On 02/13/2012 08:28 AM, Javier Herrero wrote:
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
Hi Hal,
No outtage down here in Los Gatos, see the realtime plot here:
http://www.jackson-labs.com/images/gpsstat.htm
Said
Sent From iPhone
On Feb 12, 2012, at 20:52, Hal Murray hmur...@megapathdsl.net wrote:
Did anybody else notice nything? It might have been local noise/RFI.
I'm in
Hi, Magnus,
El 13/02/2012 09:06, Magnus Danielson escribió:
On 02/13/2012 08:28 AM, Javier Herrero wrote:
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
That is exactly my thinking, but I was looking for a second opinion :)
We have anyway asked Abracon for pn data on the 40MHz version to be
sure.
Most likely, the PN improvement will be somewhat better than the expected 12
dB close to the carrier, and somewhat worse than expected (if you see
On 02/13/2012 10:16 AM, John Miles wrote:
That is exactly my thinking, but I was looking for a second opinion :)
We have anyway asked Abracon for pn data on the 40MHz version to be
sure.
Most likely, the PN improvement will be somewhat better than the expected 12
dB close to the carrier, and
I have always thought the space inside the cover was the outer oven... now
I realize this is not quite correct but then the MV201, specified as a
double-oven, can't be a double-oven. The MV201 has the crystal under a sort
of Stonenge-like open structure: if this structure is the inner oven then
Hi Gents,
received my FE-5680A UN 63401 S/N 0311-61144...
Anybody can advise a few idea about this module..?
From the label I can see it requires +5 Volt but no info about the RS232...
Can I adjust the C field from the DB9 connector
Any info appreciated.
Many thanks and
On Mon, 13 Feb 2012 08:29:43 -0500 (EST)
Erno Peres erniepe...@aol.com wrote:
received my FE-5680A UN 63401 S/N 0311-61144...
Anybody can advise a few idea about this module..?
From the label I can see it requires +5 Volt but no info about the
RS232...
Can I adjust the C field
None on the east coast
On Mon, Feb 13, 2012 at 4:01 AM, Said Jackson saidj...@aol.com wrote:
Hi Hal,
No outtage down here in Los Gatos, see the realtime plot here:
http://www.jackson-labs.com/images/gpsstat.htm
Said
Sent From iPhone
On Feb 12, 2012, at 20:52, Hal Murray
Nothing in Minnesota.
Probably just the local terrorist cell tuning up the jammers for the
big event on Valentine's day.
Or a Light Squared test . . .
Bill Hawkins
-Original Message-
From: paul swed
Sent: Monday, February 13, 2012 7:52 AM
None on the east coast
Said Jackson
Thanks for your answers, Magnus and John. For now, I will take the 12dB
value as a starting point until further confirmation.
Regards,
Javier
El 13/02/2012 10:32, Magnus Danielson escribió:
On 02/13/2012 10:16 AM, John Miles wrote:
That is exactly my thinking, but I was looking for a second
I've an answer from Abracon. I had overlooked these plots:
http://www.abracon.com/Precisiontiming/AOCJY%20Typ%20Phase%20Noise%20Plots.pdf
The answer is that we can expect for the 40MHz unit a phase noise
performance half way between the 10MHz and 100MHz units performance.
That is, compared
Hi
A double oven should be one oven inside another oven. To count as an oven,
you need a surface to heat, heaters, a temp sensor, and a controller.
Insulation also comes in handy. You can indeed to multi zone heaters, but
that's not the way a double oven works.
The enclosure in the MV89
At 11:10 AM 2/13/2012, Bob Camp wrote:
trash the unit. Of course if somebody has one they hooked up backwards on
the supply...
I doubt that would do it--there appears to be a series Schottky on
the power input line.
--
newell N5TNL
___
Hi
Keep in mind that there's really nothing bad about these TBolts. They work
just fine for their stated purpose - as a GPSDO. All replacing the chip does
is let LH read the temperature in a high resolution mode. That's a perfectly
good reason to swap the chip - if you need the resolution.
Bob
Hi
Necessary question now that you see some of what's in the swamp:
Are you sure you want to do this from scratch rather than lock the FE up to
the 10 MHz output of a TBolt?
I'm by no means trying to say that there's an obvious answer here. Only that
it's at least worth asking the question. To
Hi
Hook up +12 to the case and ground the Vref line. There's always a way to
create smoke :)...
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Scott Newell
Sent: Monday, February 13, 2012 12:13 PM
To: Discussion of precise time
http://spaceweather.com/
The coronal mass ejection is due on the 13th through 14th.
