请教指点信标工作频率

胡泽锋 · 发表于 2011-8-30 09:29:48

关于指点信标的工作频率书上只有75MHe，怎么在模拟考题里会出现一个12MHe?

翘首的熊 · 发表于 2011-8-31 15:01:07

如果是考试的话，请以考试书或者复习资料为准。如果是工作的话···

翘首的熊 · 发表于 2011-8-31 15:02:11

Marker Beacon Signal
The marker beacon antenna receives the 75 MHz signal and
sends it to a 75 MHz filter in the VOR/marker beacon (VOR/MB)
receiver 1. This filter tunes and rejects unwanted signals. The
output goes to a radio frequency (RF) amplifier. A detector
receives the amplifier output and sends the demodulated signal
to three bandpass filters.
The bandpass filters are at 400 Hz, 1300 Hz, and 3000 Hz. The
filters send the signals to an audio amplifier and to an input/
output (I/O) card. The audio amplifier sends audio tones to the
REU. The I/O card sends data to the DEU and the flight data
acquisition unit (FDAU).
The DEU shows marker beacon data on the PFDs.

家小村 · 发表于 2011-8-31 20:52:40

只知道有75兆、12兆还不知道、等待高手解答。

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[通用经验] 请教指点信标工作频率

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