| 摘要 |
<p>A test signal is aligned to a frame interval of a communication system. An alignment test signal having an alternating pattern of frequencies (220, 222, 224) is generated and transmitted over a communication link (108) that carries the alignment test signal in a sequence of frames (A, B, C). The alignment test signal is received over the communication link (108) as a return alignment test signal and then evaluated for frequency content. The start time of the alignment test signal is adjusted until the frequency content of the return alignment test signal corresponds to the alternating pattern of frequencies.</p> |
