I wonder if the PicoSync-II software would be compatible?
http://support.fei-zyfer.com/95_download.aspx
Hi:
Is there a manual, data sheet, docs of any kind or software for the FEI Pico
Sync?
http://www.prc68.com/I/FEIFS.shtml#Picosync
--
Have Fun,
Brooke Clarke
Yes, interesting.
Thanks
On Mon, May 14, 2012 at 12:16 AM, paul swed paulsw...@gmail.com wrote:
Good site had not run into it before
Thanks
On Sat, May 12, 2012 at 6:54 PM, J. Forster j...@quikus.com wrote:
Hi,
I fround this site this evening:
Yes, that was my intention: I posted the VHDL of the TimeToDigital TIC I
use. Next will be the PI controller. I hope this short roadmap will lead to
the evolution of the Shera controller.
On Mon, May 14, 2012 at 4:37 AM, J. L. Trantham jlt...@att.net wrote:
I have always been interested in
Hi Kevin - I have a spare I can send you. I responded direct to your email
but no reply.
Merv VK6BMT
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Hi Sam:
Thanks. After adding .exe to the file name it installs and runs.
Now the problem is the connector on the Pico Sync, it's a DB-9m, unlike the DB-9f on the Thunderbolt and most of my
other RS-232 stuff.
Have Fun,
Brooke Clarke
http://www.PRC68.com
I also located a couple of units in my inventory. But U 7 is not critical,
it was at the time an elegant way to perform two functions. Now that it is
not readily available the fix is to use a 6 MHz resonator between pin 9 and
10 on the PIC. 6 MHz is not critical for the over all function
My first inclination, if I were building a timing receiver, would be to make
the PPS output a nice, symmetrical square wave. But pretty much all GPS
timing receivers output an anorexic, dinky little heroin addicted supermodel
sized pulse (from 1 to 150uS wide is typical).
Feed a 5V 1Hz square wave into a 50OHM load and look at the power drain. Do
the same with a 100uS pulse and smile at the difference.
On Mon, May 14, 2012 at 5:23 PM, Mark Sims hol...@hotmail.com wrote:
My first inclination, if I were building a timing receiver, would be to
make the PPS
Le 14/05/2012 17:23, Mark Sims a écrit :
My first inclination, if I were building a timing receiver, would be to make
the PPS output a nice, symmetrical square wave. But pretty much all GPS
timing receivers output an anorexic, dinky little heroin addicted supermodel
sized pulse (from 1
Mark Azelio,
Or even 10V into 50ohm, 20us... See figure 3-4 in ICD-GPS-060.
http://www.navcen.uscg.gov/pdf/gps/ICD-GPS-060B.pdf
More modern 3-5.5V into 50ohm, 20us.
http://contracting.tacom.army.mil/majorsys/jab/DAGR%20Interface%20Specification.pdf
Above are two standards
I thought it was only standard practice, now I see that there are standards
and requirements too.
On Mon, May 14, 2012 at 6:33 PM, b...@lysator.liu.se wrote:
Mark Azelio,
Or even 10V into 50ohm, 20us... See figure 3-4 in ICD-GPS-060.
http://www.navcen.uscg.gov/pdf/gps/ICD-GPS-060B.pdf
Thanks everyone yesterday for your wwvb comment. I now know why the wwvb
signal droped to -120db.
Seems that over 4 years water slowly built up in the preamp housing. Water
and rust do make fine conductors.
May have effected bias just a bit and everything else.
Washed it all out and will let it
I bought mine because of the gain, but on +5V it performs worse than a
38 dBi antenna, quite a lot worse. I'm wonder whether it needs more
volts, or whether it's simply broken. It was ex-equipment, and not in
very good shape, but it was described as used so I'll just write off
the loss, I
I see the Trimble Resolution SMT Timing GPS OEM board 66974-35 on a
well-known auction site from a weel-know seller fluke.i, at quite a
good price, and free UK post. Is it any good - as good it seems to be.
Any experience?
Just to report back that I eventually got round to powering up one of
You don't want it symmetric. If it were then you'd not be able to
notice if it was inverted. You need the asymmetry but the next
question is how asymmetric? In theory all the information is on
the raising edge of the pulse so you cam make it as short as you like
and not loose any information.
Well, the connector is a standard connector... it's just 2mm/0.070 spacing.
I would not trust a dropping resistor. The current consumption on these units
does not appear to be constant... the temperature plot varies depending upon
what it is doing (i.e. gets warmer when acquiring
Mark Sims wrote:
My first inclination, if I were building a timing receiver, would be to
make the PPS output a nice, symmetrical square wave. But pretty much
all GPS timing receivers output an anorexic, dinky little heroin addicted
supermodel sized pulse (from 1 to 150uS wide is
Mark, Azelio and Björn,
On 05/14/2012 06:33 PM, b...@lysator.liu.se wrote:
Mark Azelio,
Or even 10V into 50ohm, 20us... See figure 3-4 in ICD-GPS-060.
http://www.navcen.uscg.gov/pdf/gps/ICD-GPS-060B.pdf
More modern 3-5.5V into 50ohm, 20us.
