RECOMMENDATION ITU-R F.756* - TDMA POINT-TO-MULTIPOINT SYSTEMS USED AS RADIO CONCENTRATORS ANNEX 1 - TDMA point-to-multipoint systems used as radio concentrators 1. Introduction 2. General description 3. Principles of operation 4. Frequency, interference and modulation considerations 4.1 Frequency planning 4.2 Spectrum shaping and adjacent-channel interference 4.3 Modulation techniques 4.4 Frequency plans 4.5 Interference 5. System economy and spectral efficiency 5.1 General 5.2 Considerations for data transmission 6. Type of path and characteristics of the radio equipment 6.1 General 6.2 Frequency stability 6.3 Antennas 6.4 Signalling 6.5 Power supply 7. Installation 8. Maintenance 9. Performance and availability objectives for telephony provided by VHF and UHF local ...