Plain-language answer: Blocking dynamic range measures how well a receiver preserves a weak desired signal in the presence of a strong nearby signal that does not create the same intermodulation test products.
Why the definition matters
The result depends strongly on frequency spacing, bandwidth, phase noise, gain settings, and the chosen degradation criterion.
Use the number correctly
Compare published values only under matching conditions and test at spacings representative of the crowded bands you use.
The common mistake
Quoting a wide-spacing blocking number as guaranteed close-in performance.
Measurement and safety boundary
Keep reference units, bandwidth, detector, direction, averaging, and test conditions attached to every number. Current regulator requirements and the complete installed system control RF-exposure compliance.
