Place of Origin:
CHINA
Brand Name:
SETON
Certification:
CE, ISO, RoHS
Model Number:
ST-K21WD
| Input Frequency Range (Low-Band) | 10.7GHz ~ 11.7GHz |
| Output Frequency Range (Low-Band) | 950MHz ~ 1950MHz |
| Low band LO frequency | 9.75GHz |
| Input Frequency Range (High-Band) | 11.7GHz ~ 12.75GHz |
| Output Frequency Range (High-Band) | 1100MHz ~ 2150MHz |
| High band LO frequency | 10.6GHz |
| Noise figure | 0.5dB (Typ.)/ 0.8dB(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 | 58dB~70dB/ 64dB (Typ.) |
| Gain Flatness | ±3.0dB (Max.) |
| Gain Variation | 0.5dB/26 MHz |
| 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) |
| Waterproof | O-RING |
| Working Temperature | -30℃~+60℃ |
An LNB (Low Noise Block, also called LNC - Low Noise Converter) is used for communications satellite reception. The LNB is typically mounted on the satellite dish to collect and amplify the satellite signal, then downconvert it to a 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 frequency range.
The feedhorn is a directional component of the LNB that captures signals reflected from the dish while shielding against extraneous radiation. These collected signals are then passed to the LNB's internal electronics. Feedhorns are divided into orthogonal feed, offset feed, and elliptical feed types.
A Monoblock LNB contains two independent LNBs in a single housing, enabling reception from two different satellites at slightly different orbital positions using a single dish. Switching between satellites is achieved via DiSEqC signals. These are primarily available for satellites with fixed 2°/3°/4.3° or 6° spacing, covering Ku band with single, twin, or quad outputs.
This LNB type can connect multiple set-top boxes (STBs) using a single RG6 cable, providing an energy-efficient, multi-user reception mode. It's sometimes referred to as a stack LNB.
Unicable is a satellite TV distribution method supporting multiple receivers (up to 32 per standards EN 50494 & EN 50607). Unicable 1 (SCR LNB) operates in static mode only, while Unicable 2 supports both static and dynamic modes. LNBs can be designed with separate Universal and Unicable inputs (e.g., 1 Universal + 1 Unicable output or 1 Universal + 3 Unicable outputs).
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