型号用途 1、SYV:实心聚乙烯绝缘射频同轴电缆2、SYWV(Y):物理发泡聚乙绝缘有线电视系统电缆，视频（射频） 3、同轴电缆（SYV、SYWV、SYFV）适用于闭路监控及有线电视工程| 电缆型号 | 内导体结构mm | 绝缘外径mm | 编织屏蔽层数 | 电缆外径mm | 特性阻抗Ω | 衰减常数(20℃) | | 频率(MHz) | 衰减≤dB/m | | SYV-50-2-1 | 7×0.16 | 1.50±0.10 | 1 | 2.8±0.2 | 50±2 | 200 | 0.450 | | SYV-50-2-7 | 7×0.16（铜包钢） | 1.50±0.10 | 1 | 2.8±0.2 | 0.450 | | SYV-50-2-8 | 7×0.16（铜包钢） | 1.50±0.10 | 1 | 2.8±0.2 | 0.450 | | SYV-50-2-41 | 1×0.68 | 2.20±0.10 | 1 | 4.0±0.2 | 0.310 | | SYV-50-3-1 | 7×0.32 | 2.95±0.13 | 1 | 5.0±0.2 | 0.240 | | SYV-50-3-3 | 1×0.90 | 2.95±0.13 | 1 | 5.0±0.2 | 0.220 | | SYV-50-3-4 | 1×0.90 | 2.95±0.13 | 1 | 5.0±0.2 | 0.220 | | SYV-50-3-5 | 1×0.90 | 2.95±0.13 | 2 | 5.8±0.2 | 0.220 | | SYV-50-3-41 | 1×0.90 | 2.95±0.13 | 2 | 5.8±0.2 | 0.220 | | SYV-50-5-1 | 1×1.40 | 4.80±0.20 | 1 | 7.2±0.3 | 0.150 | | SYV-50-5-3 | 1×1.40 | 4.80±0.20 | 1 | 7.2±0.3 | 0.150 | | SYV-50-5-4 | 1×1.40 | 4.80±0.20 | 2 | 7.9±0.3 | 0.150 | | SYV-50-5-41 | 1×1.40 | 4.80±0.20 | 2 | 7.9±0.3 | 0.150 | | SYV-50-7-1 | 7×0.75 | 7.25±0.25 | 1 | 10.3±0.3 | 0.110 | | SYV-50-7-2 | 7×0.75 | 7.25±0.25 | 1 | 10.3±0.3 | 0.110 | | SYV-50-7-3 | 7×0.75 | 7.25±0.25 | 2 | 11.0±0.3 | 0.110 | | SYV-50-7-4 | 7×0.75 | 7.25±0.15 | 1 | 10.3±0.3 | 50±1 | 3000 | 0.620 | | SYV-50-7-6 | 7×0.75 | 7.25±0.15 | 2 | 11.0±0.3 | 0.620 | | SYV-50-7-41 | 7×0.75 | 7.25±0.25 | 2 | 11.0±0.3 | 50±2 | 200 | 0.110 | | SYV-50-9-41 | 7×0.95 | 9.00±0.30 | 1 | 12.2±0.4 | 0.095 | | SYV-50-12-1 | 7×1.15 | 11.50±0.30 | 1 | 15.0±0.4 | 0.080 | | SYV-50-12-41 | 7×1.15 | 11.50±0.30 | 1 | 15.0±0.4 | 0.080 | | SYV-50-15-41 | 7×1.54 | 15.00±0.40 | 1 | 19.0±0.5 | 0.065 | | SYV-50-17-1 | 1×5.00 | 17.30±0.40 | 1 | 22.0±0.5 | 0.056 | | SYV-50-17-2 | 1×5.00 | 17.30±0.40 | 1 | 22.0±0.5 | 0.056 | | SYV-50-17-3 | 1×5.00 | 17.30±0.40 | 2 | 22.7±0.5 | 0.060 | | SYV-50-17-41 | 19×1.04 | 17.30±0.40 | 1 | 22.0±0.5 | 0.060 | |