FIELD: radio engineering, communication.
SUBSTANCE: method of measuring the dynamic range of a radio receiver on intermodulation includes transmitting to the input of the receiver noise emf EN, measuring output noise voltage UN and calculating nominal output voltage UV, transmitting to the input of the receiver a calibration signal at frequency f0 and establishing an output voltage UV, using two signals to measure and calculate the dynamic range on intermodulation of the third order and determining the level of emf of one of n noise signals in the band-pass of a pre-selection filter, varying simultaneously and in steps the frequency of noise signals with frequency step of ΔfI, and at each frequency step, varying simultaneously and in steps the level of emf of noise signals with an amplitude step Δe, simultaneously measuring corresponding output voltages and detecting two maximum values each, calculating the number of pairs of noise signals in the band-pass of a pre-selection filter corresponding to each frequency step, and determining overall output voltages, using calibration signals to determine the dynamic range on intermodulation of higher orders of the type f0=kf(k-1)-(k-1)fk with and without taking into account the band-pass of a pre-selection filter, from which the least are selected. A device for measuring the dynamic range of a radio receiver on intermodulation, comprising first and second generators, a matching device, a radio receiver, a voltmeter, an equivalent load, digital and fibre-optic links, an automated workstation, including a digital signal processing unit, a personal computer, an optical transceiver, an optoelectronic/electro-optical converter, connected to each other, includes a controlled switch, a noise generator and a storage device, connected to each other and other units of the device in the appropriate manner.
EFFECT: more accurate quantitative estimation of the dynamic range of a radio receiver on intermodulation.
5 cl, 7 dwg
