DME ground apparatus
First Claim
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1. A DME ground apparatus comprising:
- an aerial unit that receives an interrogation signal from an aircraft;
a transponder unit that receives the interrogation signal from the aerial unit, generates a response signal in response to the interrogation signal and generates and transmits squitter pulses; and
a monitor control unit that monitors and controls the transponder unit, whereinthe transponder unit monitors a transmission rate at which the response signal is transmitted, which has been generated by decoding the interrogation signal received, and, in accordance with a result of monitor, transmits the response signal when the transmission rate reaches a preset value, and transmits the squitter pulses in place of the response signal when the transmission rate does not reach the present value.
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Abstract
In a DME ground apparatus, under the control of a transmission-rate monitoring control unit, the transponder unit decodes an interrogation signal it has received and generates a response signal. The transmission rate at which to transmit the response signal is monitored. If the result of the monitoring indicates that the transmission rate has reached a preset value, the response signal is transmitted from the DME ground apparatus. If the result of the monitoring indicates that the transmission rate has not reached a preset value, squitter pulses are transmitted from the DME ground apparatus.
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Citations
7 Claims
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1. A DME ground apparatus comprising:
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an aerial unit that receives an interrogation signal from an aircraft; a transponder unit that receives the interrogation signal from the aerial unit, generates a response signal in response to the interrogation signal and generates and transmits squitter pulses; and a monitor control unit that monitors and controls the transponder unit, wherein the transponder unit monitors a transmission rate at which the response signal is transmitted, which has been generated by decoding the interrogation signal received, and, in accordance with a result of monitor, transmits the response signal when the transmission rate reaches a preset value, and transmits the squitter pulses in place of the response signal when the transmission rate does not reach the present value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification