SYWV（Y）-75 Double-shield Physical Foaming Coaxial Cable

电缆

　

Technical  Indices
-5 -7 -9 -12

结

构

尺

寸

内导体直径(mm)
 diameter of  inner conductor

 1.00±0.02 1.66±0.02 2.15±0.02 2.77±0.02

绝缘外径(mm)
 outside diameter of insulation

 4.80±0.20 7.25±0.20 9.00±0.20 11.50±0.20

电缆外径(mm)
cable diameter

 7.20±0.30 10.30±0.30 12.30±0.30 15.00±0.30

电

　

气

　

性

　

能

绝缘电阻（KΩ.Km)
 insulation  resistance

 20000 20000 20000 20000

特性阻抗(Ω)
 characteristic impedance

 75±3.0 75±2.5 75±2.0 75±2.0

缆芯介电强度(KV)
 dielectric intensity of insulation

 1.6 1.6 1.6 1.6

护套介电强度(KV)
 dielectric intensity of protective sleeve

 3 4 6 8
回波损耗
echo  loss
≥dB		 VHF 20 20 20 20
UHF 18 18 18 18

　

衰减常数≤dB/100m
Attenuation  constant
频率(MHz) -5 -7 -9 -12
50 4.38 2.74 2.14 1.62
200 8.71 5.50 4.15 3.23
300 10.99 6.86 5.15 4.15
400 12.61 7.93 6.11 4.87
450 13.50 8.50 6.64 5.17
550 15.12 9.50 7.60 5.86
650 16.80 10.40 8.26 6.41
750 17.97 11.30 8.82 6.91
800 18.60 11.70 9.19 7.20
900 19.98 12.59 9.84 7.67
1000 21.01 13.30 10.40 8.08

　

屏蔽衰减
Shield attenuation
频率(MHz) dB
5 ≥60
50 ≥60
200 ≥70
500 ≥70
800 ≥70
　

Jiangsu Shanhu Cable Co., Ltd.(C)2002