| 摘要 |
<p>APPARATUS FOR REMOTE CONTROL OF ANTENNA ROTATORS Apparatus for controlling the position of an antenna rotator from remote locations includes a sender unit which generates desired antenna position information and a control circuit associated with an antenna rotator. The sender includes a dial for selecting the desired antenna position, a control transmitter responsive to the position of the dial for providing an output at a first frequency containing the antenna position information and a holding circuit for continuing the output of the control transmitter until the antenna reaches the desired position. The sender also includes a receiver responsive to a signal at a second frequency from the control circuit for terminating the operation of the control transmitter. The antenna control circuit includes a receiver tuned to the first frequency to provide an electrical signal representative of desired antenna position; circuit means for comparing this signal to an electrical signal from the antenna rotator representative of the actual antenna position, and from these two signals, control signals are applied to the antenna rotator to cause it to rotate to the desired position; and a release transmitter for generating an output at the second frequency when the antenna rotator reaches its selected position. When a plurality of senders are used, each sender is provided with a circuit to inhibit any output from its control transmitter whenever another sender is in operation.</p> |
