To: | [email protected] |
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Subject: | Re: LF: Ebnaut tonite from JN80 |
From: | Domenico IZ7SLZ <[email protected]> |
Date: | Tue, 29 Jan 2019 19:20:03 +0100 |
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LF, EbNauters Rob has sent his wave file coming from the Spectrum Lab EbNaut recorder With the help of the linux programs vtwavex i have converted it in the vlfrx-tools native .vt file and i have attempted the decode. Indeed the only possible decode is Riccardo's transmission of 2108-01-27_23:00 obtained with 0.4s of time offset initial reference phase 58.9 amplitude 7.760e-02 phase 0 0 0 0 0 found rank 0 ber 3.8095e-01 Eb/N0 1.4 M -1.078971028e+00 ph 0 0,0,0,0 [73] carrier phase: 2.3 deg carrier Eb/N0: 3.2 dB carrier Es/N0: -11.53 dB carrier S/N: 13.73 dB in 496.0 uHz, -19.31 dB in 1Hz, -53.29 dB in 2.5kHz Then I have investigated on failed decodes on my frequency slot at that hour. Knowning the message 'IZ7SLZ' and using the signal analysis function of EbNaut I found (with +0.001 Hz of frequency offset): carrier phase: -113.4 carrier Eb/N0: -7.2 dB carrier S/N: 8.09 dB in 595.2 uHz, -24.16 dB in 1Hz, -58.14 dB in 2.5kHz Maybe >6 dB are necessary to pass my full callsign in 30 minute of transmission. Thanks again Rob for the attempt. 73, Domenico IZ7SLZ On Mon, 28 Jan 2019 at 15:09, Domenico IZ7SLZ <[email protected]> wrote:
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