| 摘要 |
PURPOSE:To grasp the RF characteristic of a high vision broadcast receiver system without interrupting the transmission of a broadcast wave, while making the measuring work easy. CONSTITUTION:After a VIT signal included in the MUSE signal output from a high vision broadcast receiver system is picked up by a synchronous detecting circuit 2 and an A/D converter circuit 3, the SI ratio to be the reflected wave component characteristic in the VIT signal is measured by an SI ratio operation circuit 4, and at the same time, a delay time to be the reflected wave component characteristic in the VIT signal is measured by the first DFT circuit 6 and a correcting circuit 7, the second DFT circuit 8, and a peak detecting circuit 9. And, depending on the SI ratio and the delay time, the DU ratio of the RF band, and the delay time, in the high vision broadcast receiver system, is displayed. |
