The Model 5205A Precision Power Amplifier is a dc coupled, broad band inverting amplifier with a set gain of 100. The 5205 A may be used in combination with the 5200A AC Calibrator for a combined output ranging from 100 (100.000) to 1100 (1100.000) volts rms at frequencies up to 100 kHz. When the 5205A is operating as an independent amplifier ac voltages from 0V to 1100V rms at currents up to 200 mA rms may be obtained. The waveforms may vary from a large amplitude sinusoidal to complex waveforms of DC, however, peak voltage specifications limit the output to 1500 volts. DC voltages from zero to 1500 volts may be obtained at current levels of 100 mA 1-3. Control of the 5205 A can be exercised either manually from the front panel controls or by remote programming. Remote connectors for the 5200A and a customer supplied control source are provided on the rear panel. Connection of the Model 5200A AC Calibrator with the supplied factory cable provides all the analog signal and remote programming data required. 1-4. The amplifier output cable and the input for independent operations are installed on the front panel. Both may be installed on the rear panel for system operations if desired as option —07. The standard output cable is a permanently attached, three foot long, four wire, low capacitance cable which allows remote sensing, high output current and high frequency operation. 1-5. Equipment protection is provided by the Fault and the Overload circuits. Activating the fault circuit automatically reverts the unit to the Standby mode and removes any voltage present from the output. Faults can originate from procedureal errors or equipment failure. A fault due to procedural error can be removed by resetting the systems and performing the restarting procedure. An overload error can be corrected by removing the overload from the circuit. Return to operate will occur automatically when the overload is removed, unless the overload is accompanied by a fault. In this case, power must be removed and restored to remove the indications.