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OTDR Module
Product Structure and Appearance
The product structure of the OTDR module is a metal shell, and the surface of the shell is oxidized. At the same time, in order to ensure the heat dissipation needs of the internal devices of the module, the heat dissipation hole design is added to the side of the shell. The specific dimensions of the shell design are shown in Figure 1.
Top View
Side View
Bottom View
Figure 1 Enclosure Design Dimensions (in mm)
Technical Indicators
The OTDR module products provided by our company have multiple models and specifications. The main technical indicators of the general model products are shown in Table 2, and the models are only listed in part. It supports customization of various models.
Table 2 Main technical indexes of general model products
|
Product model |
M4745A |
M4500C |
M4300D |
M4000D |
M3800D |
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|
Dynamic range |
≥47dB/45d B |
≥45 d B |
≥43 d B |
≥40 d B |
≥38 d B |
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Measured parameters are 300km/20us/180s, SNR = 1, at 25 ° C |
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Operating wavelength |
1310±20nm&1550±20nm |
1550±20nm |
1625±20nm |
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Test range |
1,5,10,25，30,50，60，80,100,125，160,180,260，300 km |
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Pulse width |
5,10,20,40,80,160,320,640,1280,2560,5120,10240,20480 ns |
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Events/Attenuation Blind area |
≤1.2m/6.0m |
≤1.2m/6.0m |
≤1.2m/7.0m |
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Measurement parameters are 1km/5 ns/15s, at 25 ℃ |
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Test distance Uncertainty |
± (0.75 + 5 × 10 -5 × distance + sampling resolution) m |
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Power supply |
DC working voltage + 6 V ~ 12 V, voltage ripple less than 20 mV |
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Module power consumption |
≤10W |
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Number of sampling points |
32,000 |
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Electrical interface |
2 × 10 double row pins with 2mm pitch (default) or 2 × 10 double row pins with 1.27 mm pitch |
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Fiber optic interface |
9/125 µm single-mode fiber, connector type FC/UPC (except for special requirements of the user), length approx. 50 cm |
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Structural dimensions |
Metal housing, L × W × H = 143mm × 89mm × 17mm |
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Use environment |
Working temperature: -5 ℃ ~ + 55 ℃ |
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Storage temperature: -40 ℃ ~ + 85 ℃ |
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Relative humidity: 5% ~ 85% (non-condensing) |
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The corresponding relationship among the test range, pulse width and sampling accuracy of the OTDR module products provided by the Company is shown in Table 3.
Table 3 Corresponding Relationship among Test Range, Pulse Width and Sampling Accuracy
|
Test range |
Minimum pulse width |
Maximum pulse width |
Sampling accuracy |
|
1km |
5 |
160 |
0.128 |
|
5km |
10 |
320 |
0.255 |
|
10km |
20 |
640 |
0.51 |
|
25km |
20 |
640 |
1.02 |
|
30km |
40 |
1280 |
1.02 |
|
50km |
80 |
1280 |
2.04 |
|
60km |
80 |
2560 |
2.04 |
|
80km |
80 |
2560 |
4.08 |
|
100km |
80 |
10240 |
4.08 |
|
125km |
80 |
10240 |
4.08 |
|
160km |
80 |
20480 |
8.17 |
|
180km |
80 |
20480 |
8.17 |
|
260km |
80 |
20480 |
16.33 |
|
300km |
80 |
20480 |
16.33 |
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