Gentlemem,
pardon for the delayed answer, I had some extreme busy days the last week.
The floating logic is reset by the LM2925 5V regulator reset
output. There is no connection to this reset line aprt from
the Gate array reset
input and the micro (80196) reset input.
Yes, U553 on page
Me too.
I have two 545A's, one of which works and the other of which has issues with
Band 3, failing to read in a very interesting pattern suggesting a YIG
filter issue, probably the control circuit.
Just no time to chase it right now.
Please post the resolution.
Thanks.
Joe
I believe you can adjust the level of the 10 MHz output. The schematic
shows a pot at R60 or R50 (the scan isn't clear) connected to U18 which
drives the 10 MHz sine signal.
-Bob
On 12/15/2012 05:37 PM, Ziggy wrote:
Burt -
On the scope I see 950mv RMS with 50 ohm termination, 1.5V RMS with
So we are on the same page
You tie the reset through a 1 K r to vcc and you still see the reset signal?
And you do not see the 7 Khz coming from the switching regulator??
Thanks
On Mon, Dec 17, 2012 at 2:57 AM, Ulrich Bangert df...@ulrich-bangert.dewrote:
Gentlemem,
pardon for the delayed
I'm curious, which way you went and which accuracy you achieved... :-)
Can you tell us?
Volker
Am 06.12.2012 19:10, schrieb Paul DeStefano:
On Tuesday, 4 December 2012, Tom Van Baak wrote:
We are using the SR620 to measure the interval between 1PPS signals from
two clocks. One is the
A fifth solution is to use a pulse delay generator like a DG535. I use this
to create high-resolution early/late 1PPS sync pulses. They show up on eBay,
but aren't cheap. For bargains, watch for older model programmable pulse
delay generators by BNC (Berkeley Nucleonics Corporation).
Thanks.
On Mon, 17 Dec 2012 10:19:43 -0800, Hal Murray
hmur...@megapathdsl.net wrote:
A fifth solution is to use a pulse delay generator like a DG535. I use this
to create high-resolution early/late 1PPS sync pulses. They show up on eBay,
but aren't cheap. For bargains, watch for older model
Hi
With R-C delay generators, temperature coefficient is likely to be an issue.
NPO will get you to 30 ppm/C. Most resistors will be up in the 50 or so ppm / C
range. On top of that you have the contributions of what ever strays might be
running around.
If you are trying to set up say a 1 us
You knew it would be coming..
A discussion over lunch brought up the question of precisely WHEN this
Maya calendar rollover/civilization ending event would occur. It's not
enough to just say dec 21st.. Does the event occur at the beginning of
the day, end of the day, in which local time
In message 50cf7327.2050...@earthlink.net, Jim Lux writes:
Anybody have any decent links to go hunting for?
Have you checked Calendrical Calculations ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer | BSD
You would not want to do this for long delays obviously. A digital
counter with the delay used as a vernier would be more appropriate
there. That gets complicated fast if the input is asynchronous.
Analog first order compensation of the temperature coefficient is
straightforward using the same
And it's on my birthday, too. So should I open my presents at breakfast
instead of dinnertime/ Will I get cake???
:-)
merry Christmas to all of you...
DonL
Jim Lux
You knew it would be coming..
A discussion over lunch brought up the question of precisely WHEN this
Maya calendar
Nice pulse delay generator:
http://www.edn.com/file/14660-Figure_1.pdf
The article that goes with it:
http://www.edn.com/design/analog/4323671/Dual-flip-flop-forms-simple-delayed-pulse-generator
The delay is analog - charging a capacitor until it crosses a threshold. So I
don't know if it is
Hi
I believe you will find that NPO's are your best bet by far for short delays.
The R's and C's on a simple semi are going to have some pretty major tempco's.
If they go with a fancy process they can change that. Normally to keep things
cheap they use the simple process.
Bob
On Dec 17,
I don't know of any good online sources. Most of the work on the Mayan
calendar is published by archaeologists in books or in professional
journals that require online subscriptions.
There is growing evidence that the Mayan calendrical system began as two
different systems. One was a rough
On 12/17/12 12:03 PM, Don Latham wrote:
And it's on my birthday, too. So should I open my presents at breakfast
instead of dinnertime/ Will I get cake???
:-)
merry Christmas to all of you...
As the sun rises over the heel stone at Stonehenge, I should think..
After all:
In ancient times...
On 12/17/12 12:33 PM, kevin.bi...@qc.cuny.edu wrote:
In the ethnographic record, the solstice is not a point in time, but the
day of the sun's shortest path. I'm not sure of what the start of the day
was. The Mayan word for day, kin, seems to refer to the entire movement
of the sun from
li...@rtty.us said:
If you are trying to set up say a 1 us delay, you will get ~ 50 ps per
degree C in your delay. That's a lot .
A while ago, t...@leapsecond.com said:
A long delay cable is fine too. If these are timing receivers you probably
don't need more than 100 ns of delay, once
the winter sun rises 180 degrees from the heel stone, don't it? through
the trilithon...
but yeah. I'd like to be there once for winter solstice sunrise. Been
there to visit back when one could walk around...
Don
Jim Lux
On 12/17/12 12:03 PM, Don Latham wrote:
And it's on my birthday, too. So
Its actually a relatively low performance implementation of a classic
technique.
The ramp capacitor reset switch (a saturated transistor) has a
relatively slow turnoff and poorly defined reset voltage.
For shorter time delays lower capacitance current source and reset
devices are required.
Dear listmembers,
I am looking for any and all information available on a FEI FE-5607
Rubidium Frequency Standard, (rugged/mil unit), with a TNC RF output
jack and a circular mil. multi-pin power/control connector.
