Re: [time-nuts] WWV/CHU

On 30 March 2018 at 06:49, Tom Van Baak wrote: > > FYI: for the original spam-free version, please use: > > https://tf.nist.gov/general/pdf/469.pdf > > In general, if the author or paper is related to NIST, the original > copyright-free PDF will be available in the NIST Time

Re: [time-nuts] WWV/CHU

Hi > On Mar 30, 2018, at 12:42 AM, Hal Murray wrote: > > > jim...@earthlink.net said: >> Hal, you should know better than to have a question like "get time" on this >> list without specify the precision and accuracy . > > I was thinking of measuring the results,

Re: [time-nuts] WWV/CHU

t...@leapsecond.com said: > In general, if the author or paper is related to NIST, the original > copyright-free PDF will be available in the NIST Time and Frequency > Publication Database. That easily searchable database, and the thousands of > papers it contains, is probably the greatest asset

Re: [time-nuts] WWV/CHU

> This is an IEEE article from 1972 that looks like a good fit: > Nationwide Precise Time and Frequency > Distribution Utilizing an Active Code Within > Network Television Broadcasts >DAVID A. HOWE > https://www.researchgate.net/publication/3092613 FYI: for the

Re: [time-nuts] WWV/CHU

jim...@earthlink.net said: > Hal, you should know better than to have a question like "get time" on this > list without specify the precision and accuracy . I was thinking of measuring the results, and maybe comparing various receivers if I get that far. "Good enough" for me would be to

Re: [time-nuts] WWV/CHU

I'll add to the conversation. CHU is easier to deal with because its not a subcarrier as the 100 Hz WWV signal is. Its FSK and bell 103 modem style. Regards Paul WB8TSL On Thu, Mar 29, 2018 at 10:08 AM, jimlux wrote: > On 3/29/18 3:49 AM, Attila Kinali wrote: > >> On Thu,

Re: [time-nuts] WWV/CHU

Hi There are a *lot* of HF receiver gizmos out there these days. Is $5 to much to spend? Does the budget make it up to $300? Do you want to pick up *every* time transmission at once? (as constrained by propagation). For something like 5 MHz / 10 MHz WWVB plus CHU, there are $20 demo boards

Re: [time-nuts] WWV/CHU

On 3/29/18 3:49 AM, Attila Kinali wrote: On Thu, 29 Mar 2018 03:12:24 -0700 Hal Murray wrote: What do I need in in order to get time from WWV or CHU? Do I need a fancy receiver as a front end? Do I have a chance with one of the low cost USB thumb drive size

Re: [time-nuts] WWV/CHU

On 3/29/18 3:12 AM, Hal Murray wrote: What do I need in in order to get time from WWV or CHU? Do I need a fancy receiver as a front end? Do I have a chance with one of the low cost USB thumb drive size receivers? Is there an obvious software package to start with? (Linux) Hal, you should

Re: [time-nuts] WWV/CHU

Hi If you are running 10 MHz as your lab standard, you *will* have 10 MHz floating around. Add to that various 10 MHz OCXO’s here or there on the bench and you have even more odd stuff right at 10 MHz. Yes, if you run triple shield coax for your standard lines and your antenna is 1000’ from

Re: [time-nuts] WWV/CHU

It does not take a fancy receiver to hear WWV or CHU. Any super low end shortwave portable (less than $100) will do fine. You then feed the audio into a PC with naps configured for NTP audio refclock. The wideband USB connected DSP receivers are neat and I am using one for various purposes in

Re: [time-nuts] WWV/CHU

On Thu, 29 Mar 2018 03:12:24 -0700 Hal Murray wrote: > What do I need in in order to get time from WWV or CHU? > > Do I need a fancy receiver as a front end? Do I have a chance with one of > the low cost USB thumb drive size receivers? > > Is there an obvious

[time-nuts] WWV/CHU

What do I need in in order to get time from WWV or CHU? Do I need a fancy receiver as a front end? Do I have a chance with one of the low cost USB thumb drive size receivers? Is there an obvious software package to start with? (Linux) -- These are my opinions. I hate spam.

