The Model 15S5G7 is a solid state, self-contained, air-cooled, broadband amplifier designed for applications where instantaneous bandwidth and high gain are required. Housed in a stylish contemporary cabinet, the unit is designed for bench top use, but can be removed from the cabinet for immediate equipment rack mounting. The 15S5G7, when used with a sweep generator, will provide a minimum of 15 watts of RF power. Included is a front panel gain control that permits the operator to conveniently set the desired output level. The 15S5G7 is protected from RF input overdrive by an RF input leveling circuit that controls the RF input level to the RF amplifier first stage when the RF input level is increased above 0 dBm. The RF amplifier stages are protected from over temperature by removing the DC voltage to them if an over temperature condition occurs due to cooling blockage or fan failure. There is a digital display on the front panel to indicate the operate status and fault conditions when an overtemperature or power supply fault has occurred. The unit can be returned to operate when the condition has been cleared. The 15S5G7 includes digital controls for both local and remote control of the amplifier. This 8-bit RISC microprocessor controlled board provides both IEEE- 488 (GPIB) and asynchronous, full duplex RS-232 control of all amplifier functions.