Many thanks to everyone who provided suggestions regarding time-and-tech
(and other) things to see in Switzerland!
I am working through the suggestions. My wife (and mostly) I hope to pack
in as many of them as possible.
I also look forward to meeting any of you who plan to attend the
Serial outputs can usually drive several serial inputs if the cables are
short (to avoid reflections). You can wire it yourself, serial out from
the TB to both LH and NTP, serial in from LH only.
David
On 2/26/14 11:51 AM, David J Taylor wrote:
I'm running Meinberg NTP on the Windows 7 x64
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reflections will
degrade its risetime.
Good luck,
David
On 3/3/14 1:01 PM, d0ct0r wrote:
Hello,
I am looking for the advise: what will be the better method to connect
GPSDO module by short extension cable to put its antenna input on
front or back panel ?
Lets say, GPSDO module has female
From an ad in Radio-Electronics June 1980, it mentions that it
phase-locks to the carrier. I expect the new format of WWVB will give
it fits.
https://archive.org/stream/radio_electronics_1980-06/Radio_Electronics_June_1980#page/n71/mode/2up/search/wwvb
73,
David N1HAC
On 3/11/14 1:55 PM
From an ad in Radio-Electronics June 1980, it mentions that it
phase-locks to the carrier. I expect the new format of WWVB will give
it fits.
https://archive.org/stream/radio_electronics_1980-06/Radio_Electronics_June_1980#page/n71/mode/2up/search/wwvb
73,
David N1HAC
On 3/11/14 1:55 PM
There is a UK version of the almanac: http://asa.hmnao.com/
David N1HAC
On 3/24/14 7:26 AM, Tim Shoppa wrote:
Try the _Astronomical Almanac_. I am not so familiar with the
navigation almanacs, but the bread and butter of the astronomical
almanac is the equation of time and transformation
There is a UK version of the almanac: http://asa.hmnao.com/
David N1HAC
On 3/24/14 7:26 AM, Tim Shoppa wrote:
Try the _Astronomical Almanac_. I am not so familiar with the
navigation almanacs, but the bread and butter of the astronomical
almanac is the equation of time and transformation
I am surprised it took them this long. A number of satellite telemetry
systems can use doppler as a matter of course for locating transmitters,
such as Iridium and Argos.
David
On 3/25/14 12:58 AM, Peter Gottlieb wrote:
This is how ELT locating satellites work (when not relaying the newer
The output looks differentiated, as would happen if the wire connecting
the internal circuit to the output pin became open, leaving only a very
small capacitance to couple the square wave out.
Dave
On 4/8/2014 11:46 PM, Chris Albertson wrote:
My Bliley square wave 10MHz OCXO was working just
Yea! I remember when they shut it down at the nadir of the sunspot
cycle, saying no one was using it. Duh!
David N1HAC
On 4/11/14 12:07 AM, Max Robinson wrote:
WWV used to be on 25 MHz but when the sunspot cycle hit a minimum they
shut it down. That was years ago. I'm glad to know
Easily heard on a 12 ft wire in NH this afternoon. Chuck - You may be
too close and it is skipping over.
David N1HAC
On 4/11/14 8:37 PM, paul swed wrote:
Chuck
The an/urr R1051 does not have a signal meter. It has level meters for
audio.
Those navy radios. I guess they figured the radio
I found this reflector after searching for GPSDO that would be suitable for
individual purchase/use. Each time I found an article about GPSDO projects,
that lead me to a surplus GPS module that is either no longer available, not
current production, undocumented, or otherwise difficult to
I have done that as well. The G-Shocks have a trimmer cap (I have a
DW-6900/module 3230). I don't remember the frequency at the adjustment
test point but it is something like 100 Hz.
David
On 4/18/14 7:40 PM, Jim Palfreyman wrote:
I've opened up my Casio G-Shock watch, found an electrical
Some timing GPS units (eg Oncore UT) can be set to omit 1PPS pulses if
no satellites are being tracked, or if the RAIM alarm limit is exceeded.
