In fiber optic systems, measuring optical power is the most basic, much like a multimeter in electronics. In fiber optic measurement, the optical power meter is a heavy duty common meter. By measuring the absolute power of the transmitter or optical network, an optical power meter can evaluate the performance of the optical equipment . Using an optical power meter in combination with a stable source, it is possible to measure connection loss, verify continuity, and help evaluate fiber link transmission quality. What is an optical power meter? An optical power meter is used to measure absolute optical power or relative loss of optical power through a length of optical fiber. When selecting an optical power meter, the most important technical indicator is the wavelength and range of the test. The unit of optical power is dbm. In the specification of the optical transceiver or switch, there is its illuminating and receiving optical power. Generally, the illuminating light is less than 0 dbm. The minimum optical power that the receiving end can receive is called sensitivity, and the maximum optical power that can be received is subtracted. The unit of sensitivity value is db (dbm-dbm=db), called dynamic range, and the illuminating power minus the receiving sensitivity is the allowable fiber attenuation value. The actual illuminating power at the time of testing minus the value of the actually received optical power. Is the fiber loss (db). The best value of the optical power received at the receiving end is the maximum optical power that can be received - (dynamic range / 2), but generally not so good. Due to the dynamics of each optical transceiver and optical module The range is different, so the specific amount of fiber can allow the attenuation depends on the actual situation. Generally, the allowable attenuation is about 15-30db. Some optical power meter product specifications only have two parameters of luminous power and transmission distance. Sometimes, the transmission distance calculated by the attenuation per kilometer of fiber is mostly 0.5db/km. The minimum transmission distance is divided by 0.5. The maximum optical power that can be received. If the received optical power is higher than this value, the optical transceiver may be burned out. The maximum transmission distance divided by 0.5 is the sensitivity. If the received optical power is lower than this value, the link may be Will not work. There are two ways to connect a fiber: One is a fixed connection, one is an active connection, and the fixed connection is a fusion connection. The special connection is through discharge, and the optical fiber is melted to connect the two optical fibers together. The advantage is that the attenuation is small, and the disadvantage is that the operation is complicated and the flexibility is poor. Through the connector, usually the pigtail is connected to the ODF. The advantage is that * for simple flexibility, the disadvantage is that the attenuation is large. Generally speaking, the attenuation of an active connection is equivalent to one kilometer of fiber. The attenuation of the fiber can be estimated by including fixed and active connections, and the attenuation of the fiber per kilometer is 0.5 db. If the active connection is relatively small, the value can be 0.4 db. Simple fiber does not include active connection, can be reduced to 0.3db, the theoretical value of pure fiber is 0.2db / km; for insurance, in most cases, 0.5 is better. An Outdoor CPE (Customer Premises Equipment) is a client device used in outdoor environments, typically for wireless network connectivity. It is a device used to transmit Internet signals from a service provider to the user's location. Outdoor Cpe,Router 4G Outdoor,4G Router Bridge Cpe,300Mbps Wifi Ap Outdoor 4G Lte Cpe Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommtech.com
Outdoor CPE is commonly used to provide broadband access services, especially in remote areas or places without traditional wired network coverage. It can transmit an Internet connection via wireless signals to the building or area where the user is located. Outdoor CPE is typically a highly protected and durable device designed to handle harsh weather conditions in an outdoor environment.
Outdoor Cpes typically include the following main components:
1. Antenna: Outdoor CPE is usually equipped with a high-gain antenna for receiving and sending wireless signals. These antennas can be designed for different frequency bands and wireless standards.
2. Wireless module: Outdoor CPE usually includes a wireless module to handle the transmission and reception of wireless signals. This module usually supports different wireless standards such as Wi-Fi, LTE, 4G, etc.
3. Router function: Outdoor CPE usually has the function of a router, which can distribute the Internet connection to the device where the user is. It can provide IP address allocation, port forwarding, network security and other functions in the local area network.
4. Power supply and battery: Since Outdoor CPE is usually used in outdoor environments, it usually requires a reliable power supply. Some Outdoor Cpes are also equipped with batteries to provide continuous Internet connectivity in the event of a power outage.
The main features and advantages of Outdoor CPE are as follows:
1. High-speed broadband access: Outdoor CPE can provide high-speed broadband access services through wireless signals, so that users can enjoy high-speed Internet connections in places without traditional wired network coverage.
2. Flexibility: Since Outdoor CPE is a wireless connection, it can be used in different locations and environments. Users can place the Outdoor CPE in the best position as needed for optimal signal coverage and performance.
3. Simple installation: Outdoor CPE usually has a simple installation process, and users only need to place the device outdoors and make some basic Settings to start using the Internet connection.
4. Strong anti-interference ability: Outdoor CPE usually has strong anti-interference ability and can provide stable Internet connection under harsh environmental conditions. It can cope with various sources of interference, such as electromagnetic interference, weather conditions and so on.
5. High reliability: Outdoor CPE usually has a high degree of reliability and durability, and can be operated for a long time in a variety of outdoor environments. It usually has waterproof, dustproof, lightning-proof and other functions to cope with different weather conditions.
Outdoor CPE is widely used in a variety of scenarios, especially in rural areas, mountains, islands and other places without traditional cable network coverage. It can provide high-speed broadband access services to residents and enterprises in these areas, helping them to enjoy the convenience of the Internet.
In summary, the Outdoor CPE is a client device for outdoor environments to provide high-speed broadband access services via wireless signals. It is highly reliable, flexible and anti-jamming, and can provide a stable Internet connection in a variety of outdoor environments. It plays an important role in providing broadband access services, especially in places without traditional wired network coverage.