Re: [time-nuts] WWV or Net Clock controlled oscillator

hol...@hotmail.com said: > The university that I hang out at has a clock tower with a full set of > bells. ... Stanford has a clock tower. Searching YouTube for >Stanford Clock Tower< will find several short videos. It's in a roughly 10 ft square room with big windows on all 4 sides. I stop

Re: [time-nuts] WWV or Net Clock controlled oscillator

Or if you want a bit more of a challenge, you might consider the DS3231 https://datasheets.maximintegrated.com/en/ds/DS3231.pdf This is a full-featured real time clock with a TCXO. It has a programmable 32KHz or 1 pps output. You can trim the frequency digitally via an I2C port in increments of

Re: [time-nuts] WWV or Net Clock controlled oscillator

essage- From: D. Resor <organli...@pacbell.net> To: 'Tom Van Baak' <t...@leapsecond.com>; 'Discussion of precise time and frequency measurement' <time-nuts@febo.com> Sent: Mon, Mar 5, 2018 10:02 am Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator The unit has an

[time-nuts] WWV or Net Clock controlled oscillator

I've been known to use the egg timer mode in the kitchen... I get distracted easily and burned food has been known to occur. Due to system vagaries, it is probably only accurate to say 30 milliseconds (better on Linux, of course), so less than perfect eggs are possible. I've thought about

Re: [time-nuts] WWV or Net Clock controlled oscillator

To the yoctosecond. Very fine sand in the li'l hourglass. On Monday, March 5, 2018, jimlux wrote: > On 3/5/18 10:26 AM, Mark Sims wrote: > > Besides those clocks Heather has alarm clock and egg timer alarms. >> > > > because doesn't everyone time their soft boiled eggs

Re: [time-nuts] WWV or Net Clock controlled oscillator

On 3/5/18 10:26 AM, Mark Sims wrote: Besides those clocks Heather has alarm clock and egg timer alarms. because doesn't everyone time their soft boiled eggs to the microsecond? (hmm, my Z3801 GPSDO is probably good to 1E-11 at tau of 300 seconds, so that's a potential error of 3ns )

[time-nuts] WWV or Net Clock controlled oscillator

The university that I hang out at has a clock tower with a full set of bells. Several years ago the tower and bells were restored, at hefty expense. But, alas, some no-goodnik neighbors objected to the sound, so they cut back the use of the clock. I don't know what system they use to get

Re: [time-nuts] WWV or Net Clock controlled oscillator

time-nuts@febo.com> Sent: Mon, Mar 5, 2018 10:02 am Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator I have been soldering since I was in high-school (circa 1970s) and before that. I have two additional Maas-Rowe Controllers here at home I can work with. However I do not want

Re: [time-nuts] WWV or Net Clock controlled oscillator

;time-nuts-boun...@febo.com> On Behalf Of Tom Van Baak > Sent: Sunday, March 04, 2018 3:02 PM > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator > > Donald, > > Possible solutio

Re: [time-nuts] WWV or Net Clock controlled oscillator

ime-nuts <time-nuts-boun...@febo.com> On Behalf Of Tom Van Baak Sent: Sunday, March 04, 2018 3:02 PM To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator Donald, Possible solutions to your 60 Hz

Re: [time-nuts] WWV or Net Clock controlled oscillator

iginal Message- From: time-nuts <time-nuts-boun...@febo.com> On Behalf Of paul swed Sent: Sunday, March 04, 2018 2:21 PM To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator Donald I don't know if

Re: [time-nuts] WWV or Net Clock controlled oscillator

;time-nuts-boun...@febo.com> On Behalf Of Thomas Miller Sent: Sunday, March 04, 2018 2:50 PM To: time-nuts@febo.com Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator Can you supply any schematics, good images of the electronics? We may be able to suss out how they do the internal referen

Re: [time-nuts] WWV or Net Clock controlled oscillator

boun...@febo.com> On Behalf Of Adrian Godwin Sent: Sunday, March 04, 2018 3:25 PM To: Tom Van Baak <t...@leapsecond.com>; Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] WWV or Net Clock controlled oscillator Donald, I'm interested to

