Place of Origin:
CHINA
Brand Name:
SETON
Certification:
CE, ISO, RoHS
Model Number:
ST-K21WA
Universal Ku-Band LNBF designed for high-performance satellite signal reception and conversion.
| Parameter | Specification |
|---|---|
| Input Frequency Range (Low-Band) | 10.7GHz ~ 11.7GHz |
| Output Frequency Range (Low-Band) | 950MHz ~ 1950MHz |
| Low band LO frequency | 9.75 GHz |
| Input Frequency Range (High-Band) | 11.7GHz ~ 12.75GHz |
| Output Frequency Range (High-Band) | 1100MHz ~ 2150 MHz |
| High band LO frequency | 10.6GHz |
| Noise figure | 0.7dB (Typ.)/ 1.0dB(Max.) |
| LO Initial Accuracy | 0.5MHz |
| LO Temperature Drift (-30~+60℃) | 0.75MHz |
| LO phase noise @ 1 KHz | -75dBc/Hz |
| LO phase noise @ 10 KHz | -80dBc/Hz |
| LO phase noise @ 100 KHz | -90dBc/Hz |
| Conversion Gain | 55dB~65dB/ 60dB (Typ.) |
| Gain Flatness | 3.0dB (Max.) |
| Gain Variation | 0.5dB/26MHz |
| O/P 1dB Compression Point (P1 dB) | 0.0dBm (Min.) |
| Image-Rejection | -40dBc (Min.) |
| Crosstalk Isolation | 20dB (Min.) |
| O/P VSWR | 2.5:1 |
| Control Signals Ca V | 10.0V~14.0V |
| Control Signals Cb H | 16.0V~20.0V |
| Control Signals Cc | 22±4KHz |
| DC-Power | 10~20V/100Vdc*mA (Max.) |
| Output Impedance | 75Ω (F-Type) |
| Working Temperature | -30℃~+60 ℃ |
An LNB (Low Noise Block, also called LNC - Low Noise Converter) is used for broadcast satellite reception. The LNB is typically mounted on the satellite dish and serves to collect and amplify the satellite signal received from the dish, then down-converts the signal to a lower, more manageable IF frequency that can be carried over standard coaxial cabling to the receiver. LNBs are categorized into C-Band, Ku-Band, and Ka-Band according to their operating frequency ranges.
The feedhorn is a component of the LNB that functions as a directional horn. It captures signals reflected from the dish and shields the LNB from receiving extraneous radiation from other sources. These collected signals are then passed from the horn to the electronics within the LNB. Feedhorns are classified into orthogonal feed, offset feed, and elliptical feed types.
A Monoblock LNB design incorporates two independent LNBs in a single housing, enabling reception of signals from two different satellites at slightly different orbital positions using a single dish installation. Switching between satellites is achieved via DiSEqC signals. Monoblock LNBs are primarily available for satellites with fixed spacing (2°, 3°, 4.3°, or 6°) and cover Ku band with single, twin, and quad output configurations.
This LNB type allows connection of multiple set-top boxes (STBs) through a single RG6 cable, providing an energy-efficient, multi-user reception solution. This configuration is sometimes referred to as a stack LNB.
Unicable is a modern method for distributing satellite television signals to multiple receivers (currently supporting up to 32 receivers according to standards EN 50494 & EN 50607).
Unicable 1: Refers to SCR LNB, supporting only static working mode.
Unicable 2: Supports both static and dynamic working modes. The LNB can be designed with separate Universal and Unicable inputs, such as 1 Universal output + 1 Unicable output, or 1 Universal output + 3 Unicable outputs.
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