The jpegs are to big for the list, but you can see the numbers.
73, hb9epu
On 11.09.2015 15:26, wully wrote:
Hi David
Since the conds are so difficult currently, I have made a local test
with two hpsdr-TRX on 7200kHz.
first TRX puts -22dBm into a Dummyload maximum freeDV700B. (Left upper
picture, the directional coupler reduces -67dB to -89dBm).
second TRX receives signal through a tiny loop with 3 turns, 10cm
diameter, about 2 meters away from the transmitting TRX.
in the first screenshot, the reception is at -102dBm peak. In the
"LPA300control" one can see, that sync is 1.
in the second screenshot the Signal is off: the background shows -106
to -104 dBm noise. So, I can hear the signal with 3 dB SNR.
Congrats David! That is quite a difference. I assume, that this comes
from the cohpsk- instead of the fdmdv- modulation?
I am very eager to test in the wild!
greetings, hb9epu, Alfred
------------------------------------------------------------------------------
_______________________________________________
Freetel-codec2 mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
