Ken and all, What you say is true - but you can detect the transmitted tones sent by WWV with great accuracy. See http://tf.nist.gov/stations/iform.html#stdf for innformation about what tones are transmitted at what times.
With the audio of a SSB receiver fed into the computer soundcard, and the computer running a program like Spectrogram, one can align the received tones with properly set Spectrogram markers and when the transmitted tones line up with the received tones, you can be certain that WWV is tuned precisely. This is actually more accurate than trying to listen for the carrier at zero frequency - neither the receiver audio nor the human ear can respond to zero frequency, and attempt to do so may be off by +/-30 Hz or more - detecting the tones with a graphic display will allow you to tune within a few Hz. 73, Don W3FPR > -----Original Message----- > > A word of caution ... > > The zero beating to WWV should be done during a silent period > so as to avoid zeroing to the tone-modulated carrier. > > If you are receiving a network ... as opposed to a local ... TV > program, the 3579.5454 NTSC color burst signal from your TV > will very accurate. It's locked to the network's frequency standard, > which is in turn locked to the NBS standard in Boulder. > > 73! Ken Kopp - K0PP > [EMAIL PROTECTED] > or > [EMAIL PROTECTED] > > > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.446 / Virus Database: 268.18.5/706 - Release Date: > 2/28/2007 4:09 PM > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.5/706 - Release Date: 2/28/2007 4:09 PM _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
