METHOD OF MEASUREMENT OF DYNAMIC RANGE OF RADIO RECEIVER BY INTERMODULATION Russian patent published in 1995 - IPC

FIELD: radio engineering measurements. SUBSTANCE: one signal is sent in band of channel of radio receiver, second (blocking) signal tuned away from frequency is sent to stopband of first intermediate frequency filter. Signals are increased by amplitude up to value E₁ under which amplitude of first signal across output changes to level characterized by blocking factor K₁, then blocking signal is increased to value E₂ characterized by blocking factor K₂. After this ratio of these two values is checked for correspondence to permissible deviation from calculated ratio which conforms to amplitude characteristics of radio receiver. Dynamic range of intermodulation is determined by results of measurements. EFFECT: increased authenticity of measurements.