High-Performance C-Band LNB with 3.7-4.2GHz Input Frequency, 12°K Noise Temperature, and 65dB Conversion Gain

The C-Band Universal Single LNB ST-C11A is a high-performance satellite signal reception component specifically designed for C-band FSS (Fixed Satellite Service) applications. Featuring a 5.15GHz local oscillator design, it downconverts 3.7-4.2GHz satellite signals to 950-1450MHz IF output. It supports both linear (Vertical/Horizontal) and circular (LHCP/RHCP) polarization, adapting to different satellite polarization standards worldwide.

Key Advantages:

• Standard C-Band Coverage – 3.7-4.2GHz input frequency – full C-band FSS spectrum coverage
• Dual Polarization Support – Compatible with both linear and circular polarization – adapts to global satellite standards
• Ultra-Low Noise Temperature – Noise temperature as low as 12°K – excellent weak signal reception
• High Gain Output – 65dB typical gain – sufficient signal strength
• Wide Temperature Reliability – -30℃~+60℃ operating range – adapts to all climates
• Standard Interface – 75Ω F-type output – compatible with mainstream satellite receivers

Standard C-Band Coverage	Dual Polarization Support
Input Frequency: 3.7 ~ 4.2 GHz Full C-band FSS spectrum coverage Output Frequency: 950 ~ 1450 MHz LO Frequency: 5.15 GHz	Supports both polarization types: Linear: Vertical (V) / Horizontal (H) Circular: LHCP / RHCP 13V/18V voltage switching control

Ultra-Low Noise Temperature	High & Stable Gain
Noise Temperature: 12°K Excellent equivalent noise figure Superior weak signal reception capability	Conversion Gain: 65dB (Typ.) Output P1dB: ≥0.0dBm Output VSWR: ≤2.0:1 Stable and sufficient signal strength

Precise Local Oscillator	Wide Temperature Reliability
LO Frequency: 5.15 GHz Frequency Accuracy: ±0.5 MHz Phase Noise: -80dBc/Hz @ 10kHz Reliable signal lock	Operating Temperature: -30℃ ~ +60℃ DC Power: 11~20V / ≤110mA Adapts to all climate conditions

Standard Interface	Plug and Play
Output Interface: F-type (75Ω) Standard coaxial connection Compatible with mainstream satellite receivers	No complex configuration required Install and use immediately Simple and fast installation

Challenge	How This LNB Solves It
Different satellites use different polarization standards – equipment incompatibility	Supports both linear (V/H) and circular (LHCP/RHCP) polarization – one LNB adapts to different satellite standards worldwide.
Weak C-band signals in remote areas – poor picture quality	Noise temperature as low as 12°K – excellent weak signal reception capability for clear picture quality.
Insufficient gain leads to unstable reception	Typical gain 65dB with output VSWR ≤2.0:1 – sufficient signal strength for stable, reliable reception.
Temperature changes outdoors cause signal drift	Wide temperature design (-30℃~+60℃) – adapts to all climates for stable, reliable signal.
Concerned about compatibility with new receivers	Standard 75Ω F-type interface – compatible with the vast majority of satellite receivers on the market.

Application	Description
C-Band FSS Fixed Satellite Services	Broadcast and telecommunications carrier C-band satellite link reception
Home Satellite TV	High-quality C-band satellite television program reception
VSAT Satellite Communications	C-band signal reception component for VSAT terminals
Enterprise Satellite Communications	Enterprise-grade C-band satellite private lines and data backhaul
International Satellite Reception	Adapts to different regional C-band polarization standards – globally compatible

Q: What polarization types does this LNB support?

A: Supports two polarization types:

• Linear: Vertical / Horizontal
• Circular: LHCP (Left-Hand Circular) / RHCP (Right-Hand Circular)

Polarization switching is controlled by the receiver's 13V/18V voltage signals.

Q: What does 12°K noise temperature mean in practice?

A: Noise temperature is a measure of the LNB's self-generated noise. 12°K is an excellent level, equivalent to a noise figure below 0.5dB. This means the LNB generates very little self-noise and can receive very weak satellite signals, ensuring clear picture quality.

Q: Is 65dB gain sufficient for practical use?

A: Absolutely. 65dB is a standard high-gain level for C-band LNBs. For standard C-band FSS applications, this gain ensures sufficient signal strength with output VSWR ≤2.0:1 for stable reception.

Q: Can this LNB receive all C-band channels?

A: Yes. Input frequency covers the 3.7-4.2GHz full C-band FSS spectrum – can receive all C-band satellite programs within this range.

Q: What is the operating temperature range?

A: -30℃ to +60℃ – suitable for most climate conditions, from cold winters to hot summers.

Q: Does installation require professional expertise?

A: No. The standard F-type interface uses standard coaxial cable. However, professional dish alignment is recommended for optimal reception performance.