有线电视手册.docx

第一章CATV工程设计标准1、工程设计规格表（引自 GY106-92, GY/T 121-95）条款内容摘要技术要求1上行频率范围5— 30MHz2卫星数字声音广播频率111.0 — 125.0MHz,中心频率为 118.0MHz3调频广播频率范围87.0MHz— 108.0MHz 载波频率间隔 400kHz4新电视制式频道频率配置在Z— 17~Z— 35之间指配频道5导频配置低导频：65.75/77.25MHz中导频：110.00MHz高导频：440.25/448.25/495.25MHZ6系统电视输岀电平60—80dBg V7系统广播输岀电平47—70dBg V860MHz内任意频道电平差<8dB9相邻频道电平差<3dB（邻频传输系统w 2dB）10伴音对图像电平差-14~-23dB11频道内幅频特性任意频道内：<± 2dB任意 0.5MHZ 内： w± 5dB12载噪比（带宽 5.75HMZ）>43dB13载波互调比CSO>54dB （电视频道内单频互调干扰 ）14载波组合三次差拍比 CTB>54dB15邻频抑制>60dB16带外寄生输岀抑制>60dB17色亮时延差w100ns18微分增益<10%19微分相位<10°20频道频率稳定度±25kHz21图像/伴音频率间隔稳定度±5kHz22系统岀口隔离度>22dB23相邻频道间隔8MHz24数据传输群时延<50ns25系统岀口阻抗75 Q2、CATV图像质量主观评价表用户端图像质量的主观评价是采用五级损伤标准，应参照国际 GB7401第4.2条五级损伤制标准执行,4级图像是CATV系统的设计标准等级图像质量损伤的主观评价(S/N) 5MH〈dB)CCIR(S/N)5分（优）图像上不觉察有损伤或干扰存在45.544.74分（良）图像上有稍可觉察的损伤或干扰，但不令人讨厌36.634.73分（中）图像上有明显觉察的损伤或干扰，令人感到讨厌29.9302分（差）图像上损伤或干扰较严重，令人相当讨厌25.4271分（劣）图像上损伤干扰严重，不能观看23.121对于中国电视制式 C/N=N+6.4dB,图像等级4级（S/N=36.6dB ）对应C/N=43dB3、米加权信噪比与图像等级关系公式(S/N) 5MHz=23-Q+1.1Q2(dB)(欧广联实验公式),(S/N) 5MHz指在5MHz带宽内测得的米加权信噪比(S/N) 6MHz=21-Q+1.1Q2(dB)(广电部补充公式)第二章CATV双向系统频率分割配置示意图5-8MHz状态监测、业务通讯8-22MHZ数字电视回传22-30MHZ回传模拟电视30-65MHZ交互式数据业务65-87MHZ隔离带87-108MHZFM广播(低端内含业务通讯频段)111-566MHZ下行模拟电视566-670MHZ下行数字电视670-750MHZ数据传输专用通道，传送交互式数据业务此频率分割配置适合大型综合业务网，上行通路较 5-30MHZ扩展35 MHz为开展交互业务提供可能；下行能路有 58个模拟电视频道可供使用，同时提供了 104MHz的下行数字压缩电视的频率空间， 约可传送120套的数字压缩电视节目，为提供NVOD服务创造了条件；在最高端有80MHz的带宽，可开展交互式数据业务。

第三章中国有线电视频道配置表编号频道代号频率范围图像载波频率伴音载波频率CH-1DS-148.5〜56.549.7556.25CH-2DS-256.5~64.557.7564.25CH-3DS-364.5~72.565.7572.25CH-4DS-476.0~84.077.2583.75CH-5DS-584.0~92.085.2591.15CH-6Z-1111.0~119.0112.25118.75CH-7Z-2119.0~127.0120.25126.75CH-8Z-3127.0~135.0128.25134.75CH-9Z-4135.0~143.0136.25142.75CH-10Z-5143.0~151.0144.25150.75CH-11Z-6151.0~159.0152.25158.75CH-12Z-7159.0~167.0160.25166.75CH-13DS-6167.0~175.0176.25182.75CH-14DS-7175.0~183.0176.25182.75CH-15DS-8183.0~191.0184.25190.75CH-16DS-9191.0〜199.0192.25198.75CH-17DS-10199.0〜207.0200.25206.75CH-18DS-11207.0~215.0208.25214.75CH-19DS-12215.0~223.0216.25222.75CH-20Z-8223.0~321.0224.25230.75CH-21Z-9231.0~239.0232.25230.75CH-22Z-10239.0~247.0240.25246.75CH-23Z-11247.0~255.0248.25254.75CH-24Z-12255.0~263.0256.25262.75CH-25Z-13263.0〜271.0264.25207.75CH-26Z-14271.0〜279.0272.25278.25CH-27Z-15279.0〜281.0280.25286.75CH-28Z-16287.0〜285.0288.25294.75CH-29Z-17295.0~303.0296.25302.75CH-30Z-18303.0~311.0304.25310.75CH-31Z-19311.0~319.0312.25318.25CH-32Z-20319.0~327.0320.25326.75CH-33Z-21327.0~335.0328.25334.75CH-34Z-22335.0~343.0336.25342.75CH-35Z-23343.0~351.0344.25350.75CH-36Z-24351.0~359.0352.25358.75CH-37Z-25359.0~367.0360.25366.75CH-38Z-26367.0~375.0368.25375.75CH-39Z-27375.0~383.0376.25382.75CH-40Z-28383.0~391.0384.25390.75CH-41Z-29391.0~399.0392.25398.75CH-42Z-30399.0~407.0400.25406.75CH-43Z-31407.0~415.0408.25414.75CH-44Z-32415.0~423.0416.25422.75CH-45Z-33423.0~431.0424.25430.75CH-46Z-34431.0~439.0432.25450.75CH-47Z-35439.0~447.0400.25446.75CH-48Z-36447.0~455.0448.25454.75CH-49Z-37455.0~463.0456.25462.75空463.0~470.0暂空CH-50DS-13470.0~478.0471.25477.75CH-51DS-14478.0~486.0479.25485.75CH-52DS-15486.0~494.0487.25493.75CH-53DS-16494.0~502.0495.25501.75CH-54DS-17502.0~510.0503.25509.75CH-55DS-18510.0~518.0511.25517.75CH-56DS-19518.0~526.0519.25525.75CH-57DS-20526.0~534.0537.25533.75CH-58DS-21534.0~542.0535.25541.75CH-59DS-22542.0~550.0543.25549.75CH-60DS-23550.0~558.0551.25557.75CH-61DS-24558.0~566.0559.25565.75CH-62Z-38566.0~574.0567.25573.75CH-63Z-39574.0~582.0575.25581.75CH-64Z-40582.0〜590.0583.25589.75CH-65Z-41590.0~598.0591.25597.75CH-66Z-42598.0~606.0599.25605.75CH-67DS-25606.0~614.0607.25613.75CH-68DS-26614.0~622.0615.25621.75CH-69DS-27622.0~630.0632.25629.75CH-70DS-28630.0~638.0631.25637.75CH-71DS-29638.0~646.0639.25645.75CH-72DS-30646.0~654.0647.25653.75CH-73DS-31654.0~662.0655.25661.75CH-74DS-32662.0~670.0663.25669.75CH-75DS-33670.0〜678.0671.25677.75CH-76DS-34678.0~686.0679.25685.75CH-77DS-35686.0~694.0687.25693.75CH-78DS-36694.0~702.0695.25701.75CH-79DS-37702.0~710.0703.25709.75。