It looks kinda similar to the current (?) FEI-Zyfer FE-5600M, but I
have
Am 17.12.2012 19:56, schrieb David:
My next pretrigger generator is going the differential comparator or
differential ECL route with a fast ramp and precision reset. I expect
jitter to be significantly better than 10s of picoseconds for delays
up to about 100 nanoseconds. If I get down to 10
BTW, Lady Heather has support for several versions of the Mayan and Aztec
calendars. Also Druid, Herbrew, Islamic, Indian, and many others.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe,
But does it have an output of Sidereal Time?
cheers,
Neville Michie
A Merry Season to all.
On 18/12/2012, at 11:02 AM, Mark Sims wrote:
BTW, Lady Heather has support for several versions of the Mayan and Aztec
calendars. Also Druid, Herbrew, Islamic, Indian, and many others.
On 12/17/12 4:02 PM, Mark Sims wrote:
BTW, Lady Heather has support for several versions of the Mayan and Aztec
calendars. Also Druid, Herbrew, Islamic, Indian, and many others.
so we can have a GPS disciplined rollover of the long count?
Hi
The nice thing about a spool of coax is that it's got a bit of thermal mass. It
will average out a lot of minor temperature ups and downs.
Bob
On Dec 17, 2012, at 4:34 PM, Hal Murray hmur...@megapathdsl.net wrote:
li...@rtty.us said:
If you are trying to set up say a 1 us delay, you
I wish there was an source for helically wound shielded differential
transmission line like the type used in later analog oscilloscopes.
The only place I know where to find it is oscilloscope part mules.
Essentially it was transmission line with a ridiculously low velocity
factor. It is great
Like this?
http://www.ebay.com/itm/Tektronix-Delay-Line-for-475-Oscilloscope-New-/290824098279?pt=LH_DefaultDomain_0hash=item43b67791e7
Em 17/12/2012 23:39, David escreveu:
I wish there was an source for helically wound shielded differential
transmission line like the type used in later
Hi
At some point the whole get it onto the board / get it off the board thing
becomes the main issue. Then it's easier to just make the delay line part of
the PC layout.
Bob
On Dec 17, 2012, at 8:39 PM, David davidwh...@gmail.com wrote:
I wish there was an source for helically wound
That is the stuff but Tektronix had some with an even smaller
diameter. It would be nice to have a new source as I would hate to
cannibalize oscilloscopes for it.
On Mon, 17 Dec 2012 23:43:21 -0200, Daniel Mendes dmend...@gmail.com
wrote:
Like this?
I have seen the small diameter, about like RG-174, delay cable used
for patching PC boards after the fact. That is how I know it exists.
:)
I just have not found a source for it.
On Mon, 17 Dec 2012 20:47:34 -0500, Bob Camp li...@rtty.us wrote:
Hi
At some point the whole get it onto the board
You're missing something important! Due to possible errors in their long term
calculations we may have actually missed the end! Passed right by with nobody
noticing...
Peter
On 12/17/2012 2:31 PM, Jim Lux wrote:
You knew it would be coming..
A discussion over lunch brought up the
Yes, you can have a GPSDMC (GPS disciplined Mayan calendar). You can also
specify your preferred calendar correlation constant (a +/- offset to the start
of the calendar) to satisfy the whims of when your favorite deity demands
sacrifices.
Also, Lady Heather does sidereal time (LMST or
On 12/17/12 5:39 PM, David wrote:
I wish there was an source for helically wound shielded differential
transmission line like the type used in later analog oscilloscopes.
The only place I know where to find it is oscilloscope part mules.
You mean RG65
I heard that there was some discrepancy about the exact date and it may
actually be happening a few days earlier.
Happy Birthday Don -- hope you get your cake and a very Merry Christmas to
everyon%^67tenuj6o867gOseV87i7r87PGThliT8b;]{-=.
---NO CARRIER
-Original Message-
From:
But just like other time scales, how did those mesoAmericans reconcile
their 360 day cycle to 365.25... day intervals between solstices?
They had a five day ong party wherethey didn't work. They took those days
off. Not kidding, they resync'd every year. Kind of like leap days all
stuck on
jim...@earthlink.net said:
You mean RG65 http://www.awcwire.com/ProductSpec.aspx?id=M17/
34-RG65-Coaxial-Cable or RG186 http://www.awcwire.com/ProductSpec.aspx?id=RG1
86-Coaxial-Cable
Interesting stuff. Thanks.
RG-65 says no longer available. It also says:
Coaxial Delay Line 0.15
On 12/17/12 9:40 PM, Hal Murray wrote:
jim...@earthlink.net said:
You mean RG65 http://www.awcwire.com/ProductSpec.aspx?id=M17/
34-RG65-Coaxial-Cable or RG186 http://www.awcwire.com/ProductSpec.aspx?id=RG1
86-Coaxial-Cable
Interesting stuff. Thanks.
RG-65 says no longer available. It also
Hal Murray wrote:
jim...@earthlink.net said:
You mean RG65 http://www.awcwire.com/ProductSpec.aspx?id=M17/
34-RG65-Coaxial-Cable or RG186 http://www.awcwire.com/ProductSpec.aspx?id=RG1
86-Coaxial-Cable
Interesting stuff. Thanks.
RG-65 says no longer available. It also says:
Cond. MaterialMagnet Wire Helix
(What is magnet wire, and what does helix mean and how does it effect
coax?)
Magnet wire is enamelled wire (usually copper).
I'm familiar with that usage, but I don't know why it's interesting in the
context of coax.
I think the key idea is that the
On Tue, Dec 18, 2012 at 1:27 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
But just like other time scales, how did those mesoAmericans reconcile
their 360 day cycle to 365.25... day intervals between solstices?
They had a five day ong party wherethey didn't work. They took those
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