SMW KU-BAND Q-PLL LNB TYPE J SEATEL PN: 128740 SN-1287401109030

The SMW Ku-Band Q-PLL LNB (Type J), Part Number 128740, is a professional-grade, Quad-PLL (Phase-Locked Loop) Low-Noise Block Downconverter designed specifically for demanding mobile satellite applications, primarily maritime VSAT (Very Small Aperture Terminal). It is engineered to replace and interoperate with industry-standard LNBs like the Norsat 7505H-QPI, providing exceptional frequency stability, low phase noise, and superior resistance to signal degradation caused by vessel motion, vibration, and temperature extremes.

This unit is a cornerstone for stable, high-throughput satellite communication, enabling crew welfare, operational data transfer, and real-time navigation updates anywhere on the globe.

Key Technical Specifications & Features

• Frequency Range: Covers the full Ku-Band spectrum for flexible satellite network access.
• Critical Technology: Quad Phase-Locked Loop (Q-PLL). This advanced circuit design provides unmatched frequency stability (±5 kHz typical), which is absolutely essential for modern, high-order modulation schemes (e.g., 16APSK, 32APSK) used in high-speed data VSATs. It eliminates frequency drift.
• Low Phase Noise: Essential for maintaining clear signal integrity and maximizing data throughput.
• Low Noise Figure: Ensures excellent signal sensitivity to maintain link reliability in marginal conditions.
• Local Oscillator Stability: High-stability internal oscillator designed to withstand the shocks, vibrations, and temperature cycles encountered in marine operations.
• Compatibility: Designed as a direct performance replacement for Seatel/Norsat 7505H-QPI and similar externally referenced PLL LNBs used in stabilized marine antenna systems (e.g., Seatel, Intellian, KVH).
• Model Designation: “TYPE J” indicates the specific mechanical and electrical interface format for integration into Seatel-branded radomes and antenna feeds.
• Input Connector: Standard WR-75 Waveguide interface.
• Output Connector: Type-F Female for coaxial cable connection to the below-decks BUC (Block Upconverter) and modem.

Applications & Use Cases

• Maritime VSAT Communication: The primary application for broadband at sea on commercial vessels, cruise ships, offshore rigs, and superyachts.
• Stabilized Antenna Systems: Directly compatible with major marine stabilized antenna brands that utilize the “Type J” LNB form factor.
• High-Speed Data, VoIP, & Video: Enables reliable crew internet, video conferencing, real-time monitoring, and offshore operational support.

Why Choose This SMW Q-PLL LNB?

• Guaranteed Link Stability: The Q-PLL technology is critical for preventing data packet loss and maintaining a stable connection while the vessel is in motion.
• Proven Marine Durability: Built to endure salt spray, humidity, and wide temperature ranges.
• Direct Replacement: Simplify your maintenance and supply chain. This P/N 128740 is a known, reliable substitute for common OEM part numbers.
• Optimized for Performance: Maximizes the efficiency and data rate potential of your existing maritime VSAT installation.

Product Identifiers:

• Manufacturer: SMW
• Part Number: 128740
• Serial Number Format: 1287401109030 (SN-1287401109030)
• Type: Ku-Band Q-PLL LNB, Type J
• Compatible Reference: Seatel / Norsat 7505H-QPI