The Sonoma Instrument 310 is a broadband low-noise preamplifier engineered to enhance receiver and spectrum analyzer sensitivity across the VHF through microwave bands. Operating from 9 kHz to 1 GHz, it delivers 32 ± 1.5 dB gain with exceptional flatness and low noise figure, making it ideal for close-field emission detection and radiated measurement applications.
Technical Specifications
• Frequency Range: 9 kHz to 1 GHz (-3 dB)
• Gain: 32 ± 1.5 dB at 100 MHz
• Gain Flatness: ± 0.5 dB maximum (25 kHz to 800 MHz)
• Noise Figure: 1.8 dB typical (5 MHz to 500 MHz); 2.5 dB maximum (5 MHz to 500 MHz); 2.5 dB typical (1 GHz)
• Equivalent Input Noise Voltage: 0.55 nV/√Hz (5 MHz to 500 MHz); 0.59 nV/√Hz (1 GHz)
• Output at 1 dB Gain Compression: +10 dBm
• Maximum Input for Linear Operation: ±25 mV (-22 dBm)
• Input Damage Level: ±2 V DC; -22 dBm ±25 mV AC ±2 V DC
• Harmonic Distortion: -39 dB typical at 0 dBm output, 200 MHz
• Third Order Intercept Point: +23 dBm typical at 300 MHz
• Impedance: 50 Ω (AC coupled)
• Input Return Loss: 8 dB (20 kHz to 1 GHz)
• Output Return Loss: 10 dB
• Reverse Isolation: 35 dB
• Power Output: 10 mW typical
• Connectors: Type N (female)
– Key Features
• Ultra-low noise performance across the measurement band
• Flat frequency response minimizes correction requirements
• High linearity and IP3 reduce intermodulation artifacts
• AC-coupled input prevents DC offset interference
• 50 Ω impedance throughout for standard RF system integration
– Typical Applications
• Close-field emission probing with 11940A and 11941A probes
• Radiated emission measurement paired with spectrum analyzer and antenna
• Low-level signal detection in receiver systems
• Precision EMI/RFI characterization
– Compatibility & Integration
Designed as a direct replacement for HP/Agilent/Keysight 11909A. Dimensions: 109 mm (H) × 107 mm (W) × 183 mm (D).
