device for measuring signals in the networks u0442u0440u0451u0445u043fu0440u043eu0433u0440u0430u043cu043cu043du043eu0433u043e wired broadcasting and resistance networks

摘要

the invention relates to measuring technique. specifically to devices used for the measurement of signals in the networks of broadcasting and u0442u0440u0451u0445u043fu0440u043eu0433u0440u0430u043cu043cu043du043eu0433u043e resistance networks.the essence of the invention is that the device for measuring variable voltages in the networks u0442u0440u0451u0445u043fu0440u043eu0433u0440u0430u043cu043cu043du043eu0433u043e broadcasting and resistance networks constant current, is introduced.extending the functional capabilities of the instrument and measuring with high accuracy the continuous voltage networks, industrial frequency voltage.the resistance networks u043fu0435u0440u0435u043cu0435u043du043du043eu043cu0443 current at a frequency of three radio programs (0.4; 78 and 120 khz).the input circuit of the channel for the measurement of the constant and variable voltages are symmetrically arranged.circuit transformation am signals of the second and third are u0441u0443u043fu0435u0440u0433u0435u0442u0435u0440u043eu0434u0438u043du043du043eu0439 scheme with the mixer, channel measurement u0441u043eu043fu0440u043eu0442u0438u0432u043bu0435u043du0438u0439 u043fu0435u0440u0435u043cu0435u043du043du043eu043cu0443 i with fast digital frequency synthesizer.u0441u0434u0432u0438u0433u043eu0432u044bu0439 resistor with the feedback digital to analog converters (dacs) and in complete sync detectors. the device has a microcontroller controlled by buttons on the control panel, and an alphanumeric display.the technical effect, the achievement of which is the proposed solution, improving the accuracy of measurement signals and the measurement accuracy u0441u043eu043fu0440u043eu0442u0438u0432u043bu0435u043du0438 i'm standing current lines.as well as increasing the functionality of the device, in particular to the measurement of the resistance of u043fu0435u0440u0435u043cu0435u043du043du043eu043cu0443 electricity.