SU615425A1

SU615425A1 - Frequency spectrum analyzer

Info

Publication number: SU615425A1
Application number: SU731959399A
Authority: SU
Inventors: Аркадий Александрович Зыков
Original assignee: Предприятие П/Я А-3759
Priority date: 1973-08-27
Filing date: 1973-08-27
Publication date: 1978-07-15

Description

Изобретение относитс к обпасти радиоиэмеритепьной техники и может быть иопопьзовано при создании устройств дл анализа частотного спектра динамических процессов.The invention relates to radio-electronic equipment and can be used to create devices for analyzing the frequency spectrum of dynamic processes.

Известен анапизатор частотного спектра , содержащий источник входного сигнала , измерительные блоки, генератор пипсм образного напр жени , пинию задержки и сумматор .P.J . Недостатками этого ус1ь родства вп югс низка точность измерени и невозможность анализа динамических процессов.A known frequency spectrum anapiser containing an input source, measuring units, a pips-shaped voltage generator, a delay line and an adder .P.J. The disadvantages of this relationship are low measurement accuracy and the impossibility of analyzing dynamic processes.

Иаибопее бпнаким по технической суш ноств к предлагаемому лвп етс тор частотногоспектра, содержапшй Н иэ мерительных блоков, каждый, из которых состоит из последовательно соединенных смесител , фипьтра, квадратс а, детекто ра, фильтра низкой частоты и гетеродина а также, сумматор и источник входного , сигнала J2l . Недостатком этого анализатора вл етс недостаточно высока точность измерени .Iaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa''AmOr the proposed ToT is the frequency spectrum torus containing the measuring units, each of which consists of a series-connected mixer, filter, square, detector, low-pass filter, and heterodyne, J2l signal. The disadvantage of this analyzer is that the measurement accuracy is not high enough.

Целью изобретенн вл етс повышение точности измерени .The purpose of the invention is to improve the measurement accuracy.

Дл достижени этой це ли известныйTo achieve this goal, the famous

анализатор частотного спектра, содержащий N измерительных блоков, каждый из которых состоит нз последовательно соединенных смесител , фнльтра квадратора, детектора и фнльтра низкой частот Frequency spectrum analyzer containing N measuring units, each of which consists of nz series-connected mixers, a quadter fnltra, a low frequency fnltra detector

гетеродина, подключенного к входу смесител , а также сумматор и источншс входного сигнала, выход которого Св зав с входами измерительных блоков, снабжен генераторомсдвннутых по времени пилообразных напр жений, последовательно соединенными коммутат( и аналогсьцифровым преобразователем и блоком управлени . Выходы последнего св заныс входами коммутатора,-аналого-цифрового.the local oscillator connected to the mixer input, as well as the adder and input signal source, the output of which is connected to the inputs of the measuring units, is supplied with a generator of sawtooth voltages connected in time, connected in series to the switch (and analog to digital converter and control unit. The outputs of the last are connected to the switch inputs, -scan-digital.

преофазовател и сумматора, вход которого соединен с выходом аналого-цифро вого прео азовател , а 1входы коммут то а соединены с выходами измерительных блоков, при этом выходы генератораpreofazovatel and adder, the input of which is connected to the output of the analog-to-digital converter, and the 1 inputs of the commutator are connected to the outputs of the measuring units, while the outputs of the generator

Claims

the shifted pi of the time of the saw-tooth on rvAIA is connected to the control of the local oscillators and the control panel. On the chergez there is a block diagram of an anapator of the frequency spectrum. It holds the measuring bpok 1, connected to the input source 2, including mixer 3, home 4, filter 5, quad b, children Tt 7 and low frequency filter 8, and also generates 9 time-shifted sawtooth naf switch, Yu switchboard, analog-to-digital converter 11, totalizer 12 and control unit 13. The analyzer operates as follows. The input signal X (t) from source 2 is mixed in the mixer 3 with the signal of the local oscillator 4 and is fed to the filter S, which is tuned to the exact frequency. The filter response is quadraised with quadrax 6, detected by detector 7 and smoothed in low-pass filter 8. The signal from the gate of the first measuring unit is interrogated by the switch 1O, and then sequentially interrogates all measuring blocks. At the output of the filter 8 of each measuring unit, an estimate of the current spectrum of the process under study is obtained. (ou, i) “| x,. (t). . about. where t is the averaging time. In order to improve the accuracy of the obtained spectrum estimate, synchronous summation of the responses of the measuring units is used, carried out with successively connected switch 1O, analog-to-digital converter 11 and adder 12, controlled by the control unit 13. The summation of the responses ocjM is according to the algorithm G, x (t) J. (u, i, de H 1 is the number of "measuring units. Formula of the Invention A frequency spectrum analyzer containing H meters of power units, each of which consists of a series-connected mixer, filter, square a low frequency detector and a local oscillator connected to the mixer input, as well as an adder and an input source: the output is connected to the input of measuring units, characterized in that it is equipped with a gene for increasing the accuracy time-shifted saw-tooth voltages, sequentially connected by a switch and an analogue circuitry of preamphases (by an antenna and a control unit, the outputs of which are connected to the switchboard inputs, of an analog digital preophaser and an adder, whose input is connected to the output analog o-digital converters known as, and the switch inputs coeuifcneny with v1hodami measuring units wherein the alternator outputs shifted in time piloofaznyh voltages connected -k kshim control inputs heterodyne measuring units and sound control unit laziness. Sources of information taken into account in the examination: 1. The author's certificate of the USSR 408226, cl. ft O1 R 23 / OO, 2O.12.71.

2.Valitov R.A. and Sretensky V.N. Radio measurements, M., Radio ,, 197О, p.531-532.