L-band satellite/ground station front-ends, test and measurement, remote weak-signal reception, spectrum monitoring, and link gain shaping.
Core Function
Integrates a low-noise amplifier (LNA) and downconverter to convert 1.2–1.3 GHz RF signals to a 20–120 MHz IF.
Key Specs
• Conversion Gain: ≥ 45 dB (adjustable in 1 dB steps over a 30 dB range) • Remote Control: RS232 / RS422 / RS485 • RF Connector: SMA-K (50 Ω)
Design
Compact and easy to integrate.
📊 Key Specifications
Item
Parameter
Input frequency
1.2–1.3 GHz (1200–1300 MHz)
Output IF
20–120 MHz
Conversion gain
≥ 45 dB
Gain adjustability
30 dB range, 1 dB step
Gain stability
0.2 dB / 10 minutes
Noise figure
2 dB (typical)
Input power range
–38 ~ –68 dBm
Output P1dB
≥ +17 dBm
Control interface
RS232 / RS422 / RS485
RF connectors
SMA-K (50 Ω)
✨ Features
Feature
Description
High gain with low noise
Maintains ≥ 45 dB conversion gain while keeping the noise figure as low as 2 dB, increasing weak-signal link margin.
Fine gain control
1 dB step, 30 dB range for system-level gain shaping and dynamic range optimization.
Industrial-grade stability
0.2 dB / 10 minutes gain stability for long-term, continuous operation and stability-sensitive applications.
Wide input tolerance
Accepts –38 ~ –68 dBm input range, compatible with various front-end attenuator/amplifier configurations.
Strong drive capability
Output P1dB ≥ +17 dBm to drive subsequent stages or long cable runs.
Multi-interface remote management
RS232 / RS422 / RS485 options for easy integration with network management, monitoring, and automated test systems.
⚙️ Applications & Setup
Category
Details
Typical Applications
• L-band satellite/ground station front ends • Remote weak-signal reception • Spectrum monitoring and analysis • Link budget optimization • AGC/ALC preamplifier stages
Interface & Power
• RF Ports: SMA-K (50 Ω) • Control: RS232/RS422/RS485 via shielded twisted pair (STP) with proper grounding. • Power: Refer to the equipment nameplate/communication protocol. A host controller or PC is required for remote adjustment and status readback.
Setup & Debugging
Gain setting: Adjust IF gain so the overall link operates in the linear region, then fine-tune in 1 dB steps to balance C/N and distortion. Input level: Keep the front-end signal within –38 ~ –68 dBm to avoid distortion; add/remove attenuation as needed. Cabling: Use low-loss 50 Ω coaxial cables and keep them as short as possible; ensure connectors are tightened and weatherproofed. Control: Use RS232/RS422/RS485 to read status and alarms; configure communication parameters (address, baud rate, parity) per the manual.
