Performance requirements for airborne marker beacon receiver
This standard specifies the performance requirements for 75 MHz airborne marker beacon receiver, which may serve as the basis for the development of airborne marker beacon receiver product standards.
1 Terms
1.1 Class A receiver: marker beacon receiver applicable to route flight and approach.
1.2 Class B receiver: marker beacon receiver applicable to approach.
1.3 Receiver threshold: A state when the specified standard test signal level generates instructions of turning on the indicator light (just lit) and the audio output is at least 20% of the rated value.
Note: The standard test signal is a radio frequency modulated signal with a frequency of 75±0.005％MHz, a modulation degree of 95％±3％, and modulation frequencies of 400±1％MHz, 1,300±1％Hz and 3,000±1％Hz respectively.
2 General requirements
2.1 Work of controller
The controller intended for use during the flight, regardless of the possible combination forms and control procedures adopted, shall not damage the work performance of the receiver.
2.2 Accessibility of controller
Controllers that do not need to be adjusted during flight shall be inaccessible to the pilot.
2.3 Adjustment range of receiver threshold
1 Terms
2 General requirements
3 Requirements for performance under normal atmospheric conditions
4 Requirements for performance under environmental conditions
