| 摘要 |
In an antenna pointing system, audio feedback to the operator is established by making use of an existing RF channel in the return path, e.g. an existing RF on/off channel (TDMA) in the return path. During antenna pointing, the return channel RF cable (52) or other connection means is disconnected from the transmitter input of the outdoor unit and is connected to a unit including an audio module (8). A demodulator such as an AM demodulator is required in the outdoor unit. In one aspect of the present invention, an indication for antenna positioning is based on a quality property of the signal received from the satellite, e.g. a received signal strength, until receiver lock on the forward signal. After this step, the indication is based on signal to noise ratio.
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