Paul.
On 05/14/2012 07:20 PM, paul swed wrote:
Thanks everyone yesterday for your wwvb comment. I now know why the wwvb
signal droped to -120db.
Seems that over 4 years water slowly built up in the preamp housing. Water
and rust do make fine conductors.
I had the same problem with a GPS
Magnus
Yes indeed will be working tonight. At least the preamp.Need to figure out
what was leaking yet. A bit messy but no real damage and it uses nothing
but simple parts.
It also allowed water into the coax so will need to chop 3ft off and put a
new connector on. Minor stuff.
Regards
Paul.
On
Paul,
On 05/14/2012 09:46 PM, paul swed wrote:
Magnus
Yes indeed will be working tonight. At least the preamp.Need to figure out
what was leaking yet. A bit messy but no real damage and it uses nothing
but simple parts.
Good to hear.
It also allowed water into the coax so will need to chop
mag...@rubidium.dyndns.org said:
I had the same problem with a GPS antenna at work. Somebody had put the
manufactures label over the porus plug that should have vented out any
water... but it didn't so I had too high water-level inside the antenna.
How does water get in?
I'm not doubting
Hal,
On 05/14/2012 09:54 PM, Hal Murray wrote:
mag...@rubidium.dyndns.org said:
I had the same problem with a GPS antenna at work. Somebody had put the
manufactures label over the porus plug that should have vented out any
water... but it didn't so I had too high water-level inside the
How does water get in?
Is this a Spectracom 8206? Should I worry about mine (that one that's
outdoors)?
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OK, thank you for the references.
On Mon, May 14, 2012 at 9:20 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
Mark, Azelio and Björn,
On 05/14/2012 06:33 PM, b...@lysator.liu.se wrote:
Mark Azelio,
Or even 10V into 50ohm, 20us... See figure 3-4 in ICD-GPS-060.
Magnus is right lots of ways for water to sneak in.
So I have not had time to figure it out yet. But it is a copper loop and I
suspect the place its joining the preamp box let water in over time. The
fact is even a small pin hole that allows air in and out thats humid can
allow water buildup. But
On 05/14/2012 11:04 PM, paul swed wrote:
Magnus is right lots of ways for water to sneak in.
So I have not had time to figure it out yet. But it is a copper loop and I
suspect the place its joining the preamp box let water in over time. The
fact is even a small pin hole that allows air in and
time-nuts-boun...@febo.com wrote on 05/14/2012 05:04:13 PM:
From: paul swed paulsw...@gmail.com
To: Discussion of precise time and frequency measurement time-
n...@febo.com
Date: 05/14/2012 05:04 PM
Subject: Re: [time-nuts] wwvb weak on east coast especially
when the pre-amps under
Am 14.05.2012 21:54, schrieb Hal Murray:
mag...@rubidium.dyndns.org said:
I had the same problem with a GPS antenna at work. Somebody had put the
manufactures label over the porus plug that should have vented out any
water... but it didn't so I had too high water-level inside the antenna.
Magnus,
https://assist.daps.dla.mil/quicksearch/ is the search site for
military standards. MIL-188-155 is not found. Could it be another dash
number?
Mike
On 5/14/2012 2:20 PM, Magnus Danielson wrote:
Mark, Azelio and Björn,
On 05/14/2012 06:33 PM, b...@lysator.liu.se wrote:
Mark
The other option of course is to pressurise the box with dry air to ensure
a positive pressure differential, such that the net flow is always outwards
at all points, but it's probably easier just to provide a drain hole:-)
However, whilst a drain hole will prevent the build up of a lake
On 2012/05/14 18:02, time-nuts-requ...@febo.com wrote:
https://assist.daps.dla.mil/quicksearch/ is the search site for military
standards.
Hmm. Doesn't find MIL-TGDBP-41. I got this from my (now late) great uncle, Bob
Sedgwick -- who was to hydraulics what I am to computers, only he has a
Maybe the correct number is MIL-STD-188-115?
On Tue, May 15, 2012 at 1:18 AM, Jim Hickstein j...@jxh.com wrote:
On 2012/05/14 18:02, time-nuts-requ...@febo.com wrote:
https://assist.daps.dla.mil/quicksearch/ is the search site for
military standards.
Hmm. Doesn't find MIL-TGDBP-41. I
Here's comparison for various type of conformal coating:
http://mgchemicals.com/downloads/appguide/appguide0404.pdf.https://assist.daps.dla.mil/quicksearch/
I think there is a type that is 'serviceable' and removable with alcohol.
Mike
On 5/14/2012 6:01 PM, gandal...@aol.com wrote:
The other
We use the Plastik70 from Kontakt chemie
On Tue, May 15, 2012 at 1:23 AM, Michael Blazer mbla...@satx.rr.com wrote:
Here's comparison for various type of conformal coating:
http://mgchemicals.com/downloads/appguide/appguide0404.pdf.
https://assist.daps.dla.mil/quicksearch/
I think there is
I haven't heard that one before. I try to slip in the TLAR check in all
the test procedures I write. When 'they' ask, I look at it and say:
That Looks About Right.
