The SMW Microwave Ku-Band Q-PLL LNB Type R (Part Number: 136128-2 REV D1) is a professional-grade Low-Noise Block downconverter designed for high-performance satellite communication (SATCOM) systems. Manufactured by Swedish Microwave AB, a leader in RF technology, this LNB delivers exceptional frequency stability and signal integrity required for demanding applications, including maritime VSAT, SNG (Satellite News Gathering), and broadcast reception .
This model, identified by the part number 136128-2, is a critical component integrated into advanced satellite antenna systems for reliable Ku-band signal reception .
Key Features & Technology
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Advanced Q-PLL Technology: The “Q-PLL” (Quadrature Phase-Locked Loop) design ensures ultra-stable local oscillator (LO) performance. This translates to exceptionally low phase noise, minimizing signal errors and making it ideal for receiving low symbol rate carriers and complex DVB-S2X waveforms .
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Ku-Band Frequency Coverage: The LNB operates across the full Ku-band spectrum (10.70 – 12.75 GHz), converting incoming satellite signals to a lower intermediate frequency (IF) in the 950 – 2150 MHz range for processing by a satellite modem or receiver .
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Quad LO Capability: This “Quad LO” model supports up to four internal Local Oscillator frequencies (e.g., 9.75, 10.00, 10.75, and 11.30 GHz). This allows for versatile band switching and reception of multiple satellite transponders and polarizations .
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Exceptional Stability: Features an internal high-stability reference (typically ±2.5 ppm) with the option for an external 10 MHz reference input. The auto-fallback function ensures continued operation even if the external reference is lost, providing a redundant and robust signal chain .
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Professional-Grade Performance: Delivers high linearity, typically featuring an output P1dB of +15 dBm and an Output IP3 of +25 dBm. This ensures reliable performance even in environments with strong adjacent signals, preventing interference and signal distortion .
Technical Specifications
| Specification | Detail |
|---|---|
| Manufacturer | SMW |
| Product Type | Ku-Band PLL LNB (Type R) |
| Part Number | 136128-2 |
| RF Input Frequency | 10.70 – 12.75 GHz (Full Ku-Band) |
| IF Output Frequency | 950 – 2150 MHz |
| LO Stability | ±2.5 ppm (Internal Reference) |
| Phase Noise (Typ.) | -82 dBc/Hz @ 1 kHz / -95 dBc/Hz @ 100 kHz |
| Noise Figure | 0.8 dB typical (1.0 dB max) |
| Gain | 60 dB typical |
| DC Power | +12 to +24V DC |
| Output Connector | Type N (50 Ohm) |
| Application | Marine, VSAT, SNG, Broadcast, Mobile |
Applications
The SMW Q-PLL Type R LNB is engineered for professional environments where signal quality cannot be compromised. Typical applications include:
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Maritime VSAT: Provides stable connectivity for vessels at sea .
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SNG & Broadcast: Essential for reliable, high-quality uplink/downlink for news and event broadcasting .
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Remote Monitoring & Control: Supports optional M&C via Modbus RS485 for alarm monitoring and remote band switching .
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Rugged Environments: Built with a wide operating temperature range (-40°C to +80°C) to withstand harsh conditions
