Re: [time-nuts] To use or not to use… Thread Set. Thank you!

2012-10-09 Thread Edgardo Molina
Dear Hal, Thank you for your interest! I was originally planning for sending a URL pointing to a picture slideshow I will be preparing in one of our company web hosting servers. If it is interesting for you, I will then start working on it as I get more pictures at CENAM. Judah Levine arriv

Re: [time-nuts] To use or not to use… Thread Set. Thank you!

2012-10-09 Thread Hal Murray
xe1...@amsat.org said: > I could upload the pictures I took to an image hosting server, showing a > little bit of Mexico's time scale UTC (CNM) and the current work with Cesium > fountain and frequency comb clocks. My apologies beforehand if my offer > could be a little of topic and probably way o

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Hal Murray
albertson.ch...@gmail.com said: > The satellites are in 12 hour orbits. Everything repeats every 12 hours. > But the sun is on a 24 hr. period and if you did two 12 hour tests you don't > want to do one at night and one in day. So start each test at the same > time of day let it run for 12+ hou

Re: [time-nuts] To use or not to use… Thread Set. Thank you!

2012-10-09 Thread Edgardo Molina
Dear Friends, Thank you all for all your replies and points of view regarding this thread. I was unable to reply to you individually as I got too many answers in a very short time. StilI had the chance during the day to summarize all your information and presented what is more than representati

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Ed, k1ggi
Hi Corby, Before you go to all the trouble of venturing into unfamiliar waters, code a few inps and outs to poke a 2 into the uart divisor latch and give it a try. I just tried poking 3 to pull in some 38.4k NMEA strings and its fine. Using v3.22 and W7/32. Ed -Original Message- From: time

Re: [time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread gary
Hard to tell, but some of those images to me makes it look like the display is ghosting. You need to add some dead time between strobing digits. I'm partial to using a MAX7219, but watch out for the serial interface, since it is somewhat non-standard. I don't recall the details exactly, but it

Re: [time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Graham / KE9H
On 10/9/2012 6:04 PM, Mark Sims wrote: Lady Heather supports a digital clock display. You can zoom it to full screen. It would not be difficult to add the two time zones to that display. You could use three of these: http://www.sparkfun.com/tutorials/47

[time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Mark Sims
Lady Heather supports a digital clock display. You can zoom it to full screen. It would not be difficult to add the two time zones to that display. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe,

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Thomas S. Knutsen
This week it may be Visual Studio, avaible from: http://www.microsoft.com/visualstudio/eng/products/visual-studio-express-products 73 de Thomas 2012/10/9 Bob Camp > Hi > > I'm not sure I'd call it Basic, but Microsoft has VB Express (or what ever > they call it this week) for free if you are ru

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Randy D. Hunt
On 10/9/2012 11:55 AM, shali...@gmail.com wrote: I am pretty sure good old Visual Basic Pro version 6.0 (and newer) supports to 115kb. GW Basic officially makes you a dinosaur... Didier KO4BB Sent from my Droid Razr 4G LTE wireless tracker. -Original Message- From: cdel...@juno.com

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Magnus Danielson
On 10/09/2012 09:27 PM, John Ackermann N8UR wrote: Here's a link to a USNO paper that measured the tempco of three GPS amplifiers: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA490830 They found that amplifier filtering was the prime cause of tempco, and the narrowest bandpass amplifier they looked

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Bob Camp
Hi I'm not sure I'd call it Basic, but Microsoft has VB Express (or what ever they call it this week) for free if you are running Windows. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Tuesday, October 09, 2012 4

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread paul swed
Looked at powerbasic and yes it supports the higher rates. Various pricing models up to $200 and $50 for a paperback manual. It looks pretty interesting. But at least liberty basic is free up to a level that for most timenuts would be enough. I have no favorites actually. Regards Paul On Tue, Oct

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Magnus Danielson
Dear Edgardo, On 10/09/2012 04:31 AM, Edgardo Molina wrote: Now to the point if you kindly allow. I got involved in a round table discussion around the use of GPS antennas for time and frequency GPS receivers. I tried to make some points from my personal perspective. I got resistance from the a

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Alan Melia
Dinosaurs ruled the world for millions of years, and morphed into creatures that ruled the air until very recently .bit longer than "dotcomms" ...They were very successfull :-)) Alan G3NYK - Original Message - From: To: "Discussion of precise time and frequency measurement" Sent

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread John Ackermann N8UR
Here's a link to a USNO paper that measured the tempco of three GPS amplifiers: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA490830 They found that amplifier filtering was the prime cause of tempco, and the narrowest bandpass amplifier they looked at had a group delay range of 4 nanoseconds over

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Chris Albertson
I don't know abut Windows but onother OSes I can "pipe" the serial port trough some other program, even one as simple as "cat" and then you BASIC program can read the data from cat's output and not have to even know about serial ports. I'm pretty sure this works in Wndows. BASIC will think it is r

