To: | [email protected] |
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Subject: | Re: LF: 5 WPM Again... |
From: | Alberto di Bene <[email protected]> |
Date: | Mon, 14 May 2007 23:56:53 +0200 |
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Joe Craig wrote: I suspect that ARGO may reference its readings against the background noise and not be absolute. Running 1000 watts (4.5 amps) to 100m of wire up 10 m showed a 3 dB advantage over the previous system: 100 watts to a sloping 100m wire with the far end up 25 metres. The dBs reported by Argo are relative to the full scale of the ADC converter of the sound card, 0 dB being its saturation level, and so on. Of course that reading is influenced by the position of the level slider in the mixer panel of Windows, and by the setting of the volume knob of the radio... 73 Alberto I2PHD |
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