Re: [time-nuts] WWV or Net Clock controlled oscillator

eapsecond.com/pic/src/pd60.asm > > /tvb > > - Original Message - > From: "Adrian Godwin" <artgod...@gmail.com> > To: "Discussion of precise time and frequency measurement" < > time-nuts@febo.com> > Sent: Sunday, March 04, 2018 2:57 PM >

Re: [time-nuts] WWV or Net Clock controlled oscillator

/pic/src/pd60.asm /tvb - Original Message - From: "Adrian Godwin" <artgod...@gmail.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Sunday, March 04, 2018 2:57 PM Subject: Re: [time-nuts] WWV or Net Clock controlle

Re: [time-nuts] WWV or Net Clock controlled oscillator

nowing what the current local date / time is. /tvb - Original Message - From: "D. Resor" <organli...@pacbell.net> To: "Time Nuts List" <time-nuts@febo.com> Sent: Sunday, March 04, 2018 2:30 AM Subject: [time-nuts] WWV or Net Clock controlled oscillator

Re: [time-nuts] WWV or Net Clock controlled oscillator

There is indeed a 60Hz out picdiv from Tom Van Baak - http://www.leapsecond.com/pic/picdiv.htm. It's not in that list but ask Tom. I've just used one (modified for 50Hz out) to drive a 1A H-bridge circuit that supplies a 12V peak-peak square wave to an old LED clock, replacing the original

Re: [time-nuts] WWV or Net Clock controlled oscillator

s List <time-nuts@febo.com> Sent: Sun, Mar 4, 2018 2:45 pm Subject: [time-nuts] WWV or Net Clock controlled oscillator Hello, My first post here. I found this group's user group page while researching a source for either a WWV, GPS or Network referenced oscillator. The devices/equip

Re: [time-nuts] WWV or Net Clock controlled oscillator

Donald I don't know if anyone makes such a thing. But I can easily think of numbers of answers. It depends on what the Mass Rowe will allow and how comfortable you are with a soldering iron. I will guess you need to dig in and supply a better reference. I searched the web for mass rowe and it

[time-nuts] WWV or Net Clock controlled oscillator

Hello, My first post here. I found this group's user group page while researching a source for either a WWV, GPS or Network referenced oscillator. The devices/equipment which I was able to find didn't seem to fit the requirements. What I have is a Maas-Rowe DCB1 (Digital Chronobell

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

Hi Not in the least bit uncommon propagation at those frequencies and this time of year. Bob > On Jul 16, 2017, at 8:44 PM, Clay Autery wrote: > > Prop shifted... I tuned to it before I left for Home Depot at 1600 hrs > CST, and it was strong It was GONE by 1830 hrs.

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

Solar wind conditions is such that right now things is flakey. Cheers, Magnus (at 1400 m in Lichtenstein on a mini DX expedition - we had to give up for the night) On 07/17/2017 02:44 AM, Clay Autery wrote: Prop shifted... I tuned to it before I left for Home Depot at 1600 hrs CST, and it

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

Prop shifted... I tuned to it before I left for Home Depot at 1600 hrs CST, and it was strong It was GONE by 1830 hrs. __ Clay Autery, KY5G MONTAC Enterprises (318) 518-1389 On 7/16/2017 6:32 PM, paul swed wrote: > Not hearing wwv on 25 MHz but 15 is fine. Using a beam

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

FYI...   I was hearing WWV/25 several weeks ago peaking S8 here in Central Texas...  WWV/20 was inaudible!  ;-)   Path 155 degrees 795 miles...    Below from the NIST.gov Web Page:    As of 2042 UTC 7 July 2017 the 25 MHz broadcast is now on a turnstile antenna with circular polarization and will

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

On Jul 16, 2017 4:49 PM, "Brian, WA1ZMS" wrote: FWIW.We're at an 11 yr low for solar activity. Thus no big suprise that 25MHz is not covering the US very well, but a rare opening is always possible. +1 de ai6kg ___ time-nuts

