Abstract
The DTR100 multimode VHF transceiver produced by Italian OTE company is a state-of the-art communication unit. The air traffic control authorities in many areas currently used DTR100 to protect the VHF communication. The results of measured parameters must be a true reflection of the actual working condition of equipment. According to this thought, this paper first analyses the shortcoming of the standard CMS50 radio comprehensive measurement instrument, then introduces two virtues of OTE test box, and the implementation procedure on audio signal 600Ω impedance matching. Moreover, this paper is to improve to technical staff the routine operations and the maintenance, to play the best performance of the equipment, in order to ensure the rapid development of the civil aviation industry in China.
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