Hi LF EbNauters I have been building a disciplined Rx for LF, based in a GPS LO at 120KHz and a NE602 downconverter to 17KHz Then feeding the signal to the soundcard, also disciplined with 1pps from
Hi Luis, Are you sure that the phase shift is 180 deg? At 180 deg there should be no peak in the red spectrum (Markus' tool show_rawsyms3b). Are you transmitting the carrier permanently and just do t
Hi Stefan, EbNaut Not sure if the phase is exactly shifted 180º but should be. I pass the 137KHz signal trought an XOR gate, the other input of the XOR is controlled by the DTR level of a COM port un
Hello Luis, thanks for sharing your experiment. My auto-decoder https://www.qsl.net/iz7slz/ is already retuned for your transmissions. BTW QRM is large here in the morning time (urban location). I
Hi Domenico Sorry, Im not transmitting this weekend. Very stormy weather here, so the wires are down I will notice in the reflector any transmission in advance. But first want to confirm that all is
Hi Domenico Sorry, Im not transmitting this weekend. Very stormy weather here, so the wires are down I will notice in the reflector any transmission in advance. But first want to confirm that all
Hello Luis, Another hint: Try to use 4K19A and a shorter message, like EA5 or so. Use long symbols, like 10 seconds or longer. Then, timing is less critical and you may get a decode and can tune to t
