The ENI Mode! 1140LA is an all solid-state amplifier that has a flat frequency response from 9 kHz to 250 MHz with a gain of 55 dB. Its 50Ω input is compatible with any laboratory signal generator, function generator or integrated circuit oscillator. Input and output impedances are 50Ω and the unit may be driven to full power output by most RF synthesizers, signal generators and swept signal sources. Output power from zero to more than 1500 W is continuously adjustable by varying the amplitude of the low-level input. Any load impedance (from an open to a short circuit) may be connected to the output of the 1140LA without fear of damage or oscillation. The unit provides maximum power transfer to a 50Ω load impedance; however, any load impedance between 40 to 60Ω can be driven with no reduction in power output. Gain is 55 dB nominal with variation of less than ±1.0 dB over the entire frequency range. It provides at least 600 W of saturated power from 4 kHz to 400 kHz. A built-in, true-average power meter measures both the power leaving the 1140LA (forward power) and the power absorbed by the load (load power). Extraordinary meter accuracy is provided by a unique computer circuit in the output. By adjusting the tuning (or frequency of the load) and observing the increase in load power, optimum match can be readily achieved. Complete with built-in power supply and cooling system, the 1140LA will operate from any 115 VAC line with a 35 A capacity. The 1140LA will deliver its rated power output into any load impedance regardless of match (up to 400 W of reflected power). Output RF voltage is displayed on the front panel meter. The 1140LA is packaged for bench mounting and is shipped with rack-mounting adaptors. The 1140LA will raise the power level of signal sources and generators without requiring tuning or bandswitching.