SU424084A1 - SPECTRUM ANALYZER FOR HAAR FUNCTIONS - Google Patents

Description

one

The invention relates to the field of electrical measurements and can be used in radio engineering, acoustics and apparatus for the analysis of broadband signals.

The well-known orthogonal analyzer on the Haar functions, containing a control device, electronic keys, an integrator, a simulator and an Indicator, has a limited operating range in the low-frequency region and an insufficient accuracy of spectrum measurement, which is associated with the difficulties of analog-troy analogue integrators. integration.

In order to extend the operating range towards infra-low frequencies and increase the measurement accuracy, a voltage transducer is introduced into the proposed analyzer in the number of pulses and a reversible counter. with increased accuracy determined by the number of bits of the binary revision counter and the error of the voltage converter in chi lo pulses.

The drawing shows the block diagram of the described analyzer, its controller 1, electronic key 2, voltage to voltage converter 3, reversible counter 4, indicator 5 and source 6 of the signals under study.

The device works as follows. The pulses from the output of control device 1 are fed to the control input of the electronic key 2 and open it for the duration of the existence of the selected Haar function. From the output of the electronic key 2, the signal arrives at

the input of the converter 3, where the signal voltage is converted into a number of pulses. Converter 3 is synchronized from control device 1. Pulses 1 from the output of converter 3 are summed, 3 are then subtracted into

reversive counter 4. Time of sum: peace,

as well as the subtraction time, is equal to half the duration of the Haar functions and is given by

Pulse from control device 1.

The result of the summation and subtraction of vThcoB in the reversible counter 4 is recorded by indicator 5 and coincides with the measured value of the spectral component with accuracy to a constant multiplier. Investigated signal from source 6 arrives

at the input of the key 2 n control device 1 to synchronize it.

Subject invention

The spectrum analyzer according to the Khabar functions, which contains a control device, an electronic key, an indicator and a source — to the studied silnal, the outputs of which are connected to the inputs of the electronic key and the controller: 1, | By the fact that, in order to expand the working range in the direction of low frequency frequencies and precision of measurements, the measurement of the spectrum, it is equipped with a voltage connected to the number of pulses and a reverse C41 tchn1kom, control inputs of which are connected to respective outputs of the control device, Trichen input transducer voltage among imnulsov comp | I1nen output with the electronic key, and an output connected to a reverse schetch.ika in: Odom indicator.