Re: [time-nuts] WWVB BPSK Receiver Project?

2012-03-19 Thread Poul-Henning Kamp
In message 595370411-1332118092-cardhu_decombobulator_blackberry.rim.net-18097 4826-@b1.c24.bise6.blackberry, shali...@gmail.com writes: I was not concerned about processing power on a PC (or Mac for that matter) but for the uC that was used in PHK's project. That was sort of the entire point

Re: [time-nuts] WWVB BPSK Receiver Project? (fwd)

2012-03-19 Thread Poul-Henning Kamp
In message 4f669a4d.3010...@lazygranch.com, gary writes: DC in a transformer raises the low frequency corner a bit. Obviously not a problem in your case. I just double-checked, because that rang a bell. I did reinstate the capacitors as 2.2uF films in the final article for exactly that reason.

Re: [time-nuts] WWVB phase plots

2012-03-19 Thread Dennis Ferguson
On 18 Mar, 2012, at 10:52 , John Seamons wrote: They do talk about using the 11-bit Barker code for autocorrelation. But the sync bits transmitted only match the Barker code if you interpret them a little bit out-of-order. The part of the paper that talked about the Barker code confused me

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread paul swed
Hello to the group Joe here are the exact model numbers that I have and do indeed work. IOmega488a IOtech Micro 488a IOtech 488ex IOtech serial 488a Black Box 232 to 488a If I would run across other units at $5 as I have in the past I would indeed try the mod. I think the key to the discussion is

[time-nuts] Galaxy NOTE GPS-Glonass

2012-03-19 Thread Geraldo Lino de Campos
The Samsung phone/tablet Galaxy NOTE has a combined GPS Glonass receiver, of very good sensitivity. For instance, in an indoor location near windows, it sees 7 GPS satellites, while a Chinese car GPS sees only 3. In addition, it sees 4 Glonass satellites. AFAIK it is the first affordable combined

[time-nuts] Glonass satellites numbering

2012-03-19 Thread Geraldo Lino de Campos
The NOTEs GPS-Glonass receiver shows the satelliteĀ“s number. In a certain instance, numbers 71, 76, 86 and 87. However, NASA shows in http://ilrs.gsfc.nasa.gov/satellite_missions/list_of_satellites/g125_general.html that satellites 71 and 76 (in western numbering) were withdrawn in 1995! Is

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread lists
What feature does the ROM upgrade achieve? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] Glonass satellites numbering

2012-03-19 Thread Rob Kimberley
Maybe they have filled those slots again with new satellites. Maybe the table is just plain wrong. Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Geraldo Lino de Campos Sent: 19 March 2012 18:53 To: time-nuts@febo.com Subject:

Re: [time-nuts] Glonass satellites numbering

2012-03-19 Thread Brooke Clarke
Hi: A way to find out is ask at: http://mailman.satobs.org/mailman/listinfo/seesat-l or check at http://www.heavens-above.com/ Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/Brooke4Congress.html Rob Kimberley wrote: Maybe they have filled those slots again

Re: [time-nuts] Glonass satellites numbering

2012-03-19 Thread Tom Van Baak
Hi Geraldo, I have a GLONASS receiver running here in Seattle. Over the days I see 24 different SV. Based on $GLGSA messages the SV numbers appear to range from 65 to 88, inclusive. Here is a plot showing how often the receiver uses each one of the SV in the timing solution:

Re: [time-nuts] WWVB BPSK Receiver Project? (fwd)

2012-03-19 Thread ehydra
gary schrieb: Just meditating out loud, if you were to go push pull with a ferrite antenna AND you are winding it yourself, you could avoid the biasing resistors by putting a center tap in the antenna itself, then tie that center tap to an appropriate bias voltage. I haven't seen this done,

Re: [time-nuts] WWVB phase plots

2012-03-19 Thread ehydra
What makes me wonder: Why don't they adapt the DCF77 implementation? Is it the not invented here syndrome? At it looks like they never heard of Kasami sequences. - Henry Dennis Ferguson schrieb: On 18 Mar, 2012, at 10:52 , John Seamons wrote: They do talk about using the 11-bit Barker

Re: [time-nuts] WWVB phase plots

2012-03-19 Thread Brooke Clarke
Hi Henry: There are millions of WWVB clocks in use and the new signal must be fully compatible with them. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/Brooke4Congress.html ehydra wrote: What makes me wonder: Why don't they adapt the DCF77 implementation?