Dave
On 4/25/2014 10:20 AM, Paul wrote:
On Tue, Apr 22, 2014 at 9:57 PM, Tom Van Baakt...@leapsecond.com wrote:
I have noticed skipped 1PPS on the
I have interfaced a Motorola Oncore UT PLUS module to my Linux PC via serial
port and RS-232 adapter. When I power up the module I see 1 PPS from the pin
(currently connected to a LED via current limiting resistor.) The port is set
to 9600 bps 8/N/1 but no messages are being seen (I think this
I'm trying (in lieu of setting up a GPSDO) to use the 1 PPS output of a
Motorola ONCORE UT+ module to do a one-time reference oscillator adjustment of
my frequency counter (setting its reference oscillator which has a small
trimmer).
My counter has a totalize mode where it counts pulses from
I'm using 74HC series for the divider/gate.
I appreciate all the troubleshooting help, however, I still don't know under
what conditions the 1 PPS output should be relied on (with zero satellites
acquired? one? four? all eight?, and what can be expected of the 1 PPS output
interval if there
Picked this project back up this afternoon after couple of weeks, narrowed the
problem down but not solved.
Refresh: My ONCORE UT+ module appears to have very extreme jitter (on on order
of 100 uSec, not nSec random variation between leading edges of successive
pulses) in the 1 PPS output. I
Thank you, Tom - I appreciate the advice.
I am using a 74HC390 in the (divide-by-20, square wave output) divider chain,
and sure enough, after looking more closely at the data sheet, it clocks on the
FALLING edge (I thought otherwise - wrong)! I will stick an inverter in the
path and that
Thanks to Tom, Jean-Louis and Chris for all of the helpful advice.
Problem is now fixed.
First problem was obvious - the 74HC390 I use as a divider clocks on
negative-going transition. Added inverter, and the problem appeared to still be
present (!)
Next problem was not so obvious - my very
about 4 days to
manufacture and they are then shipped by airmail.
Have a look at :- http://imall.iteadstudio.com/open-pcb/pcb-prototyping.html
David
t 04:49 AM 19/06/2014, you wrote:
ewkeh...@aol.com
David G. Hopkins (VK4ZF)
CAPALABA QLD
AUSTRALIA
27.32.38S 153.12.03E
QG62OL
Skype :- davhop
Hi Bert,
Welcome back.
I'm willing to help on the LCD interface code, if you'll send me--
(1) a schematic of the board,
(2) a datasheet on the LCD (or link to where I can get one)
--that includes information on control and data interfacing
(3) any existing code for this PIC (so I can
Hi everyone,
This may be a rookie question... I am trying to measure phase noise using
Timelab and Agilent 53230a but I get a This plot contains xDEV/phase/frequency
data only -- no phase noise or AM noise records. I tried the following
settings and other variations but still get the same
for a few months. I was considering adding it to
my leap second measurements, but there didn't seem to be much point.
David.
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Such as?
david
On 7/08/2014 9:30 PM, bruce-cpdlzquo8hwavxtiumw...@public.gmane.org wrote:
I have a couple of these. however their noise spectral density tends
to rise precipitously below 1Hz or so. There are regulators with
significantly
lower flicker noise.
Bruce
On August 7, 2014
on the promise.
David McGaw
On 8/14/14 1:34 PM, Iain Young wrote:
On 14/08/14 17:24, David J Taylor wrote:
The National Physical Laboratory (NPL) has signed a distribution
agreement with trading technology company Intergence to deliver NPLTime®
- a new service providing a precise time signal directly
So we're nuts. I thought that was a given.
David
On 8/29/14 9:58 PM, Mark Sims wrote:
Frankly, anybody that builds up a Simple Switcher type converter from scratch
is more than a little nuts and/or awfully lonely. You can buy small,
adjustable pre-built boards (buck or boost configs
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Let's try this again:
They are HP/Agilent/Keysight PN 10811-80008. I was actually able to buy
a couple from Agilent a few years ago. They are listed as obsolete
now. A Panasonic EYP2BH115 should fit. Newark has them.
