| 摘要 |
<p>An analog or digital signal mixed with digital paths in a packet mode may be the video signal of a television channel wherein the digital paths transmit teletext messages. The packets are inserted at least in the active parts of free lines of the raster synchronization signal, on the basis of one packet per line. The measurement equipment comprises for one selective digital path, means (2) to detect the address of the digital path in the signal packets (SV) and means for counting (3) and displaying (5) parameters such as the number of packets received, the number of erroneous packets received, the number of lost packets not received, the number of received data words and the number of received erroneous data words during a cyclic predetermined duration. A plurality of digital paths mixed in analog or digital signals (CT) may be processed by the equipment.</p> |
