On Sat, 30 Mar 2013 21:40:47 +
li...@lazygranch.com wrote:
The circuit is something like the instrumentation amplifier.
The description starts on page 207 with a schematic on page 208.
I can scan it later, but the circuit is easy to describe. Think of two
op amps in the classic current
Moin,
On Sun, 31 Mar 2013 12:28:59 +1300
Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
With a suitable low noise tunable LO (laser) the frequency spectrum
beyond the photodiode electrical bandwidth can be explored.
I don't exactly get how the laser spectrum (line width?) can be
exploited
On Sat, 30 Mar 2013 20:45:43 +
David Kirkby david.kir...@onetel.net wrote:
Fulll thesis here
http://www.medphys.ucl.ac.uk/research/borl/docs/dkirkby.pdf
I have seen systems where one sinusoidally modulates the voltage of a
photomultipler tube. You could do the same with an APD. Then it
On 31 March 2013 13:52, Attila Kinali att...@kinali.ch wrote:
But probably using an APD with gain modulation at 1GHz or so, i could
down modulate the signal to something that is easier to handle
(ie something similar as a direct conversion software defined radios).
I wonder if this would
On 3/30/13 2:58 PM, Lizeth Norman wrote:
What a bunch of hooey. Another so called expert wasted hours of my time
because he can't be bothered to either note that code is buggy or just
can't be bothered..
If you don't want to release it, then don't. If you do and it's a POS,
Expect emails.
On 3/30/2013 7:48 AM, Attila Kinali wrote:
So far, i figured out that PIN photodiodes can go up to several 100MHz
transition frequency and avalanche photodiodes are available up to 2GHz.
The only photodiodes that go higher are those for the telecom range
at 1-1.5um, which is a bit low for my
All u guys that post code to push up your little ego and then don't help
when it sucks need to see a shrink.
Don't want emails, don't post. Keep your bad code in the folder were it
belongs.
There are enough who think they know.
And finally: The code in question is without question buggy.
BTW:
On 31.03.2013 17:32, Lizeth Norman wrote:
All u guys that post code to push up your little ego and then don't help
when it sucks need to see a shrink.
Don't want emails, don't post. Keep your bad code in the folder were it
belongs.
Are you suppossing that anybody that releases any code must
Not only has this thread been completely off topic from this list, but the
level of discourse has turned abysmal, and now we are even posting insults.
I have not seen that kind of tone in more than 7 years on this list.
Please discuss this between yourselves, and spare the rest of us.
Said
I totally agree with Said.
Please take this stuff somewhere else and let us get back REAL Time-Nut
stuff.
Had
K7MLR
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Said Jackson
Sent: Sunday, March 31, 2013 10:10
To: Discussion of
There are those of us who write code to solve a problem and post it so others
can use it as is or as a starting point for their own code.
Has nothing to do with ego boosting has more to do with paying it forward for
all the snippets of code and diagrams we used in the past to jump start
On a positive note, the number of people that have demonstrated the
downright humility to help me has been staggering. Not only with the
basics, but the details as well.
All it takes has been a cogent email. No begging or offer of other.
Said taught me much about smt prototyping. All in one email.
Documents written and will convert to adobe later today. However the doc is
300KB in size and does not even contain pictures and strip charts so the
time-nuts mailbox won't accept that. Several of you in the past have been
kind enough to offer to host the file. If you can directly email me please
Hi
I'm sure the usual web sites would be quite happy to host the files.
Bob
On Mar 31, 2013, at 3:16 PM, paul swed paulsw...@gmail.com wrote:
Documents written and will convert to adobe later today. However the doc is
300KB in size and does not even contain pictures and strip charts so the
Nothing to do with laser line width.
Merely indicating that the photodiode mixer can be used with a suitable
LO to build an optical spectrum analyser front end.
Bruce
Attila Kinali wrote:
Moin,
On Sun, 31 Mar 2013 12:28:59 +1300
Bruce Griffithsbruce.griffi...@xtra.co.nz wrote:
With a
On Mar 31, 2013, at 11:32 AM, Lizeth Norman normanliz...@gmail.com wrote:
All u guys that post code to push up your little ego and then don't help
when it sucks need to see a shrink.
*and*
On Sun, Mar 31, 2013 at 1:11 PM, Scott McGrath scmcgr...@gmail.com wrote:
[This] [h]as nothing to do
At Paul's request, I've put his document about the PSK scrubber for WWVB at:
http://www.febo.com/pages/wwvb_psk/WWVB%20d-psk-r%2003302013.pdf
John
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
Thanks John.
On Sun, Mar 31, 2013 at 5:21 PM, John Ackermann j...@febo.com wrote:
At Paul's request, I've put his document about the PSK scrubber for WWVB
at:
http://www.febo.com/pages/**wwvb_psk/WWVB%20d-psk-r%**2003302013.pdfhttp://www.febo.com/pages/wwvb_psk/WWVB%20d-psk-r%2003302013.pdf
Hi All,
I've setup a TBolt with a late model oscillator mounted externally to
the case, and moved the C version temp sensor from the main PCB to the
oscillator. With a little fan, LH is keeping the temperature within
about 0.02dC. Amazing, given I have about 10dC ambient variations.
How do
Hi
If the VCXO's tuning voltage runs from zero to 5 volts, and the VCXO tunes 0.1
Hz / 0.5 volts at 12 MHz, then it has a total range of about 1 Hz at 12 MHz.
That's about 0.08 ppm of tune range. A generic crystal likely has a tempo of
0.1 to 1 ppm / C. My guess is that you will need a bit
Hi,
Uhm, yes. You want your pulling-range to handle all the drift and tempco
you reasonably can assume, and also that of the application and signal.
Since the signal is WWVB in this case, we can ignore that factor. Also,
you don't want to be completely de-tuned from start either. I'm sure
Hi
But can you ignore the WWVB signal swing? The beast flips a cycle (or more) as
you hit sunrise or sunset. A cycle at 60 KHz is a lot of ppm. Weather this
happens fast enough to actually turn it into a tuning issue is the question.
Bob
On Mar 31, 2013, at 7:36 PM, Magnus Danielson
Hi,
True. The station itself doesn't swing +/- 100 ppm, but the channel you
recieve it from can alter delay quick enough to annoy you. But the
phase-change needs to put in context with the time it takes to make the
phase-change in order to come up with a frequency error.
However, if it
Sorry Everyone,
The answer is in the LH readme, and I completely overlooked it.
/k[?=#] - set temp control parameter '?'
Cheers,
david
Hi All,
I've setup a TBolt with a late model oscillator mounted externally to
the case, and moved the C version temp sensor from the main PCB
Bob and Magnus no offense taken at all good comments and thats why I
shared. Needs other eyes then just mine. I captured the text in a seperate
document reread tomorrow.
Easy stuff first. Magnus the concerns on the channel are very real and it
really does shift phase significantly. I do see this
Noise adds in a RMS fashion unless it is correlated. So a differential
amplifier can cancel common mode noise, but that is about it. The diode,
being a single ended device, seems to me to be impossible to bias in a
manner where the noise from the bias circuitry will cancel out.
Note it may
I've bought optical filters from Andover. They are pretty cheap, at
least compared to the rest of the industry.
http://www.andovercorp.com/Web_store/index.php
On 3/31/2013 5:52 AM, Attila Kinali wrote:
Probably. But as steep filters for optics are kind of hard to come by,
i think a super
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