David
On 9/2/14 8:05 PM, Dave Daniel wrote:
I believe a thermal cut
Actually, in the unit in which the fuse had opened, it had protected the
unit when the thermistor failed open. Having seen this happen, I
recommend it be replaced. The Panasonic part is 63 cents.
David
On 9/3/14 7:33 AM, Bob Camp wrote:
Hi
In all the years I’ve been doing
and resonates with the increased junction capacitance at low
voltage.
David
On 9/12/14 6:52 PM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
Dr David Kirkby
Managing Director
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3
6DT, United Kingdom
?) always OCXOs.
David
On 9/28/14 6:16 AM, Hal Murray wrote:
drkir...@kirkbymicrowave.co.uk said:
Two people responded - one says a OCXO and the other an TCXO!!
The warmup time is I think an hour, but clearly that is not the time for an
oven to warm up.
An hour seems like a reasonable OCXO warm
Would it not be better for phase noise to use a logic gate with a fast
transition than a resistive divider that would be slower due to the load
capacitance?
David
On 10/1/14 7:09 AM, Bob Camp wrote:
Hi
Ok, so it’s not a super duper low phase noise OCXO. It’s also at a reasonably
high
Jupiter emissions are MHz. Ku band is GHz.
David
On 10/10/14 5:17 AM, Graham wrote:
Good morning Brooke,
Sorry, don't know the answer to that question. Interesting question
though.
I am aware of the Radio Rove project and have played around at
listening for Jupiter on HF and LO VHF
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The highest accessible peak in the Adirondacks I think would be
Whiteface at 4,867 ft, though that would be by ski lift and not all the
way to the top. The highest point accessible by car in the Northeast
would be Mt. Washington here in New Hampshire at 6288 ft. Hmm...
David
On 11/3/14 1
As long as the chip in question is still available in surface mount, one
can use a SM to DIP adapter. I use these all the time to evaluate and
prototype with SM chips. It would be expensive to rechip a whole unit,
but onesies in case of a failure is OK.
David
On 11/9/14 10:36 PM, Bob Camp
Hi All,
Does anyone have a download link for the Seistek PN3048 phase noise
software, or details about contacting the author?
I'd like to use it to configure my 11848A, although I don't know how far
I'll get without having a 3561A (just an 8568B).
Cheers,
davidh
On 17 October 2012 20:35, Jim Lux jim...@earthlink.net wrote:
I just found an old 8720C at work, and I was thinking of pressing it into
service to do some experiments with measuring changes in receiver filters
and antenna match over temperature. (Since I don't have to pay rental on
it, it can
That would be a Motorola MV1650 or equivalent. You may have to select
for 100pf +/- 5% @ 4V as the standard spec is 10% but it probably does
not matter as the tuning ratio will be greater than the 2 spec.
David
On 10/18/12 3:18 PM, Adrian wrote:
Hello,
I found the 10811 in my 8662A
As I mentioned, the varactor is equivalent to the Motorola MV1650. I
have a bunch as well left over from building VCXOs. :-)
David
On 10/19/12 3:37 PM, Rick Karlquist wrote:
Slightly off topic: the oscillator transistor has some 1854-
part number, but is actually a 2N5179 selected
Perl to manipulate the raw data, but don't have the maths skills to do
the analysis myself.
Thanks,
david (still an apprentice TN, but probably addicted already).
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with
that I want to use the 3-corner method to start sorting the wheat from
the chaff.
david
I have an HP 58503A and a Symmetricom 58503B which are behaving quite
differently to one another using a common antenna. Using Z38xx, there's
almost an order of magnitude difference between the reported
Tom,
It looks like they have a pForth interpreter running in there under
PSOS: http://code.google.com/p/pforth/. Is there a mechanism to switch
from SCPI to the Forth interpreter?
david
Trimble and HP took different approaches on their GPSDO's.
