■ Product Standard SJ/T11138-1997
and
Enterprise
Standard
■ Brief Introduction
SYWV(Y)-75 type polythene
physical foaming cable is one kind of new products with low medium and wasting;
through injecting gas into medium foaming, it forms small close gas by choosing
proper technology parameter; this medium is not easy to aging and it is damp
proof.
Inner conductor of cable is red copper wire; the outer conductor is
aluminum tube or plastic strip with tinning strip copper or aluminum-magnesium
alloy weaving; the inner conductor of medium combines with each other tightly;
when temperature changes or draw, there will not be relative movement between
medium and conductor.
■ Application
Attenuation proportion of SYWV
(V)-75 type cable is smaller than that of radio frequency cable with same dimensions.
It is applicable for CATV and closed circuit television system to transmit high
frequency and ultra high frequency signal. The technical parameter has reached
international radio frequency cable standard. ■ Structure Dimension and
Electrical Performance
Type SYWV(Y)-75
-5
-7
-9
-12
Inner Conductor(mm)
1.0±0.02
1.66±0.02
2.15±0.03
2.77±0.03
Insulator(mm)
4.80±0.20
7.75±0.25
9.00±0.25
11.50±0.30
Outer Conductor(mm)
5.80
8.30
10.30
12.80
Jacket(mm)
7.20±0.30
10.30±0.30
12.30±0.30
15.00±0.40
Insulation Resistance(≥MΩ.Km)
5000
5000
5000
5000
Dielectric Strength of Cable Core(≥Kv)
1.6
1.6
1.6
1.6
Dielectric Strength of Jacket(≥Kv)
Cremation
3
5
8
8
Water-dipping
2
3
5
5
Capacitance(PF/m)
52
52
52
52
Characteristic Impedance(Ω)
75.0±3
75.0±2.5
75.0±2.5
75.0±2.5
Return Loss(≥dB)
VUF
20
20
20
20
UHF
18
18
18
18
Attenuation Constant(≤dB/100m)
50MHz
4.8
3.2
2.4
1.9
200MHz
9.7
6.4
5.0
3.9
550MHz
16.8
10.7
8.5
6.7
800MHz
20.3
13.3
10.4
8.2
Name: Qingdao Yuhua Wire & Cable Co., Ltd.
Add:2 Kilometers away From Tongsan Highway (East), Hong Kong Road (West), Jiaozhou
Tel:0532-82230588 82230688 Fax:0532-82230788