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread shalimr9
I am pretty sure good old Visual Basic Pro version 6.0 (and newer) supports to 115kb. GW Basic officially makes you a dinosaur... Didier KO4BB Sent from my Droid Razr 4G LTE wireless tracker. -Original Message- From: cdel...@juno.com To: time-nuts@febo.com Sent: Tue, 09 Oct 2012 12:4

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Chris Albertson
On Tue, Oct 9, 2012 at 10:33 AM, Hal Murray wrote: > > Suppose I wanted to do an experiment with GPS receivers: Is setup A better > than setup B? But they share some parts, say the antenna, so I can't run > them both at the same time. > > How long do I have to collect data for each setup to tell

Re: [time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Jim Lux
On 10/9/12 10:09 AM, Chris Albertson wrote: For wall displays, I've noticed more and more people simply mounting a large HD TVs to the wall and driving it with a computer. Even the menu board in back of Starbucks and the directory near the elevator that lists who is in what room on that floor.

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Bob Camp
Hi In the context of the original post, probably the right question is: do you have a hydrogen maser and an ensemble of cesiums to compare it to? That's the environment that gets front and center at these conferences. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-n

Re: [time-nuts] Atomic Clocks are 3 seconds fast

2012-10-09 Thread Azelio Boriani
WWV and WWVB are co-located so at first I will doubt of the clocks. Try to listen to the WWVB too and compare the two very signals. On Tue, Oct 9, 2012 at 8:22 PM, paul swed wrote: > No idea but no phase modulation is turned on > Paul > > On Tue, Oct 9, 2012 at 1:29 PM, JULIAN TOPOLSKI wrote: >

Re: [time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Jim Lux
On 10/9/12 9:20 AM, Robert Darlington wrote: I like the Symmetricom ND-4, however I don't know if you can have it alternate between TZs. You can buy more than one and label them like I did. That's fine.. multiple displays are no problem.. http://www.symmetricom.com/products/gps-solutions/ti

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread paul swed
Boy all I can say is I measured the $7 satellite splitter and it matched the specs for fwd and rtn loss. Port to port loss using an HP network analyzer. So what can I say it worked and well. Actually surprisingly so. Regards Paul. On Tue, Oct 9, 2012 at 2:38 PM, Dennis Ferguson wrote: > > On 9 O

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Dennis Ferguson
On 9 Oct, 2012, at 12:48 , "Bob Camp" wrote: > If you are after sub ns level timing, things are a bit different than if you > are happy with tens of ns error. Few of us have an adequate survey of our > location to *really* worry about sub ns numbers. If you are one of those > lucky few that can w

Re: [time-nuts] Atomic Clocks are 3 seconds fast

2012-10-09 Thread paul swed
No idea but no phase modulation is turned on Paul On Tue, Oct 9, 2012 at 1:29 PM, JULIAN TOPOLSKI wrote: > > > > > I have two La Crosse wall-mounted atomic clocks, one is set for local > time (Mountain) and the other to UTC. They both are synchronized to WWVB > and display the same time to the

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Don Latham
Have a look at Robot Basic http://www.robotbasic.org/ he price is right, it's easy to use, and transportable. Don cdel...@juno.com > Hi, > > I'm currently using a GWBasic program at 9600 Baud to get 1 second T.I. > data (12 digits) from an SR620 counter, display the reading , put the > reading int

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread Alan Melia
Hi Corby I havent checked Liberty Basic but I believe it does support 57.6kBd.. I have definitely used this speed on PowerBasic for Windows which is a "latter day" upgrade of Borland stable, I believe, but very is very different to GWBasic or QBasic (which is also limited to 9600Bd) and is much

Re: [time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread paul swed
Great question I think the newer basics have no problem with that rate and also many more com ports. I seem to recall liberty basic free and for $59 you get a distro license or more lines of code or something. The basics out their seem pretty capable these days. You still have Windows VB also. Whic

[time-nuts] 57600 baud rate with Basic???

2012-10-09 Thread cdelect
Hi, I'm currently using a GWBasic program at 9600 Baud to get 1 second T.I. data (12 digits) from an SR620 counter, display the reading , put the reading into a file, name the file sequentialy, and either save or delete the file via a function key. I'm switching to a new counter that outputs at 5

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Hal Murray
Suppose I wanted to do an experiment with GPS receivers: Is setup A better than setup B? But they share some parts, say the antenna, so I can't run them both at the same time. How long do I have to collect data for each setup to tell which is better? Is that even the right question? I'm thi

[time-nuts] Atomic Clocks are 3 seconds fast

2012-10-09 Thread JULIAN TOPOLSKI
I have two La Crosse wall-mounted atomic clocks, one is set for local time (Mountain) and the other to UTC. They both are synchronized to WWVB and display the same time to the second (by eyeball). However when I tuned in WWV on 5 MHz (it's only about a 100 miles away so the higher frequenci

Re: [time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Chris Albertson
For wall displays, I've noticed more and more people simply mounting a large HD TVs to the wall and driving it with a computer. Even the menu board in back of Starbucks and the directory near the elevator that lists who is in what room on that floor. I've seen the 9:16 TVs mounted vertically too.

