Good day LF, I have activated a beacon on 137.485 kHz sending an EbNaut message every 30 minutes starting at .00 and .30. Message lenght is 13 characters at 1 s/symbol. Coding = 8K19A Duration is 14'
Hello Domenico, When recording EbNaut samples, do you have to compensate for the lag due to the huge decimation factor ? In other words is it ok or not, to start recording your H:00 transmission at H
Hello Michel, The SL recorder function (thanks Wolf !) takes input from FFT and performs (i think) the inverse-FFT and all necessary calculations (including any lags) in order to align the audio with
Hello Domenico, A nice idea :-) The QRN is extreme already and propagation on LF is not good to that time on our distance. I have tried the 10:30 UTC transmission without success. I will try a later
Hello Stefan, Michel and all, In fact the 'EbNaut recorder' configuration doesn't use the FFT for decimation. But it uses the same class of pre-processing to decimate the sampling rate for the record
Thanks a lot Domenico, now time to try to decode the files ... Michel - f5wk Hello Michel, The SL recorder function (thanks Wolf !) takes input from FFT and performs (i think) the inverse-FFT and all
Thanks a lot Domenico, now time to try to decode the files ... Michel - f5wk Hello Michel, The SL recorder function (thanks Wolf !) takes input from FFT and performs (i think) the inverse-FFT and al
Hello Domenico, I tried the 20 UTC transmission and got an immediate decode. It is a big signal, despite the strong QRN. Capture attached. 73, Stefan Am 04.06.2016 12:06, schrieb IZ7SLZ: Good day LF,
Another decode on your first message in the morning, 9:30 UTC. Later, a thunderstorm went over Heidelberg, causing heavy QRN on all bands :-) So you're coming through at night and in the morning or m
Hi Domenico, LF, First decode, ever Frequency accuracy needs improvement, which requires the change of the two DDS of the RX/TX and an updated PIC firmware to support 48 bit FTW ... Michel - f5wk Le
Hello LF, EbNaut LF beacon transmissions from here (Apulia - South ITALY) ended yesterday with last message at 21.00 UT . Many thanks to Stefan DK7FC and Michel F5WK for their reports and congratulat
Hi Domenico, Fine. And what about VLF? :-) I think i have the ideal (!!!!!!!!!!!!!!!!!!) VLF loading coil arrangement idea!! Just an idea so far, not tried yet. But i will! I will report in a separat
Hi Domenico, five successful decodes here, but nothing during the high-QRN afternoon hours: UT car sym start dB dB 09:30 2.5 4.1 10:00 1.9 3.9 10:30 0.4 2.1 ... nil ... 20:30 12.4 11.7 21:00 17.1 15.
