A low-noise block downconverter (LNB) is the receiving device mounted on satellite dishes used for satellite TV reception, which collects the radio waves from the dish and converts them to a signal which is sent through a cable to the receiver inside the building.

An LNB has two important functions: it’s a low-noise amplifier, meaning that it takes the extremely weak satellite signal and amplifies it. It’s also a block downconverter, meaning it takes the signals on the super-high satellite frequencies and converts them to lower frequencies.

An LNB, or Low Noise Block downconverter, is a the small box on an arm that points toward the center of a satellite dish. It receives the signal and sends it to the satellite receiver box that connects to your television.

An LNB (Low Noise Block aka LNC- Low Noise Converter) is used for communications (broadcast) satellite reception. The LNB is usually affixed either in or on the satellite dish. The LNB’s purpose is to utilize the super heterodyne effect and amplify and convert a wide block (band) of frequencies.

LNB又叫高频头（Low Noise Block），即低噪声下变频器，其功能是将由馈源传送的卫星信号经过放大和下变频，把Ku或C波段信号变成L波段，经同轴电缆传送给卫星接收机。

2022年7月27日 · LNB内部结构 由4个单元组成：低噪声前端放大、极化信号切换、再放大后送入本振电路混频、两级中频放大输出信号. LNB图例： 一般采用5150MHz、5750MHz两个本振频率对H、V极化信号作分开处理，在3．6～4．2GHz范围内的两个极化信号就被分别变频为950～1550MHz和1550～2150MHz内互不重叠的中频频率，从而实现共用一根馈线中传送，配合接收机可同时接收到两个极化的信号。 常见的有9.75/10.60GHz或9.75／10.75GHz两个本振频 …

A key component in your satellite TV system is the satellite LNB [Low-Noise Block Downconverter]. The LNB is a critical component in the satellite reception system as it is responsible for amplifying the signal received at your dish.

2017年7月24日 · LNB（Low Noise Block down-converter），低噪声下变频器。 悬架于“锅”表面上方。 用于接收锅面反射的卫星信号。 其功能是将由馈源传送的卫星信号经过放大和下变频，把Ku或C波段信号频谱搬移到L波段。 然后经同轴电缆传送给卫星信号接收机（如DVBS 机顶盒，电视等）。 因卫星讯号在抵达天线（锅）前已相当微弱及同轴电缆传输的频率越高讯号损耗越大，所以才需要LNB来做改善（低噪放大）。 LNB的工作流程，先将卫星高频讯号放大至数十万倍， …

A low noise block downconverter (LNB) is a small box mounted behind a satellite dish. It receives a satellite signal, amplifies it, and down-converts it to an intermediate frequency (IF) more suited to a modem or receiver.

Agilis ODU 控制单元 (ACU) 是一种高性能、高性价比VSAT 设备设计用于卫星通信，具有适用于电话和高速数据通信的高速传输能力。 ACU 可以使用不同的调制格式，如 BPSK、QPSK 和 FM。 它适用于单载波每信道 (SCPC)、每信道多载波 (MCPC)、按需分配多址 (DAMA) 和时分多址 …