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Loggings => Shortwave Broadcast => Topic started by: Ct Yankee on July 20, 2023, 1215 UTC

Title: CHU 3330 AM 1212 UTC 20 JUL 2023
Post by: Ct Yankee on July 20, 2023, 1215 UTC: Surprisingly good reception here, English service

1212 OM "CHU Canada Coordinated Universal Time....twelve hours and twelve minutes..."
Title: Re: CHU 3330 AM 1212 UTC 20 JUL 2023
Post by: ~SIGINT~ on July 20, 2023, 1849 UTC: In addition, the digital time code from CHU is comparatively simple to decode. That "screeching" sound that you hear between the 31st and 39th seconds past the minute is nothing more than a Bell 103 compatible 300 baud modem formatted FSK signal.

You can decode the CHU digital time code using a KiwiSDR. Select the FSK mode from the Extension pull-down menu then select one of the CHU frequencies under the Ham/Utility pull-down menu.

CHU year=2023 DST=7 TAI-UTC=37 CHU 18:43:32 UTC (browser 18:43:32) CHU 18:43:33 UTC (browser 18:43:33) CHU 18:43:34 UTC (browser 18:43:34) CHU 18:43:35 UTC (browser 18:43:35) CHU 18:43:36 UTC (browser 18:43:36) CHU 18:43:37 UTC (browser 18:43:37) CHU 18:43:39 UTC (browser 18:43:39) CHU year=2023 DST=7 TAI-UTC=37 CHU 18:44:32 UTC (browser 18:44:32) CHU 18:44:33 UTC (browser 18:44:33) CHU 18:44:34 UTC (browser 18:44:34) CHU 18:44:35 UTC (browser 18:44:35) CHU 18:44:36 UTC (browser 18:44:36) CHU 18:44:37 UTC (browser 18:44:37) CHU 18:44:38 UTC (browser 18:44:38) CHU 18:44:39 UTC (browser 18:44:39)

Here is a bit of a look at CHU.

CHU, Canada’s Time Station - Look inside the facility that broadcasts voice time signals in two languages
https://www.radioworld.com/global/chu-canadas-time-station (https://www.radioworld.com/global/chu-canadas-time-station)
Title: Re: CHU 3330 AM 1212 UTC 20 JUL 2023
Post by: MDK2 on July 21, 2023, 0515 UTC: Quote from: ~SIGINT~ on July 20, 2023, 1849 UTC
In addition, the digital time code from CHU is comparatively simple to decode. That "screeching" sound that you hear between the 31st and 39th seconds past the minute is nothing more than a Bell 103 compatible 300 baud modem formatted FSK signal.

Thanks for that. (For the entire comment - I didn't want to repost it all.)
Title: Re: CHU 3330 AM 1212 UTC 20 JUL 2023
Post by: Ct Yankee on July 21, 2023, 1251 UTC: Yes, thank you very much. 8)
Title: Re: CHU 3330 AM 1212 UTC 20 JUL 2023
Post by: ~SIGINT~ on July 22, 2023, 0214 UTC: The "clock" module in MultiPSK will decode various time formats as received via an SDR or external receiver's audio to sound card input.

I have not found any free applications which can decode the time code from various providers. According to the various Sorcerer documentation that I have seen that application should decode time signals but I have not been able to figure out how to.