Trimble lets you get into things and fiddle
The subject pretty much says it all. I'm not sure how important low
noise amps are for time nuts. I never see noise figure meters
discussed, but I would expect noise in amps adds to phase noise, which
time-nuts do care about.
Dave
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time-nuts mailing
On 2 November 2012 13:46, Volker Esper ail...@t-online.de wrote:
Fellow time-nuts,
I am new in this mailing list and a little bit unfamiliar with it, so I hope
I'm not doing something stupid.
How do I start a new topic? Simply send a mail with a new subject?
Thanks a lot
Volker
Yes,
On 2 November 2012 13:46, Volker Esper ail...@t-online.de wrote:
Fellow time-nuts,
I am new in this mailing list and a little bit unfamiliar with it, so I hope
I'm not doing something stupid.
How do I start a new topic? Simply send a mail with a new subject?
Thanks a lot
Volker
Yes,
Folks,
Given that slew rate is so critical, why do we distribute sine waves and
perform the zero-crossing detection at every target instrument?
david
Trigger jitter is the noise at the trigger point. it's a combination
of thermal noise and the slew-rate at the trigger points. It is often
If you can measure the 10811 frequency as a function of the control
voltage with the 10811 control voltage input disconnected from
everything else, you'll have a curve that will allow you to translate
control voltage changes into frequency drift.
My impression is that the 10811 ageing is
Someone at my radio club uses some mode of operation where accurate
time is required. He said the standard Windoze clock does not keep
sufficiently accurate, so he has software which updates from an NTP
server every 4 seconds or so. It's not exactly a denial of service
(DOS) attack, but seems
On 7 November 2012 23:28, bjon...@mindspring.com wrote:
We had a presentation at our radio club several months ago on digital HF
modes, and part of the presentation was on JT65 and apparently it needs
a precise synchronized time fix on both ends for an exchange to occur.
I do not recollect
On 7 November 2012 22:52, David davidwh...@gmail.com wrote:
Some finicky software becomes upset if time is stepped backwards too
far.
Although noting to dowith my original post, if I set the time too far
back on a CentOs 5 (Redhat clone), it will not boot properly next
time, as it detects
negotiations, who again need to be paid.
6) After fixing the hardware fault, Agilent will have to recondition
the unit to sell it to someone else.
I supsect the eBay/Paypal group have made at least $1000 from all this.
Dr. David Kirkby - not a happy Paypal or Agilent customer
On 17 November 2012 14:31, Tom Holmes thol...@woh.rr.com wrote:
I would strongly suggest that you consider buying Agilent Certi-Prime items
not through EBay but through one of the distributors that they now sell much
of their equipment through.
The discounts on eBay (48% was agreed, prior to
This is some of the communication between me and Agilent on eBay. I
think it is clear Agilent wanted to use Paypal, and I did not. It was
Agilent who said I should split the payment into two - one of $10,000
and the other of $7,736
Credit cards were not mentioned, but this would have been above
You can get a Paypal account without a credit card. I think all you
need is a bank account.
In fact, every time I try to buy something with Paypal, it defaults to
taking the money from my bank account, and every time I need to change
it to take it from my credit card.
I appear to have a $10,000
On 17 November 2012 23:37, Don Latham d...@montana.com wrote:
I'm wondering if agilentused is really part of the Agilent corp or
whatever it's called? or an independent company entirely? My only and
last $.02!
Don L
J. Forster
It is Agilent - at least to the extent I can determine. Some
On 18 November 2012 01:02, J. Forster j...@quikus.com wrote:
As I said, try calling Executive Complaints at the US HQ. LD calls are
cheap these days. You have nothing to lose, IMO.
-John
But I can imagine I would be a very long time on a phone trying to get
someone able to deal with it. I
On 18 November 2012 01:04, Kevin Rosenberg ke...@rosenberg.net wrote:
agilentused also wanted me to use PayPal. I used two transactions. The first
for the item and the second for software options. I would have also preferred
credit card for the cash back, but agilentused wanted PayPal.
