METHOD TO MEASURE DYNAMIC RANGE OF RADIO RECEIVER BY INTERMODULATION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC G01R23/20 

FIELD: radio engineering.

SUBSTANCE: inventions may be used to measure a dynamic range (DR) of a radio receiver by intermodulation. In the method for measurement of the radio receiver DR by intermodulation, a calibrating signal is sent to the radio receiver input with the frequency of f₀, and the rated output voltage U_R is set, then three signals are sent to the receiver input with identical levels of EMF and frequencies f₁, f₂, f₃, then signal levels are simultaneously regulated, until receiver output voltage will not settle as equal to U_R, the DR by intermodulation is determined in the form of f₁+f₂-f₃=f₀, afterwards the number of pairs and triplets of signals is calculated in a preselection filter pass band (PS FPB) and DR by intermodulation with account of the width of PS FPB, then the DR by intermodulation is measured of the summary form of f₁+f₂-f₃=f₀ and 2f₁-f₂=f₀, afterwards the DR by intermodulation is calculated with account of the PS FPB width, with the help of two signals the DR by intermodulation is calculated in the form 2f₁-f₂=f₀ with account of PS FPB width, from the measured values the least one is selected. The device to measure a dynamic range of a radio receiver by intermodulation comprises the first, second and third generators, an antenna equivalent, a radio receiver, a voltmeter, a load equivalent, an automated workplace (AWP), comprising a unit of digital signal processing, a PC, an optical transceiver, an optoelectronic/electronic-optical converter. The device also uses digital and fibre-optic communication lines.

EFFECT: provision of more accurate quantitative assessment of a dynamic range of a radio receiver by intermodulation and automation of measurements.

4 cl, 6 dwg