Transmitting power radiation testing system of digital TV station in open ground environment

Abstract

The invention provides a transmitting power radiation testing system of a digital TV station in an open ground environment, and belongs to the field of performance index test of a radio transmitting system. The testing system comprises a directional receiving antenna, a power measuring device, a ranging and positioning device and a control device, wherein the directional receiving antenna is used for receiving electromagnetic waves transmitted by the digital TV station and converting the electromagnetic waves into an electric signal transmitted to the power measuring device; the power measuring device is used for calculating channel power Pr entering the receiving antenna according to the electric signal; the ranging and positioning device is used for measuring the height h1 of a transmitting antenna, the height h2 of the receiving antenna, and the distance L between the receiving antenna and the transmitting antenna; the control device comprises an equivalent isotropic radiated power (EIRP) estimating module which is used for calculating the EIRP of the tested station. With the adoption of the system, the station radio transmitting system including a transmitter and an antenna feeder system can be comprehensively and accurately monitored, and the working flexibility and independence can be greatly improved.

Description

Technical field [0001] The invention provides a radiation test system for the transmission power of a digital television station in an open ground environment, belonging to the field of radio transmission system performance index testing. Background technique [0002] In the prior art, the test of the transmission power of a digital TV station is mainly carried out by conduction. The station transmitter outputs the radio frequency power to the input end of the test equipment through the coupling port, and the transmitting power of the transmitter can be calculated according to the coupling power and the coupling coefficient received by the test equipment. This traditional conduction test method not only fails to investigate the influence of the antenna feeder system on the actual radiation characteristics of the station, but also often cannot be performed because the transmitter of the station does not have a coupling port or the coupling parameters of the coupling port are missi...

AI Technical Summary

Problems solved by technology

This traditional conduction test method is not only unable to investigate the influence of the antenna feed system on the actual radiation characteristics of the station, but also often cannot be carried out because the transmitter of the station does not have a coupling port or the coupling parameters of the coupling port are missing.

In addition, from the perspective of the actual effect of radio monitoring, because the traditional conduction test method requires the coordination and cooperation of multiple departments such as testing institutions and stations, the timeliness, flexibility and autonomy of monitoring work will also be affected.

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