I know people on here complained it was not a Paypal mailing list, and
it should stop. But I thought I'd post this. If you want to comment,
drop me a private email, and not on the list.
==
Dear David,
We would like to offer you compensation for the loss you have incurred
from the Paypal
Hi Bert,
What kind or sort of documentation is needed?
schematics?
PC layout?
software / firmware documentation?
I've been programming PICs intermittently for 10+ years. Some of my
projects use 2 or 4 line LCD displays. I have given other
microcontrollers a short test spin.
I've also done
Hi,
I am have thinking / tinkering / planning a wwvb receiver for longer
than I am willing to admit!! It seems to me that one could take a
ferrite loop, JFET buffer, ADC and a small microprocessor to get down to
baseband - say 20 Hz complex sampling rate - and then output on a serial
port
I've got an HP 8720D VNA. This has been out of support from Agilent
for 8 years, so its getting on a bit. There's a clock in the
instrument which keeps the date and time. This is losing about 1 day
per month (rough guess), so it has slowed by a bit over 3%.
I'm guessing this is likely to be a
On 26 November 2012 16:00, J. Forster j...@quikus.com wrote:
Have you contacted ArtekMedia for any manual information?
No. First I'll try to get a free one!
Also, have you checked/posted a question to the VNA Agilent Forum?
Yes. Only a few hours ago (just before I posted on time-nuts I
On 26 November 2012 15:44, Peter G. Viscarola pete...@osr.com wrote:
Hi TimeNuts,
What are people using for surge arresters between your GPS receiver and the
antenna, at the entrance to your house?
Several years ago there was lightning near my house, which I think
went on the telephone
On 27 November 2012 09:15, David Kirkby david.kir...@onetel.net wrote:
If I was reallly concerned, then I'd look at using an optical
interace. Use a battery to power the GPS antenna, modulate a laser and
detect the RF on a photodiode connected by a metre of so of optical
fibre.
Of course, I
On 6 December 2012 18:28, Murray Greenman denw...@orcon.net.nz wrote:
Keenan,
You can see my GPSDO source code for a mere $50. It comes with manual and
executables. The executables alone are $20.
See http://www.qsl.net/zl1bpu/MICRO/SIMPLE/SimpleGPS.htm
Murray ,
There's a huge difference
if it legal to do so. The answer is yes, you can use
gcc for commerical closed-source software.
Dave
David Kirkby wrote:
On 6 December 2012 18:28, Murray Greenman denw...@orcon.net.nz wrote:
Keenan,
You can see my GPSDO source code for a mere $50. It comes with manual and
executables
On 7 December 2012 15:00, Scott McGrath scmcgr...@gmail.com wrote:
What most people think about when they hear about open source is code
released under variants of the GPL which require that code released to the
public built with GPL tools be made available for no more than the cost of
On 8 December 2012 01:09, Chris Albertson albertson.ch...@gmail.com wrote:
BTW you CAN make as much money as you like with GPL'd software. Just look
at all Android phones. They contain Linux and a pile of other GPL'd
software. Apple is using BSD Unix in there products.
That's an important
On 8 December 2012 08:36, Poul-Henning Kamp p...@phk.freebsd.dk wrote:
And one other detail most people overlook, is that the default GPL text
gives any users the right to use any later version of the GPL license
instead of the one you copypasted. This has only happened once but
it had
On 10 December 2012 09:24, David C. Partridge
david.partri...@perdrix.co.uk wrote:
Related to time-nuttery as astonomical observation was used for time-keeping
until C20.
Sir Patrick Moore, the great amateur astonomer died yesterday at the age of
89.
Although considered an amateur, I
Hi,
Does anyone have a set of schematics for this guy?
My bolt has suffered a significant loss of sensitivity,
the AMU values have dropped 30 dB. It is not
the motorola antenna or feedline, works fine on an Oncore.
