SYWV HD digital TV cable

Technical Data

National standard:GY/T 135-1998

Cable Structure

Application

Used for CCTV system below 1GHz, shared antenna system (CATV/MATV) as branch line and subscriber line, as well as connecting line or internal wiring of other high-frequency machines

High foaming degree, low dielectric constant, low capacitance, uniform impedance, high transmission rate, low attenuation constant, good anti-interference performance, good moisture resistance, stable structure, long service life, good flexibility, small bending radius, etc.


What is physical foaming:
The insulating medium layer is filled with inactive nitrogen gas to form a fine and uniform microporous structure, and the micropores are not connected to each other, similar to one sealed chamber. It has the advantages of high foaming degree and no foaming agent residues of polar molecules, so it has excellent transmission performance and is suitable for trunk cables, branch cables, user cables and network connections. Because it is impermeable to water and air, it has particularly stable performance and long service life.


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Sheath layer: Material - high quality PVC/ST4

1-2-3-4 Shielding layer: 1. One layer of high quality aluminum foil composite tape; 2. Two layers of tinned copper braid; 

3. Three layers of high quality aluminum foil composite tape; 4. Four layers of tinned copper braid

Insulation Layer: Material - Physically Foamed Polyethylene

Conductor: Material - oxygen-free copper


Product StandardsProduct numberProduct SpecificationsNumber of conductors NConductor diameter mmAverage thickness of core wire mmWeaving mesh XWeave density %Sheath outer diameter mm
GY/T135-1998,SJ/T11138.1SYWV75-5single(A+B)160AL111.98927.5
GY/T135-1998,SJ/T11138.1SYWV75-5single core 96AL111.98677.2
GY/T135-1998,SJ/T11138.1SYWV75-5 single core 128AL111.9881.67.2
GY/T135-1998,SJ/T11138.2SYWV75-7 single core 128AL11.662.886910.3
GY/T135-1998,SJ/T11138.2SYWV75-7 single core 144AL11.662.887510.3
GY/T135-1998,SJ/T11138.3SYWV75-9 single core 144AL12.153.4387012.3
GY/T135-1998,SJ/T11138.3SYWV75-9 single core 160AL12.153.43875.212.3



Electrical performance technical requirements

projectInsulation resistanceCharacteristic impedancedecay constantreturn lossShield attenuation
Test conditions500(DC)20℃200MHZ
unitMΩ·kmΩdB/100mdBdB
SYWV-75-5≥500075±3.05HMZ≤2.2300MHZ and below ≥20 300MHZ and above ≥185HMZ≥60
50HMZ≤4.850HMZ≥60
200HMZ≤9.7200HMZ≥70
550HMZ≤16.8500HMZ≥70
800HMZ≤20.3800HMZ≥70
1000HMZ≤24.2
SYWV-75-7≥500075±2.55HMZ≤1.5300MHZ and below ≥20 300MHZ and above ≥185HMZ≥60
50HMZ≤3.250HMZ≥60
200HMZ≤6.4200HMZ≥70
550HMZ≤10.7500HMZ≥70
800HMZ≤13.3800HMZ≥70
1000HMZ≤15.1
SYWV-75-9≥500075±2.55HMZ≤1.2300MHZ and below ≥20 300MHZ and above ≥185HMZ≥90
50HMZ≤2.450HMZ≥90
200HMZ≤5.0200HMZ≥100
550HMZ≤8.5500HMZ≥100
800HMZ≤10.4800HMZ≥100
1000HMZ≤11.9