Link-11 data on WWV time freq

brandon · #1 (**permalink**) 09-10-2009, 02:36 AM

Anyone else hearing what sounds like a Link 11 data transmission on 10000 kHz mixed with the WWV/WWVH time signal? Been active for at least a couple hours now.

kb2vxa · #2 (**permalink**) 09-10-2009, 09:16 AM

Relax, 10MHz is anything but clear channel, you'll hear everything from soup to nuts and often quite a jumble where nothing comes in clear.

chgomonitor · #3 (**permalink**) 09-12-2009, 08:41 AM

Not sure about the current WWV data format, check their web site, but I know they at least used to send the time signal out in some sort of data burst format embedded in the transmission. So do a number of other of 10.000 MHz time standard stations. In fact, I recall one of them sent only data. How sure are you it is LInk-11 format that you are hearing? Any decode on it?

brandon · #4 (**permalink**) 09-15-2009, 02:11 AM

Definitely not coming from WWVH or WWV.
I only hear it during the late afternoon and throughout the night, so its likely coming from the Pacific region. I also just tuned with receivers in Brisbane and Hong Kong and they also pick it up.

wa8vzq · #5 (**permalink**) 09-24-2009, 10:10 AM

The time code on WWV is on an IRIG-H subcarrier. If I remember correctly about 100 Hz & definitely does not sound like a Link-11.