RECOMMENDATION ITU-R BS.639 - Necessary bandwidth of emission in LF, MF and HF broadcasting
ANNEX 1 - Necessary bandwidth of emission in LF, MF, and HF sound broadcasting
1 Introduction
2 Necessary bandwidth of emission
    2.1 Bands 5 (LF) and 6 (MF)
    2.2 Band 7 (HF)
3 General considerations
4 Relationship between AF bandwidth, RF protection ratio and channel spacing
    4.1 Measurement results
    4.2 Computation results
    4.3 Listening tests
5 Radio-frequency and intermediate-frequency passband characteristics of current types of receiver
6 Use of bandwidth limitation in operational practice
7 A bandwidth-saving overtone transmission and reception system
8 Out-of-band spectrum of double-sideband sound-broadcasting emissions
9 The effect of audio signal processing on bandwidth
10 Conclusions