The GT-SAT GT-QDCIR40 is a Circular Quad LNB with four separate outputs, designed for satellite transmissions using circular polarisation within the 11.70–12.75 GHz frequency range.
The model is primarily used to receive satellites transmitting with right-hand and left-hand circular polarisation, including selected Russian satellite channels and services such as NTV Plus within the satellite’s available coverage area.
Its four outputs operate independently, allowing up to four satellite receivers or tuners to be connected. Each connected receiver can independently select between RHCP and LHCP by changing the supply voltage.
The LNB has a local oscillator frequency of 10.75 GHz, a conversion gain of 56–60 dB and standard 75-ohm F-type outputs.
✅ Product Benefits
- Four separate and independently controlled outputs
- Connects up to four receivers or tuners
- Designed for circularly polarised satellite signals
- Supports both RHCP and LHCP
- Optimised for the upper Ku-band
- Local oscillator frequency of 10.75 GHz
- Conversion gain of 56–60 dB
- Typical cross-polarisation isolation of 25 dB
- Frequency stability of maximum ±1 MHz at room temperature
- Suitable for receivers equipped with twin or multiple tuners
- Suitable for selected Russian satellite channels
- Four 75-ohm F-type outputs
🎯 Ideal For
- Satellites using circular polarisation
- Reception of RHCP and LHCP signals
- Selected Russian satellite channels
- NTV Plus within the available coverage area
- Installations with up to four receivers
- Multiple televisions with satellite tuners
- Receivers equipped with twin tuners
- Homes and holiday properties
- Upgrading from a Circular Single or Twin LNB
- Replacing an existing Circular Quad LNB
🔧 Use and Connection
The LNB is installed on a compatible satellite dish and aligned towards a satellite position using circular polarisation within the specified frequency range.
Its four outputs are connected using separate coaxial cables to up to four receivers or tuners. Each receiver or tuner requires its own direct cable from the LNB for independent operation.
The receiver selects the circular polarisation through the supply voltage:
- RHCP: 11.0–14.0V DC
- LHCP: 16.0–20.0V DC
This is a Circular LNB for circularly polarised signals and should be selected according to the satellite’s transmission system and frequency range.
⚙️ Technical Specifications
Product type: Circular Quad LNB
Model: GT-SAT GT-QDCIR40
Number of outputs: 4 separate outputs
Directly connected receivers/tuners: Up to 4
Polarisation: Circular, RHCP and LHCP
Input frequency: 11.70–12.75 GHz
Output frequency: 750–2000 MHz
Local oscillator frequency: 10.75 GHz
Frequency stability at room temperature: Maximum ±1 MHz
Phase noise at 1 kHz: Maximum −60 dBc/Hz
Phase noise at 10 kHz: Maximum −85 dBc/Hz
Phase noise at 100 kHz: Maximum −105 dBc/Hz
Conversion gain: 56–60 dB
Gain flatness over 26 MHz: ±0.5 dB typical
RHCP control voltage: 11.0–14.0V DC
LHCP control voltage: 16.0–20.0V DC
Cross-polarisation isolation: 25 dB typical
Image rejection: Minimum 40 dB
Power consumption: 190 mA typical
Outputs: 4 × F-type female
Output impedance: 75 Ω
Output spurious level: Below −60 dBm
📦 Package Contents
- 1 × GT-SAT GT-QDCIR40 Circular Quad LNB
