2. The Data Inputs Screen provides controls for the major point-to-point circuit values. You can select a new receive location using the ACE-HF database from this panel, specify transmit station power, and select from several azimuths for each terminal. The antenna selections are a powerful new feature of ACE-HF PRO Version 2. You may now select from an unlimited number of antennas for both ends of each circuit, for circuit groups and for area coverage predictions. You may add your own antenna models or select from numerous antenna models, including sample antenna arrays. Azimuths may be pointed along the great-circle path, or may be individually set at each end of the circuit. Other circuit parameters including Smoothed Sunspot Number, Month, Service Type, Man-made Noise Level and Required Circuit Reliability may be specified here, and you can specify whether the propagation prediction is made for the Short or Long path. The program automatically computes path distance and azimuths for each selected circuit, and computes the equivalent solar flux level for the specified sunspot number. All specified parameters are shown in the Circuit Comment line. You may retrieve new SSN values from the Internet from within the program, and you may compute magnetic declination and magnetic azimuth for each end of a circuit. Once a circuit is specified, it's characteristics may be saved in a special file that may then be recalled at will. Favorite circuits may thus be accumulated for future use.