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

FWIW.We're at an 11 yr low for solar activity. Thus no big suprise that 25MHz is not covering the US very well, but a rare opening is always possible. -Brian > On Jul 16, 2017, at 7:32 PM, paul swed wrote: > > Not hearing wwv on 25 MHz but 15 is fine. Using a beam and

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

Not hearing wwv on 25 MHz but 15 is fine. Using a beam and r1051 receiver. Maybe its not on for the weekend. Its a 2 KW signal so should be able to hear something. Regards Paul WB8TSL On Fri, Jul 14, 2017 at 9:29 PM, paul swed wrote: > Sorry its a bit lower in the site that

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

I went to the wwv site and do not see 25 MHz mentioned. I do see 20 MHz. On Fri, Jul 14, 2017 at 1:17 PM, paul swed wrote: > Gregory, > I have to be honest and say I didn't even think wwv was on 25 MHz anymore. > Son of a gun. I will have to listen. > Paul > WB8TSL > > On

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

Sorry its a bit lower in the site that they resumed broadcasting. I thought it had been off for many years. Amazing that they kept the transmitter in shape for operation. Regards Paul WB8TSL On Fri, Jul 14, 2017 at 9:27 PM, paul swed wrote: > I went to the wwv site and do

Re: [time-nuts] WWV 25 MHz antenna switched to circular polarization

Gregory, I have to be honest and say I didn't even think wwv was on 25 MHz anymore. Son of a gun. I will have to listen. Paul WB8TSL On Fri, Jul 14, 2017 at 1:14 PM, Gregory Beat wrote: > As reported by ARRL, a few days ago, on July 7th the 25 MHz antenna for > WWV was changed

[time-nuts] WWV 25 MHz antenna switched to circular polarization

As reported by ARRL, a few days ago, on July 7th the 25 MHz antenna for WWV was changed to circular polarization. http://www.arrl.org/news/wwv-25-mhz-signal-swapped-to-circular-polarization Matt Deutch, N0RGT the Lead electrical engineer at WWV said it’s hoped that the latest antenna change to

[time-nuts] WWV off-air for 2 days...

https://www.nist.gov/pml/time-and-frequency-division/time-services/wwv-broadcast-outages -Brian, WA1ZMS iPhone ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow

Re: [time-nuts] WWV Receivers

On Mon, Feb 6, 2017 at 11:27 PM, Hal Murray wrote: > > > esp. if one uses a Chinese $6.50 incl. shipping HF receiver off eBay; > > Could somebody give me a lesson in receivers appropriate for extracting > time > from WWV? > > Is $10 a realistic price? > Yes, this would

Re: [time-nuts] WWV Receivers

In message <20170207072741.b084f406...@ip-64-139-1-69.sjc.megapath.net>, Hal Murray writes: > >> esp. if one uses a Chinese $6.50 incl. shipping HF receiver off eBay; > >Could somebody give me a lesson in receivers appropriate for extracting time >from WWV? Somebody should do an SDR

[time-nuts] WWV Receivers

> esp. if one uses a Chinese $6.50 incl. shipping HF receiver off eBay; Could somebody give me a lesson in receivers appropriate for extracting time from WWV? Is $10 a realistic price? -- These are my opinions. I hate spam. ___ time-nuts

Re: [time-nuts] WWV receivers?

There is zero jitter through the SDR software because you can always buffer the output and then reclock it on output and all you have to deal with is a known fixed delay. If the samples are clocked in accurately that is all you need. Some audio interfaces have can have very good timing and run

Re: [time-nuts] WWV receivers?

No, no, no. The single chip in this case is an AFSK decoder. You still have to have an ordinary HF AM radio. > On Oct 29, 2016, at 11:21 AM, Chris Albertson > wrote: > > Are you sure the single chip receiver is not itself an SDR? Maybe using a > little 8-bit uP

Re: [time-nuts] WWV receivers?

On Sat, 29 Oct 2016 09:35:25 -0700 jimlux wrote: > > Should not be too high. If Jeff Sherman's and Robert Jörden's paper[1] > > is any indication, then the jitter should be dominated by the jitter > > of the ADC and its reference oscillator. So sub-ps, order of 100fs jitter

Re: [time-nuts] WWV receivers?

