The 1587 DC Amplifier is for use in the 1581 Antenna Pattern Recorder. Accepts differential input from 0.1 to 10 V full scale. Provides an analog DC output of +10 V full scale. Attenuation of 20 dB variable, 40 dB maximum in 20 dB steps. Features indicator lights for incorrect polarity and signal overload. Price for DC Amplifier only.