This calculator allows you to determine the interference-free dynamic range (SFDR) of an RF receiver. It represents the range between the minimum detectable signal and the level where intermodulation distortions become dominant. This tool helps evaluate the performance and linearity of a radio frequency reception system.
Formulas
SFDR = (2/3) × (IIP3 − MDS)
If IIP3 is expressed in watts:
IIP3 (dBm) = 10 × log10(IIP3 × 1000)
Explanation of formulas
IIP3 represents the third-order intercept point, indicating the level at which the intermodulation products equal the fundamental signal. The MDS is the smallest signal the receiver can detect. SFDR, expressed in dB, indicates the range in which the signal remains clean and free from noticeable distortion.
Uses of the calculator
- Evaluate the performance of RF receivers and amplifiers.
- Compare the linearity of different reception systems.
- Optimize the sensitivity and spectral purity of RF equipment.
- Practical tool for radio design engineers and technicians.