Are you sure the single chip receiver is not itself an SDR? Maybe using a little 8-bit uP inside? I don't know. In any case the jitter on the SDR depends on the sample rate clock. If you use a decent audio interface the clocks are not bad. A little 4-pin crystal oscillator controls the

Re: [time-nuts] WWV receivers?

On 10/29/16 4:49 AM, Attila Kinali wrote: On Fri, 28 Oct 2016 23:01:52 -0700 Hal Murray wrote: nsa...@kfu.com said: That single-chip version is going to have a *LOT* less (and less variable) latency than an SDR. Latency isn't an issue as long as it is known so that

Re: [time-nuts] WWV receivers?

Good thread. Thanks for the clue on the kiwiSDR. I went to the sites and lots of fun playing with the receivers. As an example hearing LORAN C in the Asia region. Certainly seems the receiver is pretty sensitive and capable. Went hunting for various low frequency timing signals such as JJY and the

Re: [time-nuts] WWV receivers?

Hi Let’s see…. WWV (not WWVB) gets here via a variety of propagation mechanisms that vary over the day. According to NIST (who probably know :) that puts a random timing variation of ~1 ms on the signal. Since some modes get me a signal and others don’t, there is no real reason to assume it is

Re: [time-nuts] WWV receivers?

In message <20161029134952.e60a2182e1f53844ec50b...@kinali.ch>, Attila Kinali writes: >> nsa...@kfu.com said: >> > That single-chip version is going to have a *LOT* less (and less variable) >> > latency than an SDR. >> >> Latency isn't an issue as long as it is known so that you can

Re: [time-nuts] WWV receivers?

On Fri, 28 Oct 2016 23:01:52 -0700 Hal Murray wrote: > nsa...@kfu.com said: > > That single-chip version is going to have a *LOT* less (and less variable) > > latency than an SDR. > > Latency isn't an issue as long as it is known so that you can correct for it. > >

Re: [time-nuts] WWV receivers?

nsa...@kfu.com said: > That single-chip version is going to have a *LOT* less (and less variable) > latency than an SDR. Latency isn't an issue as long as it is known so that you can correct for it. Has anybody measured the jitter through SDR and/or tried to reduce it? I'd expect that even

Re: [time-nuts] WWV receivers?

That single-chip version is going to have a *LOT* less (and less variable) latency than an SDR. > On Oct 27, 2016, at 12:20 AM, Poul-Henning Kamp wrote: > > > In message <5a002554-8d90-4c75-95da-21db45d61...@kfu.com>, Nick Sayer via > time- > nuts writes: > >>

Re: [time-nuts] WWV receivers?

In message <5a002554-8d90-4c75-95da-21db45d61...@kfu.com>, Nick Sayer via time- nuts writes: >If you’re in North America, a CHU receiver is a lot easier to make >than WWV/WWVH. The CHU timecode is just BEL 103 AFSK at 300 baud - >it was a one-chip solution 20 years ago when I made one in

Re: [time-nuts] WWV receivers?

I started to set up a WWV based reference clock. As for a receiver SDR is the best way to go but I built a tunnel front end. It is easy to do because it needs to only work at ne specify frequency so you can use a crystal filter with norrow bandwidth. The SDR receiver did direct conversion that

Re: [time-nuts] WWV receivers?

If you’re in North America, a CHU receiver is a lot easier to make than WWV/WWVH. The CHU timecode is just BEL 103 AFSK at 300 baud - it was a one-chip solution 20 years ago when I made one in college. On the software side, you’ll want a serial line discipline kernel module of some sort that

Re: [time-nuts] WWV receivers?

