352

The Sonoma Instrument 352 is a broadband preamplifier covering 10 kHz to 5 GHz (-3 dB), designed for EMI measurements, antenna signal amplification, and general-purpose RF signal amplification applications requiring wide frequency coverage into the microwave range. With a gain of 26 ±1.5 dB at 2.5 GHz and gain flatness of ±0.6 dB from 500 kHz to 4 GHz, it delivers consistent and predictable amplitude performance across a frequency range that extends 2 GHz beyond the Sonoma 330 and 317 — making it the natural choice when coverage through 5 GHz is required in a single instrument.

Key specifications include a noise figure of 6 dB typical from 10 MHz to 2.5 GHz, an output at 1 dB gain compression of +10 dBm from 10 MHz to 4 GHz, harmonic distortion of -44 dB at 0 dBm output at 300 MHz, and a third order intercept point of +26 dBm at 300 MHz. Input return loss is 12 dB and output return loss is 10 dB, both from 10 MHz to 5 GHz. Reverse isolation is 37 dB from 10 MHz to 5 GHz. The equivalent input noise voltage is 0.9 nV/√Hz including 0.45 nV/√Hz from a 50 Ω source. The maximum input for linear operation is approximately ±50 mV, with a notably robust input damage level of ±1V DC, 0 dBm RF, and ±150 mV pulse. The unit is AC coupled with 50 Ω impedance and uses Type N connectors at both input and output.

Time domain performance includes a typical rise time of 70 psec and group delay variation of ±60 psec from 45 MHz to 5 GHz. The unit is mains-powered at 100, 120, 220, or 240V AC / 50–60 Hz at 20 VA. Operating temperature range is 0 to +55°C. Physical dimensions are 91 × 109 × 183 mm (H × W × D) — identical in form factor to all other Sonoma 3XX series amplifiers — with a net weight of 1.5 kg.