Re: [time-nuts] DIY GPS/GLONASS project

2012-03-19 Thread ehydra
Yes, his whole site is interesting stuff. But the GPS was already mentioned here :-) Even the Andrews variant. - Henry Tom Van Baak schrieb: While researching Geraldo's GLONASS question I ran across an amazing set of pages. It's the best documented homemade GPS+GLONASS receiver project I've

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread Joseph Gray
Paul, Thanks for that info. I'll keep an eye out for those models (cheap). I guess my NI unit is too different to use that EPROM. Joe Gray W5JG On Mon, Mar 19, 2012 at 12:42 PM, paul swed paulsw...@gmail.com wrote: Hello to the group Joe here are the exact model numbers that I have and do

Re: [time-nuts] WWVB phase plots

2012-03-19 Thread ehydra
Hm. I had a quick look at http://en.wikipedia.org/wiki/WWVB I cannot see why it won't work with the DCF77 scheme. The carrier is always on-air. Do I miss something? To low bandwidth of the transmitting antenna? Sorry, I didn't followed the thread in whole. - Henry Brooke Clarke schrieb: Hi

[time-nuts] Who's on first?

2012-03-19 Thread Rich and Marcia Putz
I'm receiving a fairly strong Loran signal here in northern Indiana, and on my IC-725 at that! I'll fire up the Austrons or the FS-700, can anyone steer me toward what GRI I'm may be hearing? Thanks; Rich W9ENG ___ time-nuts mailing list --

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread paul swed
A couple of answers. The difference between the pass through and full controllers is significant in the ease of use for my 2 cents. Well worth the effort. Joe I have never seen a NI controller as you describe. What I have seen is that NI seems to garner rabid interest even at flea markets. I

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread J. L. Trantham
Paul and Joe, I took an interest in this the last time I saw it on the list. I was able to use an NI GPIB-232CV-A with my computer's hyper terminal to communicate with a couple of meters. It has prompted me to undertake an effort to learn to program in VB 2010. I figure in about a year or two,

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread Joseph Gray
Joe I have never seen a NI controller as you describe. What I have seen is that NI seems to garner rabid interest even at flea markets. Paul, The NI GPIB-232CV-A is a simple serial-GPIB converter. The CT-A version is a full controller. I have used my CV-A with a terminal program just fine. As

[time-nuts] re; Who's on first

2012-03-19 Thread Rich and Marcia Putz
Hi all; The FS-700 locked after about 20 minutes, it's still doing third cycle search.(oops, fully locked now after another 10 minutes) Station received is 8970 X-ray, Seneca N.Y. Receiver is reporting, Rcvr Gain 72db, noise Margin 22db. I have 10 Mhz from Thunderbolt fed into the freq in and

Re: [time-nuts] (no subject)

2012-03-19 Thread Bill Riches
100 Khz is s/9 in Cape May, NJ. 73, Bill, WA2DVU Cape May,NJ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] (no subject)

2012-03-19 Thread Bill Riches
OOOPS - had wrong antenna connected - sig is 20/9 and is coming from the only station that has been doing tests. It is located at the southern end of Wildwood New Jersey, the old USCG engineering station. About 5 miles as the crow flies from my qth. 73, Bill -Original Message- From:

Re: [time-nuts] re; Who's on first

2012-03-19 Thread paul swed
Yes indeed though further away I get signal of 38, fast lock in 10 minutes and currently measuring local RB at 3.1 e 11 and on second unit 3.5 e 11. If the signal stays on it will continue downward but takes numbers of hours to do that. See in the morning Paul WB8TSL Boston On Mon, Mar 19, 2012

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread paul swed
Not bad at all. But the passive interfaces are the ones that go for $5. On Mon, Mar 19, 2012 at 8:24 PM, Joseph Gray jg...@zianet.com wrote: Joe I have never seen a NI controller as you describe. What I have seen is that NI seems to garner rabid interest even at flea markets. Paul, The

Re: [time-nuts] WWVB phase plots

2012-03-19 Thread Dennis Ferguson
DCF77's AM modulation is a much better fit for what they did, and a much better design in general. All the useful phase modulation needs to be carried by the carrier at full power. DCF77's AM modulation drops the carrier power for only 100 ms or 200 ms at the beginning of the second, which gives

Re: [time-nuts] WWVB phase plots

2012-03-19 Thread Hal Murray
It is also the case the DCF77's phase modulation probably isn't as good as it could be if the goal is to find it in the noise since it only swings +/- 15 degrees rather than +/- 90. Its big advantage might be that it is high speed, with lots of transitions, so you can probably measure phase

Re: [time-nuts] IOTECH 488 EPROM

2012-03-19 Thread Hal Murray
jlt...@att.net said: I have a friend who is helping me with the effort. He has written some programs to work with a 3458A and the ProLogix USB/GPIB adapter. I plan to dissect the programs and modify them to suit my needs. Hopefully, it will be a learning experience. We should collect