Telecom systems have usage and prominence in almost every industry to establish a wide and high reliability uninterrupted network of communication. Wide ranges of VSAT (very small aperture terminal) network equipment are responsible for serving the distinctive need of satellite communication for users both at business and home. A part of these systems are low noise block downconverter that receives satellite signal for the end users.
Role of Low-Noise Block Downconverter
Popular with names like low noise converters (LNC) or low noise block downconverter (LNB); they combinesa low-noise amplifier and frequencydown converter together. These are typically mounted at the focal point of Satcom and TVRO antennas and play a crucial role collecting radio waves from the dish. The major functionalities of this downconverter include as below:
• It receives the lowest levels of microwave signals from satellite
• Amplifies the signals
• Transforms the microwave signals to the L Band for feeding to the TV Set Top Box or demodulator
• LNBs cover all Satcom bands
Some of the most popular are –
• C-Band – This type of downconverter has a local oscillator of 5.15 GHz, while its frequency ranges from 3.4 – 4.2 GHz.
• Ku-Band – Being a standard LNB of North America, it contains a 10.75 GHz local oscillator and its frequency varies from 11.7 – 12.2 GHz.
• Dual band – The LNBs of Ku band generally uses two alternatives of local oscillators including 9.75 and 10.6 GHz. It allows you to download frequencies ranging from 10.7 -11.7 GHz.