Determining SINAD from measured data

1. How do you calculate SINAD?
2. What is a good SINAD value?
3. What is 12 dB SINAD?
4. What is the difference between SINAD and SNR?

How do you calculate SINAD?

SINAD equals the RMS sum of THD + SNR. For the computed / entered SINAD, the corresponding RMS noise and the equivalent number of bits are shown in an output field at right.

What is a good SINAD value?

This 0.25 μV value is typical for VHF commercial radio, while 0.35 μV is probably more typical for UHF. In the real world, lower SINAD values (more noise) can still result in intelligible speech, but it is tiresome work to listen to a voice in that much noise.

What is 12 dB SINAD?

A SINAD value of 12 dB, corresponds to a 4:1 SNR or a signal containing 25 percent distortion. THE SINAD RECEIVER MEASUREMENT. To make the SINAD measurement a known signal, a 1 kHz audio tone is typically used to modulate the carrier frequency for which the receiver is tuned for proper demodulation.

What is the difference between SINAD and SNR?

Signal-to-noise ratio (SNR, or sometimes called SNR-without-harmonics) is calculated from the FFT data the same as SINAD, except that the signal harmonics are excluded from the calculation, leaving only the noise terms.