alarm connector?
Martin Flynn
___
time
On Mon, Dec 29, 2014 at 7:02 AM, David J Taylor <
david-tay...@blueyonder.co.uk> wrote:
> Using a mixture of PPS and local servers is exactly what I was aiming for,
> but:
>
> - NTPns doesn't support my PPS source
>
I don't understand this. But getting a compatible GPS seems reasonable to
move f
Hi
> On Dec 29, 2014, at 7:55 AM, Li Ang wrote:
>
> Hi Magnus,
> The unit of these data is not ns but reference clock cycles (100ns).
> TDC_GP22 measures the time between the edge of tdc_start and
> tdc_stop1, then it measures the reference clock automaticly. The result you
> get from it is th
Hi,
Darn, not reading all the notes. Again.
Well, in that case, scaling should be done... then you get average of
198,5075 ns and 149,8 ps RMS jitter, with 1,1 ns peak-to-peak.
The jitter is okish then, but a little better would indeed be nice.
Cheers,
Magnus
On 12/29/2014 01:55 PM, Li Ang
Clearly off-topic, but hopefully it will stop here...
The Dell supplies use a 3 wire cable and have a resistor in the power
supply connecting the 3rd wire to ground. The value of that resistor tells
the laptop the current capability of the supply (they have various models
between 3.0 and 4.5A) so
You have to give the guy credit for trying.
What is a shame here is that he did not
publish the schematics and the source code.
If anyone knows him he should just ask him. We tend to
be sceptics here but that's the nature of the game.
However, I don't want anyone to think that we are elitist.
I r
Hi
Ok, well that’s a move forward on this GPSDO. There is a *lot* more data on
that listing than there was a month ago.
Thanks for digging it up and posting the link.
If you look at the ADEV at 1 second, it’s running at 2.67 x10^-11. That’s all
coming from the Erratum Rb that they are using
The OCXO is a Morion (Russia) MV89A. You may download a datasheet
from http://www.morion.com.ru/catalog_pdf/MV89-OCXO.pdf
Looks decent, stability vs. temperature and aging are "as usual".
BG7TBL is a Chinese radioamateur, quite known for his designs.
73 - Marco IK1ODO
_
Hi Magnus,
The unit of these data is not ns but reference clock cycles (100ns).
TDC_GP22 measures the time between the edge of tdc_start and
tdc_stop1, then it measures the reference clock automaticly. The result you
get from it is the ratio of them.
2014-12-29 19:58 GMT+08:00 Magnus Danielson
From: Chris Albertson
Can't you combine a few Internet pool NTP servers with a local 1PPS
source? The Internet servers will "name the seconds".
Also if you really need a Motorola Oncore you can buy them for $20 on
eBay. There is no shortage. I paid $18 with free shipping for a UT+
I run the
Hi,
Some quick statistic-processing.
Histogram of your data:
1.979 0
1.980 2
1.98146
1.982 173
1.983 523
1.984 1031
1.985 1301
1.986 1131
1.987 648
1.988 236
1.989 8
1.990 1
1.991 0
The total sample count is 5100 (wc -l only gives 5099 since there is a
missin
Can't you combine a few Internet pool NTP servers with a local 1PPS
source? The Internet servers will "name the seconds".
Also if you really need a Motorola Oncore you can buy them for $20 on
eBay. There is no shortage. I paid $18 with free shipping for a UT+
I run the UT+ and leave the Thunde
I remember seeing this same unit here on this list some weeks ago. As I
remember it is built from some plans that were published. You can see
that it uses a surplus OCXO. The seller is good to claim the specs of his
GPSDO as being "two orders of magnitude above the OCXO". because we don't
know
Li Ang wrote:
This unit is done by BG7TBL. In his store on taobao.com,
there is a adev chart. Please refrer to this link
That ADEV chart (see below) raises more questions than it
answers. At least the time constant is not too short (a very common
problem with DIY GPSDOs). But when the GPS
Some time ago, there was a thread about whether Z38xx writes to the
GPSDO's NV memory every second, raising the possibility that it could
prematurely wear out the NV memory if it were used continuously to
monitor a GPSDO. Here is what Ulrich said (23 April 2013):
due to the discussion that e
From: Paul
[]
I've avoided asking why you're doing this because -- to misquote Yoda --
"Do nor do not, there is only try" But if you're not switching out the
system clock it doesn't really seem like either a time-nut or ntp-nut
project.
___
Thanks for
Am 29.12.2014 um 00:39 schrieb Dr. David Kirkby (Kirkby Microwave Ltd):
2) Can anyone with these $150 two-part Lucent boxes tell me the size of
them.
The box itself: 65mm high, 152 mm deep, 244 mm wide
Front plate: 76 mm high, 274 mm wide
Just a little bit to big to fit into a 4 HU 19" bo
drkir...@kirkbymicrowave.co.uk said:
> 1) From what I gather, the HP GPS timing receivers can be observed/
> controlled with HP SmartClock. But where I download it from? I drew a blank
> with Google, as well as the Microsemi site
It's called satstat rather than SmartClock.
> 2) Can anyone
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