RECOMMENDATION ITU-R F.1103 - RADIO-RELAY SYSTEMS OPERATING IN BANDS 8 AND 9* FOR THE PROVISION OF ... ANNEX 1 - General characteristics of radio-relay systems operating in bands 8 and 9 for the ... 1. Introduction 2. General description of the systems 3. Frequency considerations 4. Characteristics of the radio equipment 4.1 General 4.2 System characteristics 4.3 Installation and maintenance