The APH power supplies are high voltage automatic crossover (voltage/current) stabilizers which can be set or programmed to any level within their rated range and be fully loaded at any output setting.

Large panel-mounted analog meters allow monitoring of both voltage and current channels. Digital meters are available as an option. Substitute the suffix "DM" for the suffix "M" to specify the digital meter option. Two 10-turn rheostats provide high resolution voltage and current settings. Panel-mounted LEDs indicate voltage- or current-mode operation. This information is simultaneously delivered as an optically isolated, TTL-compatible flag to a rear terminal. A built-in uncommitted amplifier can be used for summing, scaling, and programming by passive resistance. It has both inverting and non-inverting inputs available. Open loop gain of the uncommitted amplifier is in excess of 20,000 volts per volt.

The APH are especially suited for applications requiring low output noise, high stability and programmability.