Showing posts with label 10MHZdB/Km. Show all posts
Showing posts with label 10MHZdB/Km. Show all posts

Tuesday, August 26, 2014

DIFFERENCE BETWEEN SYV-75-3 AND SYV-75-5

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 20Ω/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