Hello all,
I'm planning to use in an application this oscillator
http://www.abracon.com/Precisiontiming/AOCJY.pdf in the 40MHz version.
The phase noise data in the data sheet is for the 10MHz version. Is it
possible to "extrapolate" these numbers to what I could expect in the
40MHz version? A
I haven't looked it up myself, but as I write this, the KFI radio show host
mentioned there was a corona mass ejection. But it is due to hit earth on
Tuesday.
-Original Message-
From: David
Sender: time-nuts-boun...@febo.com
Date: Sun, 12 Feb 2012 23:19:52
To: Discussion of precise
I do not see any space weather anomalies that would explain it so my
guess is a local problem.
On Sun, 12 Feb 2012 20:52:54 -0800, Hal Murray
wrote:
>
>Did anybody else notice nything? It might have been local noise/RFI.
>
>I'm in California (Silicon Valley). It was about Sat noon-midnight loc
Did anybody else notice nything? It might have been local noise/RFI.
I'm in California (Silicon Valley). It was about Sat noon-midnight local
time, 8PM Sat to 8AM Sun UTC.
A TBolt and Z3801A went into holdover. The TFOM on the Z3801A jumped up to 4
for a while.
Most of my low cost GPS/NMEA
Thanks at least a beging to the puzzle.
Regards
Paul
WB8TSL
On Sun, Feb 12, 2012 at 10:24 PM, Elio Corbolante wrote:
> Being not yet able to dump the FE-5680A firmware, I started to write down
> the DIGITAL part of the schematics:
> <
>
> http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680
Being not yet able to dump the FE-5680A firmware, I started to write down
the DIGITAL part of the schematics:
<
http://www.rhodiatoce.com/pics/time-nuts/FE-5680A/FE-5680A_schematics_v0.0.pdf
>
I hope it can be useful to some of you. (any suggestion is welcome!)
- - - - - -
with this email I renew
Better idea. Let's all donate a few bucks each and buy Elio an intact one.
Peter
On 2/12/2012 8:08 PM, EB4APL wrote:
Hi,
Has anybody tried to ask the guy who made the forensics in Youtube if he could
send the remnants to Elio? He could make a very good use of them.
Regards,
Ignacio, EB4A
On 02/13/2012 02:19 AM, John Miles wrote:
The ADEV difference of about 6 db at 1ms tau can be explained by the fact
that if I apply a 500 Hz LP filter to my 9600 sps raw data, the same
filter
used on the 5120A's 1K sps data, then even our 1ms ADEV answers
become very close.
I have found that
Hi Gang;
You most likely have this link to Morion with data sheets on all their
oscillators, but if you don't: http://www.morion.com.ru/eng/oscillators/ocxo/
Best Wishes;
Thomas Knox
> Date: Sun, 12 Feb 2012 19:11:11 -0600
> To: time-nuts@febo.com
> From: newell+timen...@n5tnl.com
> Subject:
> The ADEV difference of about 6 db at 1ms tau can be explained by the fact
> that if I apply a 500 Hz LP filter to my 9600 sps raw data, the same
filter
> used on the 5120A's 1K sps data, then even our 1ms ADEV answers
> become very close.
> I have found that using a 1/2 zero tau BW filter like
At 05:45 PM 2/12/2012, Sam wrote:
Thanks for the pictures Scott, it was interesting to see under the
shell of these.
I wasn't expecting the inside to look so "hand made".
Yep. Some of the surface mount components appear to be hand
soldered. I was a little surprised that there was no mechani
Hi,
Has anybody tried to ask the guy who made the forensics in Youtube if he
could send the remnants to Elio? He could make a very good use of them.
Regards,
Ignacio, EB4APL
El 07/02/2012 0:30, Elio Corbolante wrote:
From: "Steve ."
I've been considering ripping the firmware from the mcu
Le 12/02/2012 19:58, cfo wrote:
> I recently got 2 tbolts , and i'm quite sure they have the "bad"
> temperature chip.
>
I have replaced several with REV C chips and those work fine as well.
The popular auction site has several listings for DS1620 chips.
-Arthur
_
Thanks for the pictures Scott, it was interesting to see under the shell of
these.
I wasn't expecting the inside to look so "hand made".
At 02/13/2012 04:53 AM, Scott Newell Wrote:
> If that's actually the inner oven, where's the outer oven? I don't
> see any heated components in contact with t
Hi
The sawtooth correction needs an accurately calibrated time offset measurement
to work against. That's not a requirement for a simple loop. Not impossible to
do, but it adds another constraint.
Bob
On Feb 12, 2012, at 3:05 PM, Chris Albertson wrote:
> On Sat, Feb 11, 2012 at 4:45 AM, Bo
Le 12/02/2012 19:58, cfo wrote:
I recently got 2 tbolts , and i'm quite sure they have the "bad"
temperature chip.
