COAXIAL CABLE -
DIFFERENCE BETWEEN SYV-75-3 AND SYV-75-5
Coaxial cable is widely used in connection for almost all
analog video surveillance systems. Similar to other low-end products, almost
all coaxial cable are made-in-china, these coaxial cables are compliant with
Chinese standard: GB/T14864-93.
In order to buy coaxial cable with correct specification,
you may want to know the difference between SYV-75-3 and SYV-75-5.
SYV means Solid polyethylene (PE) insulated coaxial
cable, 75 means impedance value, the following 3, 5, 7, 9, 12 stands for its
insulation outer diameter (respectively 3mm, 5mm, 7mm, 9mm, 12mm).
·
SYV-75-3: the connection distance between analog
camera and DVR ≤300 meters;
·
SYV-75-5: the connection distance between analog
camera and DVR ≤500 meters;
·
SYV-75-7 or SYV-75-9: the connection distance
between analog camera and DVR ≤800 meters;
·
SYV-75-12: the connection distance between
analog camera and DVR ≤1000 meters;
SYV COAXIAL CABLE SPECIFICATION
|
MODEL/SPEC
|
Impedance
|
Wire
core structure Root/diameter
|
Insulation OD (mm)
|
External diameter
|
Attenuation
30MHz 200MHz
|
|
SYV-50-1
|
50±3
|
7/0.09
|
0.87±0.05
|
1.9±0.10
|
0.336 0.873
|
|
SYV-50-2-1
|
50±3
|
7/0.17
|
1.6±0.10
|
2.9±0.10
|
0.302 0.524
|
|
SYV-50-2-41
|
50±3
|
1/0.68
|
2.2±0.10
|
4.0±0.20
|
0.129 0.341
|
|
SYV-50-3
|
50±3
|
1/0.9
|
3.0±0.15
|
5.0±0.20
|
0.10 0.264
|
|
SYV-50-5-1
|
50±3
|
1/1.37
|
4.8±0.20
|
7.2±0.30
|
0.0664 0.181
|
|
SYV-50-5-2
|
50±3
|
1/1.37
|
4.8±0.20
|
7.8±0.30
|
0.0664 0.181
|
|
SYV-50-7-1
|
50±3
|
7/0.76
|
7.3±0.25
|
10.3±0.30
|
0.0497 0.137
|
|
SYV-50-7-2
|
50±3
|
7/0.76
|
7.3±0.25
|
11.2±0.30
|
0.0497 0.137
|
|
SYV-50-9
|
50±3
|
7/0.95
|
9.0±0.3
|
12.2±0.4
|
0.0396 0.111
|
|
SYV-75-2
|
75±5
|
7/0.10
|
1.5±0.10
|
2.9±0.10
|
0.22 0.579
|
|
SYV-75-3
|
75±5
|
7/0.17
|
3.0±0.13
|
5.0±0.25
|
0.122 0.308
|
|
SYV-75-5-41
|
75±5
|
1/0.75
|
4.8±0.20
|
7.2±0.30
|
0.07.6 0.19
|
|
SYV-75-5-2
|
75±5
|
7/0.26
|
4.8±0.20
|
7.2±0.30
|
0.0785 0.211
|
|
SYV-75-7
|
75±5
|
7/0.40
|
7.3±0.25
|
10.3±0.30
|
0.051 0.140
|
|
SYV-75-9
|
75±5
|
1/1.37
|
9.0±0.30
|
12.2±0.40
|
0.0396 0.104
|
In other countries, coaxial cable use RG ratings to
distinguish between the different kinds of cables. RG59 coaxial cable is the
ideal choice for analog video surveillance system. Furthermore, for easy video
surveillance installation, people can choose Siamese coaxial cable which
consists of a RG59 cable merged together with a 2C power cable. Through using
Siamese coaxial cable you can run the power and video signal for your security
cameras simultaneously, which in turn, greatly reduce installation time and
cost. Generally, RG59 equals to SYV-75-5.
|
MODEL/SPEC
|
Conductor(No.of
threads/diameter)
|
(mm)
Insulation OD
|
(mm) OD
|
Max
Conductor resistance at 20℃Ω/km
|
Test
voltage
|
1KHZnF/Km
Static capacitance
|
10MHZdB/Km
Nominal Attenuation
|
|
1.5C-2V-75Ω
|
1/0.26
|
1.6
|
2.9±0.4
|
968
|
1000
|
69±4
|
96
|
|
2.5C-2V-75Ω
|
1/0.4
|
2.4
|
4.0±0.5
|
145
|
1000
|
69±4
|
52
|
|
3C-2V-75Ω
|
1/0.5
|
3.1
|
5.4±0.5
|
91.4
|
1000
|
67±3
|
42
|
|
3C-2VCS-75Ω
|
1/0.5
|
3.1
|
5.4±0.5
|
256
|
1000
|
67±3
|
42
|
|
3C-2VS-75Ω
|
7/0.18
|
3.1
|
5.4±0.5
|
100
|
1000
|
67±3
|
48
|
|
5C-2V-75Ω
|
1/0.8
|
4.9
|
7.4±0.5
|
35.9
|
1000
|
67±3
|
27
|
|
5C-2W-75Ω
|
1/0.8
|
4.9
|
8.3±0.5
|
35.9
|
1000
|
67±3
|
27
|