On 10/26/2016 02:54 AM, Hal Murray wrote: tsho...@gmail.com said: I'm all for a diversity of systems - putting all our eggs in the GPS basket seems unwise (and I maintain WWV receivers hooked to NTP at home!) What is available in the way of WWV receivers? Anybody got a summary handy? Yes,

[time-nuts] WWV receivers?

tsho...@gmail.com said: > I'm all for a diversity of systems - putting all our eggs in the GPS basket > seems unwise (and I maintain WWV receivers hooked to NTP at home!) What is available in the way of WWV receivers? Anybody got a summary handy? -- These are my opinions. I hate spam.

[time-nuts] WWV 12 Hz doppler shift

Seehttp://www.spaceweather.com/ Antonio I8IOV ___ 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] WWV 12 Hz doppler shift

On Mon, 31 Mar 2014 13:54:04 +0200 (CEST) iov...@inwind.it iov...@inwind.it wrote: Seehttp://www.spaceweather.com/ Antonio I8IOV ___ I had considered modifying one of my fully synthesized radios to use a GPSDO. Now I regret not getting around to

Re: [time-nuts] WWV 12 Hz doppler shift

On Mon, Mar 31, 2014 at 4:32 PM, nuts n...@lazygranch.com wrote: On Mon, 31 Mar 2014 13:54:04 +0200 (CEST) iov...@inwind.it iov...@inwind.it wrote: Seehttp://www.spaceweather.com/ Antonio I8IOV ___ I had considered modifying one of my fully

Re: [time-nuts] WWV/WWVH audio simulator?

On 1/6/14 9:44 PM, Magnus Danielson wrote: Jim, On 07/01/14 05:43, Jim Lux wrote: On 1/6/14 8:36 PM, Magnus Danielson wrote: Bob, It works the other way around. The standard Bell handset (103A I believe the designation was) has the 300-3400 Hz response, and with not so fancy analogue

[time-nuts] WWV/WWVH audio simulator?

That's usually caused by the expulsion of vast quantities of hot air ;-) I once hooked an audio spectrum analyzer to an FM radio. You could almost always see 15734 Hz and/or 15625 Hz tones in all the songs that they played. There were quite a few songs that obviously had parts recorded in

Re: [time-nuts] WWV/WWVH audio simulator?

To subscribe to the fun with wood group send a blank email to funwithwood-subscr...@yahoogroups.com - Original Message - From: Mark Sims hol...@hotmail.com To: time-nuts@febo.com Sent: Tuesday, January 07, 2014 6:13 PM Subject: [time-nuts] WWV/WWVH audio simulator? That's usually caused

Re: [time-nuts] WWV/WWVH audio simulator?

-nuts@febo.com Sent: Sunday, January 5, 2014 1:53 PM Subject: Re: [time-nuts] WWV/WWVH audio simulator? This is by design The POTS (Plain Old Telephone System) specifies a bandwidth of 300Hz to 3,400Hz. http://en.wikipedia.org/wiki/Plain_old_telephone_service They are trying to cram as many

Re: [time-nuts] WWV/WWVH audio simulator?

On 1/6/14 8:36 PM, Magnus Danielson wrote: Bob, It works the other way around. The standard Bell handset (103A I believe the designation was) has the 300-3400 Hz response, and with not so fancy analogue filtering, you can handle 4 kHz and thus 8 kHz sampling rate. The ITU-T G.711 A-law (where

Re: [time-nuts] WWV/WWVH audio simulator?

-nuts@febo.com Sent: Sunday, January 5, 2014 1:53 PM Subject: Re: [time-nuts] WWV/WWVH audio simulator? This is by design The POTS (Plain Old Telephone System) specifies a bandwidth of 300Hz to 3,400Hz. http://en.wikipedia.org/wiki/Plain_old_telephone_service They are trying to cram as many

Re: [time-nuts] WWV/WWVH audio simulator?

Jim, On 07/01/14 05:43, Jim Lux wrote: On 1/6/14 8:36 PM, Magnus Danielson wrote: Bob, It works the other way around. The standard Bell handset (103A I believe the designation was) has the 300-3400 Hz response, and with not so fancy analogue filtering, you can handle 4 kHz and thus 8 kHz

Re: [time-nuts] WWV/WWVH audio simulator?

