下面有关于CAI  COAXIAL CABLE 的规格及测试要求,请问该如何做才可满足测试要求? 请各位高手指点.

     1. Mechanical Specification

The mechanical specifications for the cable as follows:

Inner Conductor : To be copper

Diameter of Inner Conductor : 1.0 +/-0.02mm

Outer Braid / Tape : No contact between dissimilar metals

External Diameter of Sheath : 6.55 +/-0.3mm

Bending Radius : 40mm

Flexing Radius : 75mm

The DC resistance of the inner conductor should be <26 W/km.

The DC resistance of the outer conductor should be <15 W/km.

2.Longitudinal Loss (Attenuation)

(Reference BS EN 50117-1:1997 Section 11.8)

The attenuation of the cable under test should meet the following:

5 MHz :   < 1.6 dB/100m

50 MHz :  < 4.6 dB/100m

100 MHz :  < 6.5 dB/100m

200 MHz :  < 9.5 dB/100m

460 MHz :  < 15.0 dB/100m

860 MHz :  < 19.5 dB/100m

1000 MHz : < 21.5 dB/100m

1750 MHz : < 29.0 dB/100m

2150 MHz : < 32.5 dB/100m

3.Return Loss

(Reference BS EN 50117-1:1997 Section 11.6)

The return loss of the cable under test should meet the following:

5 - 30 MHz : > 23 dB

30 - 470 MHz : > 23 dB

470 - 862 MHz : > 20 dB

862 - 2150 MHz : > 18 dB

In each frequency band, 3 peak return loss values up to 4dB lower than the

stated specified limit are permissible.

先按Spec试试。不然怎么知道可不可以。

但绝缘一定Foam-PE

 用GAS PE較好.

一定用铜箔

西班牙的采用英表