Amplifier Research 25S1G4A - High-Performance Broadband Amplifier
The Amplifier Research 25S1G4A is a sophisticated solid state, self-contained, air-cooled broadband amplifier designed to meet the demanding requirements of instantaneous bandwidth, exceptional gain, and linearity. With its modern design, this versatile unit is optimized for benchtop use but can also be easily mounted in a standard equipment rack, offering flexibility in various laboratory settings.
Key Features:
- Rated Power Output: 25 watts minimum
- Input for Rated Output: 1.0 milliwatt maximum
- Power Output @ 3dB Compression:
- Power Output @ 1dB Compression:
- Frequency Response: 0.8 – 4.2 GHz instantaneously
- Gain: 44 dB minimum at maximum setting, with continuous range adjustment of 10 dB minimum (4096 remote steps available)
- Input/Output Impedance: 50 ohms with maximum VSWR of 2.0:1
- Mismatch Tolerance: Operates at 100% of rated power without foldback, ensuring reliability even with variable source and load impedances.
- Modulation Capability: Accurately reproduces AM, FM, or pulse modulation, making it an essential tool for communication testing.
- Phase Linearity: ± 1.0 degrees/100 MHz (typical), ensuring precise signal fidelity.
- Cooling: Equipped with self-contained forced air cooling fans, ensuring optimal operating temperatures.
Advanced Protection and Control:
The 25S1G4A features an RF input leveling circuit that protects against overdrive by managing the RF input to its first stage amplifier. Additionally, over-temperature conditions trigger an automatic disconnection of DC voltage to the RF amplifier stages, safeguarding the device against cooling failures. A digital display on the front panel provides real-time operating status and alerts for any fault conditions, allowing for prompt action to restore functionality.
Remote Interface and Connectivity:
This amplifier is equipped with multiple remote control options, including:
- IEEE-488 (GPIB): 24-pin female connector
- RS-232: 9-pin subminiature D (female connector)
Safety is enhanced with a safety interlock mechanism accessible via a 15-pin subminiature D connector.
Specifications:
- Flatness: ±1.5 dB typical / ±2.0 dB maximum
- Harmonic Distortion: -20 dBc maximum at 20 watts
- Spurious Signals: -73 dBc typical
- Primary Power: Automatic selection of 90-132 VAC or 180-264 VAC at 50/60 Hz, single phase, consuming up to 340 watts maximum.
The Amplifier Research 25S1G4A is the ideal solution for applications in wireless and communication system testing, EMC tests, and other scenarios where clean, linear amplification is required. Its exceptional spurious signal performance and wide frequency range make it a valuable asset for any modern testing environment.
