Method and apparatus for monitoring operation status of broadcast television satellite transmission system
A transmission system, radio and television technology, applied in television, electrical components, image communication, etc., can solve problems such as high labor intensity, inability to provide timely and accurate early warning information, and unsafe broadcast work
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[0019] As shown in Figure 1, the working principle of this device:
[0020] When working normally, the uplink power, downlink power and carrier-to-noise ratio are all within the normal range, ensuring that the bit error rate is within the normal range, and programs can be received normally.
[0021] Natural interference (such as rain attenuation, etc.) or equipment failure will only cause the bit error rate to rise to a complete bit error. In this case, the useful power of the channel should be significantly smaller in most cases.
[0022] In the case of single carrier and narrowband interference, the man-made interference is similar to the natural interference observed from the receiver. A single carrier (or narrowband) peak can be seen on the spectrum of the downlink signal. In the case of interference with signals with the same parameters (same bandwidth, symbol rate, and modulation mode), the power of the downlink signal is basically unchanged when the satellite transpond...
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