Mike
On 5/14/2012 6:18 PM, Jim Hickstein wrote:
On 2012/05/14 18:02, time-nuts-requ...@febo.com wrote:
Hi
I would bet that the basic electrical definition of the skinny PPS dates at
least to the mid 50's if not earlier.
Bob
On May 14, 2012, at 3:20 PM, Magnus Danielson wrote:
Mark, Azelio and Björn,
On 05/14/2012 06:33 PM, b...@lysator.liu.se wrote:
Mark Azelio,
Or even 10V into
Well almost Nigel, if you look at molecule mean velocities they are always
able to diffuse down a concentration gradient (i.e from wet into dry)
despite a small reverse presure gradient. It just takes longer under those
conditions :-))which is often enough
Alan G3NYK
- Original Message
The military deals with this all the time.
Some equipment is housed in near hermetic, gasketed, metal enclosures with
bags of drying agent, like silica gel, or purpose built, screw in
dessicators, often with a humidity indicator. The HP 117A clock has one of
them on the front panel.
For larger
Mark,
I too once preferred 50% duty cycle 1 Hz signals because they seemed more
natural. But one day during an experiment where I was comparing a large set
of clocks I noticed my lab's digital AC power meter was jumping by tens of
watts every second.
When a dozen DUT generate 1PPS along with
On 5/14/2012 8:21 PM, Tom Van Baak wrote:
one day during an experiment where I was
comparing a large set of clocks I noticed my lab's digital AC power
meter was jumping by tens of watts every second.
The last thing you want
in a precision timing lab is to load your AC line down exactly once a
Hi
If you want to avoid a crazy power supply, you decouple the power to the output
amplifier on the PPS driver. Nice big caps, droop a little during the pulse.
Charge up while there's no pulse.
Bob
On May 14, 2012, at 8:44 PM, Mike S wrote:
On 5/14/2012 8:21 PM, Tom Van Baak wrote:
one day
Tom,
Send me your masers/cesiums and it'll save you the horrendous grief that those
pesky pulsey signals are causing you...
I still like 50:50 duty cycles. It makes das blinkenlights so much easier to
see.
For conformal coating I recommend Humiseal Acrylic 1B73 in aerosol. You can
also get it in brush form. I believe that Chemtronics used to offer acrylic
coating as well, maybe even re-packaging the Humiseal product. I don't know
if there is a source for small quantities of Humiseal but it is a fine
If you can keep the boards in a vertical mount position, and they have been
sprayed with a conformal coating, the heat from the components and the
coating will keep any moisture from forming on the boards in a vertical
position. We do this in several products we supply to the military.
Dr
I haven't read all this thread, but NEMA boxes hopefully have been mentioned.
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What type of coating do you recommend? What is the downside of coating all
electronics?
Thomas Knox
From: k3...@aol.com
Date: Mon, 14 May 2012 21:16:15 -0400
To: time-nuts@febo.com
Subject: Re: [time-nuts] wwvb weak on east coast especially when the
pre-amps under wa...
If you can
These types of pulses should be routed as open-ended source-terminated
reflected wave switched transmission lines. Power will only flow for
nanoseconds as the pulse travels over the line. There won't be a drop of 50% of
the voltage at the target and no large power spikes in the unit or
That sounds like what we use in the AeroSpace industry. I remember the UV dye.
Thanks
Thomas Knox
Date: Mon, 14 May 2012 21:13:55 -0400
From: sam.rea...@gmail.com
To: time-nuts@febo.com
Subject: Re: [time-nuts] Conformal Coating
For conformal coating I recommend Humiseal Acrylic 1B73
k3...@aol.com said:
If you can keep the boards in a vertical mount position, and they have been
sprayed with a conformal coating, the heat from the components and the
coating will keep any moisture from forming on the boards in a vertical
position. We do this in several products we supply
I speculate that water runs off.
But that said the preamp did run 4 years and I didn't really do anything
special.
In fact the preamps cleaned up and ready to be remounted tomorrow. But
first I have to see what may have let the moisture in. At least was it
something large that needs to be plugged
The Humiseal and Chemtronics Acrylic both meet the Mil Spec 'AR' rating.
(I've had to track down this document trail.) I believe the MG
Chemicals also meets the same spec. The MG and Chemtronics are readily
available at most local electronic stores, Newark, Mouser and other
distributors.
hol...@hotmail.com said:
Then at the half way point, something strange happened...
I've seen quite a few GPS receivers do strange things. My straw man is
software bugs under poor signal conditions that don't get tested much.
Another possibility would be a glitch on the power rail(s). It's
On 05/14/2012 09:11 PM, Mark Sims wrote:
Attached is a Lady Heather screen dump of a Trimble Resolution-SMT timing
receiver behaving badly. The first quarter of the plot the unit was tracking
all sats above 0 degrees/0 dBc. The next quarter the masks were set to 30
degrees/30 dBc. Then
Be careful! You have now introduced a label into the discussion that
might trigger some vendor into thinking that you are looking for a UV Cured
coating. And those things can be something you don't want to mess with.
Back in the 70's when those coatings first appeared no one bothered to
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