El 09/12/2011 02:27, Peter Bell escribió:
5) Although the output is a sine wave, it's not especially nice -
internally it's derived from a square wave fed into a rather simple
filter circuit - having said that, none of my test gear has any
problem with using it for a reference input,
Regards.
UK GPS jamming - February 2012
I have received the following:
___
NOTIFICATION OF GPS JAMMING EXERCISES RAF SCULTHORPE AIRFIELD, EAST
ANGLIA, FEBRUARY 2012
Dates: Between 6 and 10 February 2012 inclusive.
Times: between 0700 and 1700 GMT.
Javier,
the plots are nice, and I did the same years ago for an Efratom
FRS-C. Found about the same data. The only point is that with the
spectrum analyzer you see the S/A pahse noise, not the Rb, wich has
to be orders of magnitude lower.
About the comments on the waveform and harmonics
Marco
Think you are correct for most things we do.
However in communications for mixing and such a sine wave is desirable and
a very clean output to minimize things like IMD and other products as we
get the 10 MC to its final frequency. Since you are a ham you may
appreciate that.
Regards
Paul
Hi All,
If anyone is ever in need of Local Management Software for the OSA 5240,
drop me a private mail.
Great unit at Zero cost. After config the 3RU case is equipped with 16 x
BNC outputs at 10MHz 1VRMS into 50 Ohm.
Regards
Gerald
VK3GJM
Hello,
Yes, I know that the phase noise is the spectrum analyzer one, but the
spurious that are around (mostly -70, -80dBc) are not, particularly the
ones at +/200kHz and +/-400kHz. I was mostly curious about the harmonics
and other spurii since in this unit, 10MHz are generated from a CPLD
Getting the square wave out is easy - if you follow down the trace
from that J8 socket (which is also connected to the output on the
D-type) it goes to a cap - just remove that and solder a jumper across
the pair of pads to the left of it (I.E. closer to the PLD).
Regards,
Pete
On Fri, Dec 9,
Seeing that other post about an Oscilloquartz GPSDO made me wonder if
anyone on here knows about these?
It's a board-level product, which looks very much lile it's designed
to go into some piece of telecoms equipment. Push button switch, 2
SMA connectors and a D-type on the front panel - carrier
Can you let us have a picture?
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Peter Bell
Sent: 09 December 2011 13:55
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Anyone know anything
At 14:21 09-12-11, you wrote:
Marco
Think you are correct for most things we do.
However in communications for mixing and such a sine wave is desirable and
a very clean output to minimize things like IMD and other products as we
get the 10 MC to its final frequency. Since you are a ham you may
Marco I understand also. But good enough for this conversation.
What I find interesting is that you can not even find a good xtal these
days for $40.
Yet here is a complete package that delivers quite a bang for the buck.
I have wavered back and forth on buying one since I already have numbers of
Paul
I was exactly where you are. The last thing I needed was an other Rb. But
an Rb at $ 40 I did bite the bullet and running the tests I do not regret
it.
Bert Kehren
In a message dated 12/9/2011 10:11:06 A.M. Eastern Standard Time,
paulsw...@gmail.com writes:
Marco I understand
I understand Bert.
But you wanted to test it. I actually don't have a real reason grab one of
these jewels.
Though understanding when the piles gone, its gone. Thats the way it works
on this stuff.
But I have 6 of the old cel site Lucent RBs all $20 and a Good HP 5065 and
then last spring a lpro
I've ordered one.
Meanwhile, my Racal-Dana 1992 soldiers on nicely.
The attached is a gnuplot of a few days' measurements of the
Trimble Thunderbolt's 10 MHz output.
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
I guess I need somewhere to upload it, since the file size restriction
on the list makes it impossible to get any detail...
This should give you a vague idea, anyway.
Regards,
Pete
On Fri, Dec 9, 2011 at 10:47 PM, Robin Kimberley
robkimber...@btinternet.com wrote:
Can you let us have a
At 18:23 09-12-11, Javier wrote:
I think that the low-band preselector (I don't remember the model)
was more oriented to increase the dynamic range for EMC testing,
rather than due to a crappy harmonic response of the analyzer. It
also includes a preamplifier.
Correct. 85685A, a very
El 09/12/2011 18:54, Marco IK1ODO -2 escribió:
At 18:23 09-12-11, Javier wrote:
I think that the low-band preselector (I don't remember the model)
was more oriented to increase the dynamic range for EMC testing,
rather than due to a crappy harmonic response of the analyzer. It
also includes
Bob Smither wrote:
Chuck Forsberg WA7KGX N2469R wrote:
The price seems reasonable, esp. with free shipping.
Does anyone have experience with these?
Is the circuit board included?
I could not resist at $40.00 delivered. Mine has been running for a
couple of weeks, but my measurements have
I noticed that the topic of the Long Now 10,000-year clock came up here last
month. A paper on its timekeeping issues will be published in the proceedings
of Decoupling Civil Timekeeping from Earth Rotation, a meeting held in
Pennsylvania in October:
http://futureofutc.org
The
Bob Smither wrote:
snip
My documentation states that the full range of adjustment is:
7f ff ff ff = +383 Hz
80 00 00 00 = -383 Hz
This scale factor is clearly wrong - using it and applying an appropriate
correction changes the frequency way too much.
From:
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