[Premium-Rx] RA6793A Sensitivity?

[Michael Riley]

Raymond ON4DBV,

Your implication that there is a "design blunder" in the definition of 
the decibel could not be more wrong.

There is nothing wrong with the definition the decibel.

If you did the math in applying the definition of the decibel to voltage 
and power - you would understand why your statement is so wrong.

> Due to a quirk (actually a design blunder) in the definition of the
> decibel, the amount in decibel is doubled for voltages as compared to
> powers.

Regards,  Mike.


On 4/8/2017 7:20 AM, fintronicsusa wrote:
> Yes, thanks Raymond... that does help very much.
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
> -------- Original message --------From: Raymond Boute <raymond.boute at pandora.be> Date: 4/8/17  2:16 AM  (GMT-05:00) To: fintronicsusa <fintronicsusa at gmail.com> Subject: Re: [Premium-Rx] RA6793A Sensitivity?
> Dear Glenn,
>
> As far as I remember, the RA6793A scale is in decibel-microvolt, with
> 3 vertical bars for every 10 dB, to a maximum of 120 dB.
>
> Due to a quirk (actually a design blunder) in the definition of the
> decibel, the amount in decibel is doubled for voltages as compared to
> powers.  Furthermore, the impedance of your source must be matched to the Rx.
>
> Keeping all this in mind, 10 microvolt amounts to 20 dB, 100
> microvolt to 40 dB, 1 mV to 60 dB etc., and 120 dB to 1 V.
>
> Hope this helps.
>
> 73
> Raymond ON4DBV
>
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