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MDS is a level 3 dB above the noise floor. The value of MDS is calculated with the
help of following formula.
MDS = kTBF
k = Boltzmann’s constant
T = Temperature in degree Kelvin
B = Noise Bandwidth
F = Noise Factor
Dynamic Range (DR)
Range of input powers at which a receiver can operate is called dynamic range of
Lower End: - Lowest detectable input power is sometimes characterized by the MDS
(Minimum Detectable Signal)
Upper End: - Third order intermodulation products (IP3) limits the performance of
the receiver at the upper end
A commonly accepted equation/definition for dynamic range is:
Signal to Noise Ratio (SNR).
Noise Factor (F). Cascaded system F.
Noise Figure (NF).
Minimum Detectable Signal (MDS).
Intermodulation (IM) distortion.
Second order intermodulation products.
Third order intermodulation products.
IP3 (Third Order Intercept) point.