This appeared to have happened when I tried to operate 160 meters!
Thanks
I have tried to work with 4 Star Electronics. They only want to deal
with large quantity orders. I would be interested to hear if anyone
has had better luck.
David N1HAC
On 12/18/12 4:42 PM, John Miles wrote:
[1]www.octopart.com identifies 23 of them in stock at a reseller
A Day in the Life of Five PPS Sources..
This probably does not qualify as a regular TimeNuts submission as there
are no Tau's or 10^-12ths but I could not resist a simple scope capture of
the Pulse Per Second output of my new SSR-6t toy from Synergy Systems as it
performed its first
The video permissions should be fixed so it is no longer private ... Sorry
A Day in the Life of Five PPS Sources..
See http://youtu.be/kOG9ImT2lvY
This is video is a two minute replay of the PPS behavior of two PRS-10s,
two TBolts, and the SSR-6t during it's initial 24 hour
adapter cable.
See
http://www.data-alliance.net/servlet/-strse-800/MCX-BNC-female-Adapter/Detail
- Sent from my iPhone -
Please Reply To
David Martin
drmar...@ivietechnologies.com
801-372-0978
Just curious,
what connector/pigtail/adapter board did you use to access the 2x5 1.27mm
pitch connector
Any idea of what drove the larger drift between the Tbolts and the
PRS10 at 1:26 through1:29?
Be interesting (to me at least) too see the same post survey. Neat idea.
Brent
The stack of TBolts is located in the corner of an unheated basement
shop. There is no direct heating vent to cause
The Mayan calendar, if that is what you are talking about, rolls over
at the solstice - Dec. 21, 2012 11:12 UTC.
David
On 12/20/12 1:20 PM, dlewis6767 wrote:
CNN should be on top of it.
--
From: Burt I. Weiner b...@att.net
Sent
Paul
WB8TSL
On Thu, Dec 20, 2012 at 2:57 PM, David McGaw
[1]n1...@alum.dartmouth.org wrote:
The Mayan calendar, if that is what you are talking about, rolls
over at the solstice - Dec. 21, 2012 11:12 UTC.
David
On 12/20/12 1:20 PM, dlewis6767 wrote:
CNN should
How did he set up the video? What camera?
The Rigol DS4024 Scope has a Record Function.
Basically it stores internally a screen capture for each trigger event.
Therefore the Scope itself takes a picture once a second when triggered
by PPS events.
You can then set the Scope to Replay the whole
On 21 December 2012 18:11, Chris Albertson albertson.ch...@gmail.com wrote:
I think whatthis says is that if you've worked hard to make a design
available to others and you don't intend to sell it commercially,
PUBLISH the details, the design files and the source code. Yes I
kknow it is
The HP 7 series modular measurement system allows one to configure
a range of modules to do various things such as spectrum analysis.
There's an oscillator in the unit somewhere (I don't know where), but
for higher accuracy one can buy an HP 70310A precision frequency
reference, like this,
On 30 December 2012 03:04, ewkehren ewkeh...@aol.com wrote:
I do feed a Rb in to all my istruments including my 7 spectrum analser. I
had two choices 301 or create 100 Mhz.
I'm not sure what a 301 is, so it means little to me.
There blank modulrs available but make sure you get one with
On 30 December 2012 15:43, Pete Lancashire
If you know your always going to have an external 10 MHz, what you
need is a 70310A Option 002. Option 002 deletes the oscillator (and
the battery pack).
But I've only once seen an option 002. My take is if you had the $'s
to buy a MMS setup, you
What do you mean fill up the sample bag limit? You can request as few
items as you want.
David N1HAC
On 1/5/13 4:54 PM, Lizeth Norman wrote:
Bob,
Tricks like these I need to know about! One I need as a rx unit. The
other is just for testing and verification. Would save a few bux.
Norm
I wondered because they (we - I used to work there) do not charge
shipping on sample orders from the website.
