Last updated: January 16, 2009
SINAD is a receiver audio quality measurement that is typically used for mobile stations operating on an analog system, such as AMPS. It is the ratio of Signal+Noise+Distortion divided by Noise+Distortion, expressed in dB. SINAD is measured using the test set's Audio Analyzer. SINAD can be measured in the range of 100 Hz to 10 kHz. For information on using the Audio Analyzer, see Audio Analyzer Measurement Description .
The SINAD measurement is used to determine receiver RF sensitivity. SINAD is usually measured either of two ways:
If you have previously used the Keysight 8920B RF Communications Test Set to measure SINAD, you may notice that the Keysight 8960 Series 10 test set's SINAD value may be lower by up to 0.8 dB when measuring 12 dB SINAD. This is due to the more precise digital notch filter used by the 8960, causing a more accurate noise measurement to be made. The 8920B uses an analog filter that does not have as tight a filter notch as the 8960.