The Marconi-Aeroflex-IFR 2305 Modulation Meter is a high performance, microprocessor controlled modulation meter with a comprehensive specification covering the carrier frequency range of 500kHz to 2GHz. Operation may be either local via the user-friendly front panel or via the IEEE-488 interface. Indication of measured quantities is provided by two LCD 7-segment displays: frequency of either the carrier or of the modulation tone and Modulation in %AM, or radians deviation. Minimum input level of -25 dBm (500kHz to 1GHz) and -18 dBm (1GHz to 2GHz).