Re: Measuring PL-380 Soft-Mute
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My PL-380 (2009.9 ver 1) now has an added USB interface. With this, I can read back the Si4734 soft-mute parameters as Tecsun has set them up. As previously measured, the software verifies that the maximum soft-mute attenuation is 6 dB. The parameters reveal some added details. The soft-mute threshold is actually 3 dB and the slope is 2 dB/dB. This means that there is no soft-mute effect at all for SNR readings of 3 or more. Below 3 dB SNR, the audio is attenuated 2 dB for every 2 dB decrease in SNR, up to a maximum of 6 dB when SNR reaches its minimum reported value of 0 dB.
--- In ultralightdx@..., "sdwillingham" <sdwillingham@...> wrote:
The conclusion is, PL-380 2009.9 ver 1 radios have about 6 dB