The Invacom QDF-031 is a professional Universal Quad LNB with a C120 flange and four separate outputs. It is designed for satellite systems where high reception quality, low noise and stable performance are particularly important.
The LNB allows up to four satellite receivers or tuners to be connected directly. Each output operates independently, enabling the connected receivers to select different channels, frequency bands and polarisations simultaneously.
The QDF-031 has a specified noise figure of 0.3 dB, a gain of 50–60 dB and covers the complete Ku-band from 10.70 to 12.75 GHz. It is particularly suitable for larger, motorised or prime-focus satellite dishes where the LNB is combined with a suitable C120 feedhorn.
This is a flange-mounted LNB and does not have an integrated standard feed with a 40 mm mounting neck.
✅ Product Benefits
- Four separate and independently controlled outputs
- Connects up to four receivers or tuners
- Professional Quad Digital Feed construction
- Low specified noise figure of 0.3 dB
- Gain of 50–60 dB
- Covers the complete Ku-band
- C120 flange for connection to a suitable feedhorn
- Suitable for prime-focus and motorised satellite dishes
- Independent selection of channels, frequency bands and polarisation
- Suitable for receivers equipped with twin or multiple tuners
- High polarisation isolation
- Robust construction for demanding satellite installations
🎯 Ideal For
- Professional satellite installations
- Prime-focus satellite dishes
- Larger satellite dishes
- Motorised satellite systems
- Satellite dishes with a separate C120 feedhorn
- Installations with up to four receivers
- Multiple televisions with satellite tuners
- Receivers equipped with twin or multiple tuners
- Areas with weaker satellite signals
- Replacing an existing C120 Quad LNB
🔧 Use and Connection
The Invacom QDF-031 is installed on a compatible feedhorn with a C120 flange. The feedhorn and satellite dish must be correctly matched to provide suitable reflector illumination and optimum reception.
Its four outputs are connected using separate coaxial cables to up to four satellite receivers or tuners. Each receiver or tuner requires its own direct cable from the LNB for complete and independent operation.
A receiver equipped with two tuners will normally use two outputs when both tuners need to operate simultaneously, for example when recording one channel while watching another.
⚙️ Technical Specifications
Product type: Universal Quad LNB with flange connection
Model: Invacom QDF-031
LNB design: Quad Digital Feed
Number of outputs: 4 separate outputs
Directly connected receivers/tuners: Up to 4
Input frequency: 10.70–12.75 GHz
Output frequency: 950–2150 MHz
Noise figure: 0.3 dB
Gain: 50–60 dB
Polarisation isolation: 30 dB
Image rejection: More than 40 dB
Power consumption: 105 mA
Flange connection: C120
Output connections: 4 × F-type female
Output impedance: 75 Ω
Mounting system: C120 flange, not a standard 40 mm mounting neck
📦 Package Contents
- 1 × Invacom QDF-031 Quad LNB with C120 flange