They say mfg date : 2004 and 2005 in heather
I have a 2003 Tbolt , that shows and updates the temperature constantly.
And the "yellow temp graph" is "natural".
The 2004& 2005's d
On Sat, Feb 11, 2012 at 4:45 AM, Bob Camp wrote:
> Hi
>
> Another way to build an analog phase detector...
>
> Next layer on the onion is how to get the sawtooth correction out of the GPS
> and into your loop.
>
Assuming you have a uP in the loop the sawtooth is easy the GPS sends
the value out
Hi
Have LH do the survey and then have it do an auto calibration.
Bob
On Feb 12, 2012, at 12:42 PM, "David C. Partridge"
wrote:
> Or even better get Lady Heather to do the 48 hour survey.
>
> Dave
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@feb
Hi Warren --
Thanks for the hint about looking for phase jumps.
I just changed the altitude from my initial entry based on MSL altitude to GPS
altitude and that made about an 80 - 90 nanosecond change in PPS compared to
the other units, and in the right direction (brought the Tbolt closer to th
I recently got 2 tbolts , and i'm quite sure they have the "bad"
temperature chip.
They say mfg date : 2004 and 2005 in heather
I have a 2003 Tbolt , that shows and updates the temperature constantly.
And the "yellow temp graph" is "natural".
The 2004 & 2005's does rarely update , and the grap
John
I have Not seen any reliable consistent way to predict what the Tbolt will
use for it's altitude, It seems to just do it's own thing.
It is certainly NOT the same as the Oncore's answers.
To get close and see if the different is 30 meters etc, take the Tbolt out
of fixed location and wa
To get the most from ADEV numbers one needs to be able to get
repeatable and reproducible results.
To get that at short taus the tester needs sub ps resolution.
To get it at long taus, all uncontrolled variable influences that effect the
results (such as temperature) need to be removed and plotte
At 08:26 AM 2/12/2012, Azelio Boriani wrote:
Extremely delicate that fluffy contton, try not to tear apart it so that
you can place it again on top when closing the MV89. In my opinion the
internal oven is the inner one...
If that's actually the inner oven, where's the outer oven? I don't
see
That's an experiment I should run, but the current experiment requires setting
the Tbolt to the same coordinates as the other units, so I'm just looking to do
that. :-)
On Feb 12, 2012, at 12:42 PM, "David C. Partridge"
wrote:
> Or even better get Lady Heather to do the 48 hour survey.
>
> D
Or even better get Lady Heather to do the 48 hour survey.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Azelio Boriani
Sent: 12 February 2012 16:31
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts]
Let the TBolt do its autosurvey and see the difference... then you can
correct with a more precise set of coordinates. Or, is the autosurvey not
available in the TBolt? OK, Let me take a look at the manual...
On Sun, Feb 12, 2012 at 4:42 PM, John Ackermann N8UR wrote:
> When manually entering co
On 2/11/12 7:42 AM, paul swed wrote:
Indeed interesting but the 5370s seem to go for $300-400 and this $1750.
I had been lucky to get my 5370s pre-interest price accelerator so $50-75.
Because who would ever want such a heavy thing?
Much as I love the modern interfaces, size, quite, and low power
When manually entering coordinates to the Tbolt, using either Tboltmon
or Lady Heather, is the altitude value to be entered as MSL or as GPS?
The Trimble docs don't seem to indicate which value is used.
Based on the surveys I've done with the Motorola receivers, at my
location there appears to
Ugly little sucker isn't it!!
:-)
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Scott Newell
Sent: 12 February 2012 02:14
To: time-nuts@febo.com
Subject: [time-nuts] Morion MV89A pics
As requested, pics of the inside o
Extremely delicate that fluffy contton, try not to tear apart it so that
you can place it again on top when closing the MV89. In my opinion the
internal oven is the inner one...
On Sun, Feb 12, 2012 at 3:14 AM, Scott Newell wrote:
> As requested, pics of the inside of my Morion XO00281M-CT-MV89 M
That next weeks project!
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Paul,
please don't get me wrong: I own a 5370A and a SR620 myself and I am happy
with them. But they CAN generate you a lot of trouble starting with bad ic
sockets and ending with serious faults of the 5370's interpolator board. I
got my 5370 only running through the help of a friend who repairs s
Bob,
> If I hit the Acquire / U6200A entry in the Timelab menu will
> it buy one for me?
Perhaps John is willing to add an "Buy item for me" menu entry?
> How noisy is it? Put another way, it has 40 ps resolution,
> how close can you get to that in terms of accuracy?
Good question! That is wh
Arthur,
I had also some trouble in buying the counter. I had originally ordered the
20 GHz version of the counter from a different dealer for about 2000 Euros.
Then it turned out that the 20 GHz option alone (i.e. without the counter)
costs 2000 Euros. Then I decided to stay at the 6 GHz version.
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