Optical Node /  Receiver
Manufacturer in China

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Premlink – CATV Optical Node and Optical Receiver

CATV optical node is a photoelectric conversion device whose primary function is to convert the received CATV RF optical signal to an electrical RF signal. 

CATV optical node is critical in the HFC (Hybrid Fiber Coaxial) cable TV system because it ensures that the optical signal is properly received and that the end-user sees a high-quality TV picture. CATV optical nodes are used when combined with an optical transmitter and EDFA. In long-distance signal optical transmission, the optical transmitter provides the optical signal through the EDFA, and the optical cable delivers it to the CATV optical node. 

CATV optical node turns it into RF electrical signals. This conversion is important for ensuring the quality and stability of TV broadcasts, particularly in long-distance transmission or conditions with significant signal attenuation. The final RF signal is sent through coaxial cables to set-top boxes and displayed on televisions.

The difference between a CATV optical node and a CATV optical receiver is that the former is bi-directional (forward and return path), whereas the latter is forward only, with no return path. However, nowadays people have almost no differentiation between optical node and optical receiver. 

Premlink Related CATV Optical Node/Receiver

CATV Optical Node/Receiver Category Sorting

1. Uni-directional and Bi-directional Type

Uni-directional: only has the forward receiving function. 
Uni-directional optical receivers have frequencies of 47~862MHz, 47~1002MHz, and 47~1218MHz. Depending on the frequency division point, there are also frequencies beginning at 54MHz, 65MHz, and 105MHz. 
Bidirectional: The optical node ‘s job is to receive power optical signals in the forward direction and transmit data in the reverse direction. The bi-directional optical node’s frequency is 5~862MHz, 5~1002MHz, 5~1218MHz, or 5~1800MHz (DOCSIS 4.0).  

2. Indoor and Outdoor Type

Indoor: it is not weatherproof. The dust prevention effect is quite weak. 1RU rack-mounted optical receiver is primarily utilized in headend rooms, but they can also be found in buildings and households. 
Outdoor: intended for outdoor or wilderness areas, capable of withstanding tough conditions, with good waterproofing, dustproofing, anti-corrosion, and other characteristics that ensure constant operation even in complicated environments. 

Forward Optical Receiver
High output optical node

3. Based on Different Levels of Output

FTTH: This kind of receiver is compact in size, has a low output level, and only serves one function, which is to receive photoelectric signal. 
FTTB : This kind of receiver is appropriate for buildings, residential units, or building, complexes with high output levels capable of meeting the distribution requirements of a building’s television signals. 
FTTC : This type of receiver is big in size, has sophisticated functions, and has very high output level, allowing it to meet the cable TV needs of the entire community. 

4. Active and Passive Type

Active type refers to typical optical nodes / receivers with a power source.
A passive optical receiver is one that does not require a power supply or power adaptor. This type of receiver is a new device that has appeared in recent years, specifically built for fiber-to-the-home (FTTH), simple to install, and extremely inexpensive. It is mainly used for digital television receiving.

5. Management and Non-Management Function 

The optical node or receiver with management, known as FTTB and FTTC optical nodes or receivers, has built-in network management that allows it to monitor its operating state and change some fundamental parameters.
The optical node / receiver without Management function: it is a standard optical receiver. 

6. Number of Input Optical Paths 

One input optical path: It means that the number of input optical paths is only one. 
2 Input optical path: There are two input optical paths that are the primary input port and the backup input port. When there is a problem with the main path, it automatically switches to the backup path. 

Optical Node

Premlink – High Quality CATV Optical Node/Receiver Manufacturer in China

Works at CATV broadband for over 35 years, offers all kinds of CATV optical node/optical receivers according to customer’s request.

The Advantages of CATV Optical Node/Optical Receiver

 High bandwidth: 
Optical fiber transmission has considerably more bandwidth than typical coaxial cable, which means higher quality TV and quicker Internet connection speeds. 

High anti-interference capability: 
Because fiber optic transmission is not influenced by electromagnetic interference, it can maintain signal stability in complex electromagnetic environments. 

 Long transmission distance: 
Optical fiber has a far longer transmission distance than coaxial cable, which allows for larger cable TV signal coverage. 

Low maintenance costs: 
Fiber optic transmission provides lower loss, which reduces signal attenuation and failure rates, lowering maintenance expenses. 

CATV Optical Node

Something You Should Know about CATV Optical Node

OPTICAL NODE CATV PON
What are the key components of an optical node ?

1. PIN DIODE 
2. Amplification module 
3. Control Circuit 

What are the three key parameters of an optical node ? 

1. Input optical power 
2. Output Level 
3. Non-linearitry performance 

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Trying to source a quality optical receiver at a reasonable price has been an adventure. My experience with the team at Premlink has been fantastic with quick responses to my questions, clear and well written documentation, and fast order dispatch. Thank you.
Douglas
Everything from this Premlink was perfect: the service, the responsiveness, the quality of the product and the finally the support after the purchase. The item itself that I purchased is high quality and working as expected.
Tibor
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