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Tom Knox
I believe it is possible for splitters to be invisible to your system. My first choice would be multiple Antennas. But if you have multiple GPS receivers and require outputs to your test bench, splitters are the logical choice. That said the splitter adds complexity to the system and exponentia

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread paul swed
Yes indeed its a depends since in the original thread there was not a specific requirement. But as you say its a design. If you do not want to design makes more sense to grab a ebay wonder I suspect. For me I had fun designing and saving a buck. 8 ports verses 2... Regards Paul WB8TSL On Tue, Oct

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Bob Camp
Hi If you look at the way NIST sets up one of their "time modem" installations, they do indeed worry a lot about this sort of stuff. There's a major choke / isolator between the antenna and the feed line. The claim is that they see in building grunge causing trouble without it. I'm sure that will

Re: [time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Robert Darlington
I like the Symmetricom ND-4, however I don't know if you can have it alternate between TZs. You can buy more than one and label them like I did. http://www.symmetricom.com/products/gps-solutions/time-code-displays/Network-Time-Displays/ They can get NTP server and timezone through DHCP options,

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread johncroos
Hello All - I do not believe there is a hard Yes or No answer for this question. It depends upon the performance specification of the system elements and the system requirements. For instance if the leakage of noise and discrete signals from each receiver out of the antenna port combined with t

[time-nuts] multi time zone display for wall mounting?

2012-10-09 Thread Jim Lux
I'm looking for an off the shelf commercial time display (or combination of displays).. Needs to display at least 3 zones, in 24 hr form (UTC, Pacific, Eastern), and should display Day of Year, as well. I can feed timecode to it, or even better, if it can ingest NTP. 1 second precision is m

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Timeok
Paul, I am convinced your realization work very well and it is a lower cost in the market. But depend what kind of user have to use the device. For a standard laboratory or a company I am sure is not sufficent your realization, for an hobbist yes, can be. Business or research company want

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread paul swed
Lots of comments. Indeed it sounds like a great discussion for pizza and beer. The more beer the more lively. Did they bring beer? Fact I have used a 8 way splitter Sat/TV for 5 years now. Port to port loss is something like 16 db or 26 db as I recall. It has dc blocking on all but 1 port built in.

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Robert Atkinson
When GPS first started to be fitted to light aircraft it was found that LO leakage from some VHF navigation recivers blocked the GPS when the NAV was on certain channels. You can buy a BNC "T" adaptor where the leg of the T is a 1.5GHz coax stub notch filter. They go on the NAV RX antenna connec

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Timeok
I agree, Luciano timeok Il 2012-10-09 10:41 Azelio Boriani ha scritto: Is there any difference between what a GPS receiver can receve via crosstalk or receive directly from the antenna? In my opinion crosstalk is absolutely less than the last argument about GPS antenna splitters. On Tue, Oct

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Azelio Boriani
Is there any difference between what a GPS receiver can receve via crosstalk or receive directly from the antenna? In my opinion crosstalk is absolutely less than the last argument about GPS antenna splitters. On Tue, Oct 9, 2012 at 9:58 AM, Timeok wrote: > Hi all, > > In my shack I have a singl

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Timeok
Hi all, In my shack I have a single antenna with two power splitter in series because I need several ports for the four GPSDO and spare port for occasional testing. 1.1 They argued that cross talk could happen among ports. I doubt it with the newer models. I have experience with HP

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Adrian
This article discusses timing errors due to mismatch and multiple reflections in transmissin lines: http://www.dtic.mil/dtic/tr/fulltext/u2/a508044.pdf Adrian Edgardo Molina schrieb: Dear Group, Good evening. I just arrived home after the first day of conferences at the Electrical Metrology

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread gary
I was wondering about that myself, but my guess is the crosstalk would be from whatever grunge was coming from the other GPS. Every amplifier has reverse parameters, so a small amount of the crud (circuitry noise) from one GPS will reach the other GPS. Not much, but some people are nuts about t

Re: [time-nuts] To use or not to use transmission line splitters for GPS receivers

2012-10-09 Thread Azelio Boriani
Crosstalk? With the same signal? On Tue, Oct 9, 2012 at 4:31 AM, Edgardo Molina wrote: > Dear Group, > > Good evening. I just arrived home after the first day of conferences at > the Electrical Metrology Forum 2012 at Mexico's metrology center CENAM. I > attended several presentations of time an