That audio signal was broadcast in the nineties by our state radio and TV provider RAI. The signal was from the IEN now INRIM (http://www.inrim.it) and directed to the RAI facilities. Nowadays it can be heard on the medium wave RAI transmissions or by connecting to this italian site " http://www.dimenticatoio.it/index.php?title=Segnale_Orario_Rai"; where the italian word "dimenticatoio" means "place for the forgotten things". The signal details can be found at the link posted by Graham. Useful terms: preavviso cambio ora solare/estiva daylight savings about to start preavviso secondo intercalare leapsecond notice
On Sun, Apr 28, 2013 at 3:16 PM, Graham <[email protected]> wrote: > > I hear this Italian time station quite often here in Ottawa Canada. At > those times it is almost as strong as WWV. > > http://www.**associazioneitalcable.it/<http://www.associazioneitalcable.it/> > has some info in Italian > > > Some details of the time signal can be found here: > > http://www.inrim.it/res/tf/**immagini/src.jpg<http://www.inrim.it/res/tf/immagini/src.jpg> > > /and, this is a good email address for the operator: > [email protected] > > They also transmits on 15000 Khz as well > > cheers, Graham ve3gtc > / > > On 13-04-28 12:43 PM, Iain Young wrote: > >> >> Hi Folks, >> >> A friend of mine sent me a You Tube recording of an unidentified Time >> Station on 10MHz, possibly from Italy or Brazil. Further work seems to >> suggest it is indeed an experimental time station from Italy. >> >> Below is a (modified for context) version of the email I sent him: >> >> --BEGIN INCLUDE MESSAGE--- >> >> At first look, I tend to agree with others that it's a new >> experimental Italian Time Signal. It is also shown on this >> You Tube link: >> >> >> http://www.youtube.com/watch?**v=VSQyKh694RU<http://www.youtube.com/watch?v=VSQyKh694RU> >> >> Video claims to be: Experimental Time Signal from the italian private >> socitey Italcable transmitting at 10000KHz >> >> Three observations from this recording: >> >> a) The "pips" are about ~1k up from the main carrier on 10MHz. >> Probably a little higher, maybe 1.1k >> >> b) Right at the beginning, there is a burst of digital comms, that >> to my ear sounded similar to 300 baud packet. Checking the Frequency >> vs Amplitude display in the bottom left again, it appears that that >> burst is up at ~2k+ from the 10MHz centre >> >> Now...a PK232 running 300 baud uses the following frequencies: >> >> 2110 Mark, and 2310 space tones as a PK-232, with the center of the >> tones being 2210 Hz, and going fullscreen on the video suggests that >> the spikes during that burst are smack where we would see them for >> 300 baud packet when using a PK-232. >> >> (With the resolution of the youtube video and the screen, thats as >> accurate as I can get) >> >> c) The burst does appear to repeat later in the recording, which >> suggests it may be part of the time code, rather than some >> Italian APRS station being a tad off frequency >> >> >> I would suggest that the next step would be to put a 300 baud >> PK232 MODEM on 10 MHz, and record anything that gets decoded. >> >> If its ASCII (highly unlikely to be KISS Frames unless it is someone >> way off frequency, and c) above would seem to suggest that's less >> likely, then it may well be the time of day. >> >> In that case, in order to use it, we need to work out the reference >> point. There seems to be six pips 1 second apart, a gap of a two >> seconds, followed by a final seventh pip. >> >> While different to Radio 4's longer final pip, this is similar >> to DCF where the final second of the minute is not modulated (MSF >> does something similar with a 500mS "carrier off" at the beginning >> of the minute. >> >> My guess is the seventh pip identifies the start of the minute, >> with the 6 pips beforehand being used for receivers to lock on, >> and identify the 2 second gap, with the 300 baud packet being >> used to carry the time information itself for the next minute. >> >> Now, do you have the ability to listen on 10MHz with a PK232 >> tones sound MODEM ? :) >> >> ---END INCLUDE MESSAGE--- >> >> I am hoping to get a recording or two of it (I don't have HF >> RF capability right now, but do have replay and 300 baud decode >> capability), to see if it really is 300 baud packet, but have any >> (Probably European) time-nuts hear this signal ? >> >> Anyone have any details on the time code ? I'm going to hope it >> might be possible to decode the time from the packet burst, but >> if anyone has any prior knowledge, then a head start is never a >> bad thing when trying to decode these things :) >> >> (BTW, the station seems to play music most of the minute, which >> quietens during the packet burst and pips) >> >> >> All the Best >> >> Iain >> >> >> >> >> > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