David
On 1/5/13 5:13 PM, Lizeth Norman wrote:
David,
I figured since I'd have to pay for dev boards. (around 400 US plus
ship) I might as well as pick up a few freebies! Have a few
that it supports IEEE1284 but they lie.
David
On 1/11/13 1:40 PM, Jim Stephens wrote:
On 1/11/2013 8:46 AM, Chris Albertson wrote:
On Fri, Jan 11, 2013 at 5:09 AM, J. L. Trantham jlt...@att.net wrote:
My goal is to connect a parallel port chip programmer via USB but the
software only looks
Those should be real ports. They probably connect through the PCI buss
as a PCMCIA card would.
For those looking to PCMCIA/Card Bus, be careful. There ARE cheap cards
that connect through USB rather than PCI. The true PCI cards DO work.
David
On 1/11/13 2:42 PM, Rick Karlquist wrote
There's a fairly interesting (to me at least), discussion on an
Agilent forum devoted to the calibration of vector network analyzers.
http://www.home.agilent.com/owc_discussions/thread.jspa?threadID=34809tstart=0
The title of the thread is Coefficients of fringing capacitance polynomial
A
On 23 January 2013 15:22, Jim Lux jim...@earthlink.net wrote:
On 1/23/13 6:48 AM, David Kirkby wrote:
A student needs to find the open-circuit fringing capacitance of a
piece of microstrip line. For this he needs to know the time between
the reference plane of the SMA connector and the open
On 24 January 2013 11:32, Grant Hodgson gr...@ghengineering.co.uk wrote:
Dave
Hi Grant
Couple of thoughts here :-
1) A 'real' TDR measurement would require a pulse generator with a fast
rise/fall time. The faster the rise/fall, the better.
Yes, I suspect it needs a pretty decent TDR for
On 26 January 2013 18:31, DARRELL ROBINSON darr...@shaw.ca wrote:
I did a Google search and came across sciencenuts.org, but content was
limited
If you have no success, maybe science-nuts could be created. There would be
at least two of us joining.
Make that three.
Dave
Yes, indeed. Scientific balloons get up to about 125,000 ft, 38 km max.
David
On 1/29/13 5:39 PM, Said Jackson wrote:
Ublox limits it to 164,000 feet or 50,000m. Pretty much higher than any ballon
would go I think.
Bye,
Said
Sent From iPhone
On Jan 29, 2013, at 13:24, Mike S mi
On 31 January 2013 04:28, Chris Albertson albertson.ch...@gmail.com wrote:
On Wed, Jan 30, 2013 at 6:16 PM, Richard (Rick) Karlquist
rich...@karlquist.com wrote:
I know this topic has been discussed in the past on the list, but
a colleague is asking if there are any off the shelf low
noise
On 31 January 2013 17:11, John Ackermann N8UR j...@febo.com wrote:
And this (very interesting) thread brings up the question of measurement
methods. Some time ago I searched around and didn't find much on a standard
way to measure noise on low voltage DC supplies.
John
Did you try the
ITAR limits are AND. If it is below 50,000 ft OR below 1000 knots, it
will work.
My Garmin GPS60CSx has always worked on commercial flights at 40,000 ft
and 500 MPH. We use commercial Trimble units on our scientific balloons
that go up to 120,000 ft (38 km).
David McGaw
NASA BARREL
There are numberous web servers that are small and light weight, some
examples are boa ( www.boa.org ) and HTTPd
http://www.nongnu.org/mini-httpd/
On Mon, 2013-02-11 at 14:01 -0800, Jim Lux wrote:
I'm intrigued by the possibility of using a lightweight web server to
provide a management/user
On 20 February 2013 00:58, Paul Cianciolo pa...@snet.net wrote:
The purpose of this apparatus is to print a rolling chart on the screen of a
computer of heart BPM and then try different technicues of meditaion and
calming technicues to lower my heart rate for short periods of time.
Just a
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