| 摘要 |
PURPOSE: A method for converting automatic adaptive frequency of a wireless transmission unit by using an order wire channel is provided to reconnect a link by automatically finding non-interfered frequency when the link is interrupt due to interference, thereby improving the reliability of equipment. CONSTITUTION: It is determined whether a synchronizing signal is received(201). A wireless transmission unit sets a bit error rate test mode(203) and measures bit error rate of the signal being received from the other wireless transmission unit(205). The measured bit error rate is transmitted through an order wire channel(207). The wireless transmission unit examines whether the bit error rate regarding to a transmitting signal from the other wireless transmission unit(209). If receiving the transmitting signal in examining, the wireless transmission unit examines whether the received bit error rate is larger than a reference bit error rate(211). If smaller, the wireless transmission unit changes frequency(213) and transmits information regarding to the changed frequency to the other wireless transmission unit(215). If larger, the wireless transmission unit selects frequency when the received bit error rate is larger than the reference bit error rate and transmits information regarding to the selected frequency through the order wire channel(217). The wireless transmission units set up the selected frequency(219).
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