On 07/01/14 05:53, Tom Minnis wrote: I believe the Western Electric D1 channel bank was the first and the European standard came along later. Then came the D2, the D3 and finally the D4 when integrated codecs finally came to be and it was practical to get rid of the common codec and do it

[time-nuts] WWV/WWVH audio simulator

Jayson Smith wrote: Anyway, I'd love to find a program for Windows that simulates the audio from WWV as closely as possible. I know someone on this list talked about having written such a beast, although I don't know if it'd run on Windows, back in 2010. I also wish WWV streamed on the net.

Re: [time-nuts] WWV/WWVH audio simulator?

No, that's not it. It's a design-by-committee thing. As I recall it, the Europeans wanted a 32 byte payload, as then you throw in a 32-byte E1 into it, but this was judged to small for datacom which the North American side wanted, that wanted a 64 byte payload. Thanks. I hadn't heard the

Re: [time-nuts] WWV/WWVH audio simulator?

Hi, Wow, those recordings are very interesting! Late in that series, there's one which sounds like a direct feed of WWVH for a few minutes. This really points out what all is lost by the time the signal gets to air. The phone services aren't much better, since everything above 4KHZ is lost,

Re: [time-nuts] WWV/WWVH audio simulator?

Replicating the WWV/WWVB audio is impractical given the various weather and other timely messages. One could use the Linux festival voice syntheses package, which gives a choice of voices. On 01/05/2014 07:50 AM, Jayson Smith wrote: Hi, Wow, those recordings are very interesting! Late in

Re: [time-nuts] WWV/WWVH audio simulator?

Of Jayson Smith Sent: Sunday, January 05, 2014 07:51 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] WWV/WWVH audio simulator? Hi, Wow, those recordings are very interesting! Late in that series, there's one which sounds like a direct feed of WWVH

Re: [time-nuts] WWV/WWVH audio simulator?

measurement' time-nuts@febo.com Sent: Sunday, January 5, 2014 1:53 PM Subject: Re: [time-nuts] WWV/WWVH audio simulator? This is by design The POTS (Plain Old Telephone System) specifies a bandwidth of 300Hz to 3,400Hz. http://en.wikipedia.org/wiki/Plain_old_telephone_service They are trying

Re: [time-nuts] WWV/WWVH audio simulator?

and frequency measurement Subject: Re: [time-nuts] WWV/WWVH audio simulator? The US POTS is digitized at 8KHz sample rate, so Nyquist says the highest frequency you can accurately digitize is 4KHz. Allow some for a (fancy digital) filter and 3400Hz is about the best you can expect. As for T1

Re: [time-nuts] WWV/WWVH audio simulator?

Hi Jayson, You may already be aware of it, but there's a set of historical recordings of WWV and WWVH, covering 1955 to 2005: http://www.myke.me/atthetone/ As for the simulation, I'm sure it would be easy to do the tones and clicks, but the voice announcements would need a considerable amount

[time-nuts] WWV/WWVH audio simulator?

Hello, Brand new to this list. I'm blind, but have always been fascinated with time, time standards, timezones, etc. As a kid, WWV used to be my favorite radio station, no kidding! My dad would let me listen to it for hours on his ham radio, and eventually I got a shortwave radio of my own.

Re: [time-nuts] WWV/WWVH audio simulator?

Two ideas (1) buy a WWV receiver or (2) I'm sure Windows must come with something like Apple's Garage Band (I don't know about Windows) but use that to compose a sound that plays in an endless loop. Likely you'd use one of the drum machines. Basically I'm saying yu can treat it as music and

Re: [time-nuts] WWV/WWVH audio simulator?

Jayson, I chuckle because WWV is my favorite radio station also. Why not tune it in on a good day and record the audio?  Then you can digitize it on the computer and have a .WAV file which you can play any time. Trouble is, if you have recorded the announcements, you won't have the correct

Re: [time-nuts] WWV/WWVH audio simulator?

On Fri, Jan 3, 2014 at 12:09 PM, Bob Albert bob91...@yahoo.com wrote: Jayson, I chuckle because WWV is my favorite radio station also. Why not tune it in on a good day and record the audio? Then you can digitize it on the computer and have a .WAV file which you can play any time.

