| 摘要 |
The application expansion device has a main unit with a quatro or twin converter supplying signals from 2 satellite planes to selective filter systems (1.1,2.1; 3.1,4.1), followed by directional couplers (5.1,6.1), their combined outputs fed to a high-pass filter (7.1). The output of the latter is combined with a specific signal spectrum obtained via a bandpass filter (8.1) and combined with an oscillator signal before bandpass filtering and a terrestrial signal fed through a low-pass filter (13.1), for providing an output signal.
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