Method for testing radiation of transmitting power of digital television station in open ground environment

Abstract

The invention provides a method for testing radiation of transmitting power of a digital television station in an open ground environment and belongs to the field of performance index testing of a radio transmission system. The method comprises the steps of setting the center frequency f of a power measurement device, adjusting the polarization direction and pitching direction of a receiving antenna, finding a signal maximum value and then fixing the receiving antenna, measuring and recording the height h1 of a transmitting antenna, the height h2 of the receiving antenna and the distance L between the transmitting antenna and the receiving antenna, measuring the channel power Pr received by the receiving antenna, and calculating the equivalent isotropic radiated power (EIRP) of the tested station according to the following formula: EIRP=Pr-Gr+Lr+Lprop+Pb, wherein the Gr represents gain of the receiving antenna, the Lr represents loss of the receiving antenna and a connector, the Lprop represents spatial propagation loss and the Pb represents compensation power. By the adoption of the method, comprehensive and accurate monitoring of the station radio transmission system including a transmitter and an antenna feed system can be achieved, and working flexibility and automation can be greatly improved.

Description

technical field [0001] The invention provides a radiation test method for the transmission power of a digital TV station in an open ground environment, and belongs to the field of performance index test of a radio transmission system. Background technique [0002] In the prior art, the test of the transmitting power of the digital TV station is mainly conducted through conduction. The transmitter of the station outputs the RF power to the input terminal of the test equipment through the coupling port, and the transmission power of the transmitter can be calculated according to the coupling power and coupling coefficient received by the test equipment. 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 ...

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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