[time-nuts] WWV Simulator Programs

A Google search found this web page that has 2 simulator programs: http://www.atkielski.com/main/FreeSoftware.html Enjoy! Julian KR5J ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] WWV Simulator Programs

I'd like to see a WWVB generator that could output the 60 KHz WWVB signal through a sound card for the benefit of hard of hearing atomic clocks by Oregon Scientific and others. On 01/03/2014 10:32 AM, JULIAN TOPOLSKI wrote: A Google search found this web page that has 2 simulator programs:

Re: [time-nuts] WWV/WWVH audio simulator?

I have played WWV or CHU when I want to know the time but not be bothered by extraneous sounds. I live in Michigan, USA. When I built my first homebrew RF spectrum analyzer I found that I had to spend a week stopping CHU and another local AM station from coming in on the power line. A cheap

Re: [time-nuts] WWV Simulator Programs

Basically you just need an amplifier centered on 60 kHz. On Friday, January 3, 2014 10:42 AM, Chuck Forsberg WA7KGX c...@omen.com wrote: I'd like to see a WWVB generator that could output the 60 KHz WWVB signal through a sound card for the benefit of hard of hearing atomic clocks by Oregon

Re: [time-nuts] WWV

Thought you guys might like to read this and maybe send them some more reports: -Original Message- From: Brad Dye [ mailto:b...@braddye.com Sent: Tuesday, August 21, 2012 2:36 PM To: inquiry Subject: WWV Voice Time Announcements Have you posted any official news about WWV

Re: [time-nuts] WWV

Brad, Could you please elaborate on what exactly you heard, and when, so we can keep our ears ready? On Aug 22, 2012, at 11:30, Brad Dye b...@braddye.com wrote: Thought you guys might like to read this and maybe send them some more reports: -Original Message- From: Brad Dye [

Re: [time-nuts] WWV

measurement time-nuts@febo.com Sent: Wednesday, August 22, 2012 12:58 PM Subject: Re: [time-nuts] WWV Brad, Could you please elaborate on what exactly you heard, and when, so we can keep our ears ready? On Aug 22, 2012, at 11:30, Brad Dye b...@braddye.com wrote: Thought you guys might like to read

[time-nuts] WWV

There is a thread on http://tech.groups.yahoo.com/group/FMT-nuts/ with many observations of WWV reporting the wrong time. Here is a clip of just one of them: FYI, I tuned into WWV this evening (August 19, 2012 UTC), and was surprised to hear the station making some incorrect audio time

[time-nuts] WWV

Brad; I believe there are plans to eventually phase in a more reliable phase modulation/demodulation system. In fact testing is being performed this week which may affect more critical receivers (other than inexpensive Atomic Clock stuff). http://www.nist.gov/pml/div688/grp40/wwvb.cfm --

Re: [time-nuts] WWV

This is true and I am actually watching and trying to correct for the wwvb phase modulation. Though more work to be done. Regards Paul WB8TSL On Wed, Aug 22, 2012 at 10:02 PM, Joe Leikhim jleik...@leikhim.com wrote: Brad; I believe there are plans to eventually phase in a more reliable phase

Re: [time-nuts] WWV

- Original Message - From: Tom Miller tmil...@skylinenet.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, August 22, 2012 3:35 PM Subject: Re: [time-nuts] WWV I have one of the atomic clocks that sets itself via WWVB to keep time

Re: [time-nuts] WWV Clock

Majdi S. Abbas m...@latt.net wrote: On Sun, Nov 01, 2009 at 05:51:24PM -0500, Glenn Little WB4UIV wrote: My WWV clock at home and the master clock at the TV station that I am engineer for did not update to EST from EDT. Did anyone else see their WWV clock not change time

Re: [time-nuts] WWV Clock

Replying to my own post, there are two bits that indicate daylight saving time changes. Here's a paragraph from page 27, Lombardi, NIST Time and Frequency Services, NIST Special Publication 432, 2002 Edition: Daylight saving time (DST) and standard time (ST) information is

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