21 CTI Cable Division

 

Home:

   21 Computech.com

About Manufacturer:

   Manufacturer

Contact Us:
   Contact Us

Coaxial Cables
   50 OHM Radiating
   Base Station Feeder

   DF-B Series
   JX412

   JX500
   JX540

   LMR Series 
   Mini Coaxial Cable

   RF100
   RF195

   RF400
   RG6-CCS

   RG6U
   RG7

   RG11
   RG11U

   RG59

   RG59U 
   RG174U

Communication Cables
   50pr Telephone Cable
   100r Telephone Cable

   LAN Cable
   Cat 5e

   Cat 6 
   Cat 5e (LSZH)

   Cat 6 (LSZH)
   Communication Cable

   DSL Cable 24pr
   DSL Cable 25pr

   DSL Cable 32p
   HYAC 50pr

   Indoor Cable
   SEYVP0.4

   SEYVP(V)0.5 
   SEYVP(V)0.6

   SEYVPX2X0.4

   SEYVPX2X0.5 
   SEYVPX2X0.6

   Telephone Cable

Customized Cables
   16pr
   64pr

   Mini Flex Stranded Wire

Fiber Optic Cables
   ADSS 2-12 CORES
   GYA 2-144 CORES

   GYFTA 2-144 CORES
   GYFTY 2-144 CORES

   GYTA53 2-144 CORES
   GYTA 2-144 CORES

   GYTC85 2-12 CORES
   GYTS 2-144 CORES

   GYTY53 2-144 CORES
   GYXTA 2-12 CORES

   GYXTC8S 2-12 CORES
   Performance

   Type Designation

High Temperature Cables
   RG142
   RG179

   RG316



 

RG7 SERIES

Physical Dimensions

Component

Standard Shield
mm

Tri Shield
mm

Quad Shield
mm

Center Conductor

1.30

1.30

1.30

Dielectric

5.72

5.72

5.72

Outer Conductor

6.59

6.74

7.46

Jacket

8.08

8.20

8.59

Jacket Wall Thickness

0.76

0.75

0.70

Messenger

single

1.83

1.83

1.83

dual

2.72

2.72

2.72

Mechanical Characteristics

Electrical Characteristics

Minimun Breaking Strength
of Messenger

single

166kgf

dual

816kgf

Dielectric Adhesion

>20N/5cm

Capacitance

50±3.0 nf/km

Impedance

75±3.0 ohms

Velocity of Propagation

85%

Shielding
Effectiveness

55MHz

≥60dB

300MHz

≥70dB

1000MHz

≥70dB

Return Loss
(100% swept)

1～470MHz

≥22dB

470～1000MHz

≥20dB

1000～2200MHz

≥18dB

Notes:
1. The conductivity should be more than 23% when CCS is used as inner conductor.
2. 60% coverage for inner shield, 42% coverage for outer shield.

Attenuation (20℃)

Frequency(MHz)

Maximum(dB/100m)

Frequency(MHz)

Maximum(dB/100M)

5

1.54

400

10.73

55

4.10

450

11.35

83

4.92

500

12.04

187

7.28

550

12.63

211

7.74

600

13.28

250

8.40

750

14.99

300

9.25

865

16.17

350

10.01

1000

17.45

 

Copyright © 2007,  21 Computech, Inc. All Rights Reserved.