75 ohm  coax cable   发泡fep同轴线缆
75-ohm  video cables are designed to minimize emi whileproviding low-loss transmission of video signals for security,means of an isolated second 95% coverage shield — the major benefitof a triaxial design, in-flight entertainment and cockpitdisplays.
used for video signals in cabin entertainment and otherair-borne applications, the outer shield is customarilygrounded   in order to provide a bypass for both inducedand electric  field noise currents. thus emi is significantlyreduced.
结构construction
中心导体:26awg 裸铜单导体 或绞合
绝缘： foam fep 发泡铁氟龙
绝缘：1.98mm±0.08mm
屏蔽： 铝箔麦拉   缠绕:38 awg 镀锡铜 95% 遮蔽率
护套(内层): telfon
外径：2.7±0.15mm
护套皮厚：0.25mm 最小点厚度：0.23mm
线材绞合: 同轴数量:1c
strength member:撕裂线
护套(外层): cmp pvc(颜色，白)
外径：4.0±0.25mm  护套厚度：0.30mm 最小点厚度：0.20mm
电气特性：
火花测试电压: 2000v
绝缘耐压测试: 2500vdc
电容: 16.8pf/ft.nom. 55.1pf/m.nom
阻抗: 75.0±3.0 ohms
传播速率: 81.0% nom.
直流电阻: 导体: 34 ohms/1000 ft.   111.5 ohms/km
屏蔽: 5.4ohms/1000 ft. 17.7ohms/km
衰减：
频率 mhz db/100ft.(nom.) db/100m.(nom.)
5mhz    1.30db               4.26db
10mhz   1.80db              5.90db
50mhz   3.80db            12.47db
100mhz   5.20db            17.06db
200mhz   6.80db         22.31db
500mhz  11.00db         36.10db
800mhz   14.50db       47.57db
1000mhz  18.00db        59.10db
2000mhz   25.40db       83.33db
3000mhz   33.50db        109.90db

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深圳市科普亚连接技术有限公司
王先生
13028890051
广东省