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Rank: Advanced Member
Groups: Member
Joined: 7/30/1998
Posts: 42
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As the subject says, what does that term "12dB SINAD sensitivity" mean?
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Rank: Member
Groups: Member
Joined: 7/22/1998
Posts: 11
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12 dB SINAD (Signal, intermod, noise and distortion (I think)) is a standard for received audio quality.
The the sensitivity of a receiver is quantified using this 12 dB sinad.
ie, 12 dB SINAD @ -121 dBm in the rcvr front end.
A SINAD meter measures the received audio (1kHz or 400Hz) signal and compares it with a pure tone of the same frequency. The difference is the noise and distortion on the received audio. 12 dB has been established as acceptable for clear reception.
I think this is pretty accurate, anyone dispute this?
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Rank: Elite Member
Groups: Member
Joined: 12/2/1998
Posts: 400
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SINAD stands for "Signal to Noise and Distortion Ratio".
Intermod is included in the distortion.
as compared to,
S/N which stands for Signal to Noise Ratio.
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Rank: Elite Member
Groups: Member
Joined: 7/12/1998
Posts: 1,348
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I dont dispute the intention of the answer, but SINAD measures the amplitude of the wanted tone ( eg 1 kHz ) and compares this amplitude with all the rubbish (eg noise and harmonics etc) that remain when it is notched out. A SINAD meter has an internal notch filter that removes the tone, and a RMS detector to measure the left over bits and pieces still coming out. It also measures the tone power. It converts this ratio to a Signal To Noise And Distortion SINAD ratio (as per Analog Kid's post) :)
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