___
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.
At 03:50 AM 2/13/2012, Azelio Boriani wrote:
I have always thought the space inside the cover was the outer oven... now
I realize this is not quite correct but then the MV201, specified as a
double-oven, can't be a double-oven. The MV201 has the crystal under a sort
I just checked the MV201
OK, I'll take pictures of the MV201.
On Mon, Feb 13, 2012 at 6:34 PM, Scott Newell newell+timen...@n5tnl.comwrote:
At 03:50 AM 2/13/2012, Azelio Boriani wrote:
I have always thought the space inside the cover was the outer oven... now
I realize this is not quite correct but then the MV201,
Bob
LH is attractive indeed, but the total layout for the receiver and such,
plus I learn not a thing from doing that really is the answer. Heck I can
just use the HP3801.
I have already learned quite a bit. How to control the EFC and the range
and such (Tuning sensitivity) Worked with a new D/A
From the label I can see it requires +5 Volt but no info about the
RS232...
Can I adjust the C field from the DB9 connector
On the units that require 5V you can adjust the frequency using rs-232
but only within a very small range around 10MHz. Some of the
documentation
Hi Chris,
thanks for the info. My second problem is that the unit is in locked position
after powering up but after about 5-8min the freq goes down slowly about
9.999.997.3 Hz and the lock ind level is still low.
Also noticed that during the sweep the max freq is 10.000.004 Hz and the
Hi
For what ever reason, most of the FE's sweep down to about 200 to 250 Hz
low. Few sweep more than 50 Hz high. I have one unit that locks fine and
only sweeps 5 Hz high.
Yes, I would open it up and re-tune. I think I would only bump it about 50
Hz or so. I have no idea *why* they are all tuned
The reason to sweep low is to establish a particular lock pattern to look
for.
Check the programmed offset before retuning. Mine was at mid range
Search the threads for sending commands to the FE5680.
On Mon, Feb 13, 2012 at 2:56 PM, Bob Camp li...@rtty.us wrote:
Hi
For what ever reason,
Last week I noted that the FE-5680A's barefoot output was found to NOT
be a suitable 10 MHz reference for microwave transverters.
Specifically, I tested it on two different 10 GHz transverters and found
there to be objectionable levels of grunge on signals caused by
low-level phase modulation
Clint a good read and a fine approach.
By accident I looked at the original filter schematic first and believe it
has an error for the first output amplifier. The 470 ohm resistors in the
wrong location.
Others on the list have mentioned the same thing about the 5680s output
being dirty. You have
I'm not that fond of the way in which 10MHz is made available on a DB9.
But there's a vacant site for an AC161 on the FE5680 PCB to perform a /6
operation from the 60MHz crystal. To good an opportunity to miss up
Here is some pics of the mod.
Hi
If they are looking for a pattern what is the pattern?
Bob
On Feb 13, 2012, at 3:35 PM, paul swed paulsw...@gmail.com wrote:
The reason to sweep low is to establish a particular lock pattern to look
for.
Check the programmed offset before retuning. Mine was at mid range
Search
Hi
Some numbers:
C field tuning on a Rb like an FRS or an LPRO is about 2 to 6 ppb
DDS tuning on the new FE's is in the 1 to 10 ppm range (1000x larger)
DDS tuning on the old FE's was about 10% without mods, much wider with minor
tuning.
Bob
On Feb 13, 2012, at 2:16 PM, Erno Peres
The patterns simply the lead in to lock. Coming from a known position low
in frequency...
Nothing magical
On Mon, Feb 13, 2012 at 7:48 PM, Bob Camp li...@rtty.us wrote:
Hi
Some numbers:
C field tuning on a Rb like an FRS or an LPRO is about 2 to 6 ppb
DDS tuning on the new FE's is in the 1
I don't mind sending something like $5 to a buy group and we'll have
enough with a few of us. But if I were Elio I'll not feel very happy
using a working unit for this kind of use, I would try to not break
anything and he is even talking of removing the programmable chips to
read them in a
paul swed wrote:
Clint a good read and a fine approach.
If and only if the high phase noise pedestal exhibited by the buffer
amplifier that extends to offsets of a few hundred kHz or so isn't an issue.
The relatively low isolation between the 10MHz outputs may also be an issue.
By
Email some of the sellers in China and offer to buy a returned unit.
they must have some
On Mon, Feb 13, 2012 at 5:55 PM, EB4APL eb4...@cembreros.jazztel.es wrote:
I don't mind sending something like $5 to a buy group and we'll have
enough with a few of us. But if I were Elio I'll not feel
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