BKTEL

　　Bktel was founded in 1997 and is headquartered in Germany with branch offices in Japan. As a system supplier, BKtel has been providing customers with complete signal transmission and solutions for fiber to the home (FTTH), video coverage, RFoG and HFC broadband networks for more than 20 years. BKtel is also a professional manufacturer of 1550 externally modulated optical transmitters. The company is famous for producing highly reliable optical transmitters. BKtel originally belonged to the CATV department of Alcatel. It mainly produced transmitters for Alcatel. Since January 1998, the department was separated from Alcatel and became BKtel. In addition to continuing to provide transmitters for Alcatel, it began to provide OEM transmissions for other companies. machine. The comprehensive performance index of BKtels transmitter has reached the highest international level. All the transmitters provided by the company meet the standards of the telecommunications industry, and in particular have passed the tests of Deutsche Telekom, which is known for its strict rigor. SBS (Simulated Brillouin Scattering) controls the microwave source to be highly stable, ensuring that the clutter signal after system modulation can be ignored. BKtels optical transmitter ensures that the spurious signals of all channels are less than -65dBc. This indicator can only be observed when the transmitter and optical fiber are connected together for measurement. Strong clutter signals will affect the two important indicators of the system, CSO and CTB. A space with a height of 1U, of which 1U is used to seal all devices that are easily contaminated, and an external heat sink is used to dissipate heat. At the same time, a fan is used to dissipate the heat of the heat sink through the air guide nest to make the core components of the transmitter Being in a constant temperature environment improves the long-term stability of the system. Using heat sink and fan to dissipate heat, the heat dissipation capacity is dozens of times higher than that of a 1U machine directly through the heat sink.

　　BKtel’s optical transmitters can provide hot-pluggable power supplies. Two power modules, 220VAC, -48VDC, and +24VDC, can be selected according to different user conditions to avoid system downtime caused by power damage. For the XL ultra-long-distance transmitter, the software and authorization provided by the manufacturer can be used to adjust the SBS threshold according to the different transmission distance on site. This is very convenient and useful for engineering designers. The transmitter has an automatic level control (ALC) function to achieve automatic gain control (AGC) and automatic slope control (ASC) to the signal to ensure the stable operation of the entire network. The system indicators given are all optical transmitters. According to the indicators under the worst channel under the PAL-D channel setting, the overall system indicators are higher than those given. In the PAL-D system, the carrier-to-noise ratio of the transmitter link can also be as high as 54dB when receiving 0dBm. BKtels optical transmitters can provide various hot-pluggable power supplies. Two power modules, 220VAC, -48VDC, and +24VDC, can be selected according to different user conditions to avoid system downtime caused by power damage. For the XL ultra-long-distance transmitter, the software and authorization provided by the manufacturer can be used to adjust the SBS threshold according to the different transmission distance on site. This is very convenient and useful for engineering designers. The transmitter has an automatic level control (ALC) function to achieve automatic gain control (AGC) and automatic slope control (ASC) for the signal, ensuring the stable operation of the entire network. The system indicators given are all optical transmitters. According to the indicators under the worst channel under the PAL-D channel setting, the overall system indicators are higher than those given. In the PAL-D system, the carrier-to-noise ratio of the transmitter link can also be as high as 54dB when receiving 0dBm. Provide PC network monitoring and service interface (RS485, RS232) and software for monitoring various performance indicators of the transmitter, detailed information that can be monitored, such as temperature range, laser bias current, laser cooling current and power output range, etc. . The working temperature is -10~+50℃, which meets most of the harshest environment requirements in China.

　　BKtel has a history of more than ten years in HFC. It can be said that BKtel is the world’s earliest invented standard case of wireless optical transmission technology. At present, many companies also produce the same products, but because of the long history of BKtel, there are advanced The technology keeps it in an advanced position in the industry. BKtel has achieved great success in Europe and has a very large project in Telefónica, which was completed by BKtel. In 2004, BKtel won a 25 million contract from Deutsche Telekom, mainly for HFC systems. BKtel in China has a history of eight years, and the products of German BKtel in the Chinese market are also famous for its mature technology and advanced level. Its goal is to provide Chinese users with the most advanced products in this field.

　　Currently, Bktel provides three types of products. Different models have differences in SBS suppression, optical output power and the typical laser linewidth that determines the noise index in long-distance transmission. The optical transmitters all use a 19-inch 1U standard chassis, and are equipped with an RF input interface, an RF detection port and a dual optical output port on the rear panel. These interfaces can also be optionally installed on the front panel.

　　Take the lead in the Ethernet network monitoring function, each machine has an independent IP address to meet the needs of network management. The production process is excellent, and the optical devices and electronic components are sealed in a sealed package. Unique heat dissipation design to ensure high performance, high reliability, stable operation and extended life of the system

　　BK-ES10XLa-85/100-190: extremely narrow laser linewidth (0.3MHz); SBS threshold is continuously adjustable between +13～+19dBm; output power 2×8.5/2×10dBm; ITU-T standard wavelength, Adjustment range +/-100GHz; provide 10/100 Ethernet interface, support SNMP and WEB web browser, provide download and update for web server and transmitter driver software to realize future functional operation.

　　BK-ES10Lb-70-190: narrow laser linewidth (0.65MHz); SBS threshold is continuously adjustable between +13～+19dBm; output power is 2×7dBm; provides RS485 and RS232 interfaces for EMS (unit management system) ) And local settings.

　　BK-ES10Lb-70-165: narrow laser linewidth (0.65MHz); fixed SBS threshold +16.5; output power 2×7dBm; provide RS485 and RS232 interfaces for EMS (unit management system) and local settings.