Annex 1 RF channel arrangement in the bands 7 125-7 425 MHz and 7 425-7 725 MHz 1 This describes a RF channel arrangement for low, medium and high capacity digital FWSs, operating in the bands 7 125-7 425 MHz and 7 425-7 725 MHz. The RF channel arrangement is shown in Fig. 2 and is derived as follows: Let be the frequency of the centre of the band of frequencies occupied (MHz); f0 be the centre frequency of one RF channel in the half of the band (MHz); fn be the centre frequency of one RF channel in the upper half of the band (MHz), then the frequencies (MHz) of the individual channels, with duplex separation of 154 MHz, are expressed by the following relationships: a) for channel spacing of 28 MHz (Notes 1 and 2): lower half of the band: = 161 + 28 fn f0 n – half of the band: = 7 + 28 f0 – n = 1, 2, 3, 4 and 5. n b) for channel spacing of 14 MHz: lower half of the band: 154 + 14∙n fn = f0 – half of the band: + 14∙n fn′ = f0 where: = 1,2,…, 10; n c) for channel spacing of 7 MHz: lower half of the band: 150.5 + 7∙n fn = f0 – upper half of the band: + 3.5 7∙n + fn′ = f0 = 1,2,…, 20; n d) for channel spacing of 3.5 MHz: lower half of the band: = 148.75 + 3.5∙n fn f0 – half of the band: = + 5.25 + 3.5∙n fn′ f0 where = 1,2,…, 40; n e) for channel spacing of 1.75 MHz: lower half of the band: = 147.875 + 1.75∙n fn f0 – upper half of the band: = + 6.125 + 1.75∙n fn′ f0 where: = 1,2,…, 80. n
Annex 1 RF channel arrangement in the bands 7 125-7 425 MHz and 7 425-7 725 MHz 1 This describes a RF channel arrangement for low, medium and high capacity digital FWSs, operating in the bands 7 125-7 425 MHz and 7 425-7 725 MHz. The RF channel arrangement is shown in Fig. 2 and is derived as follows: Let f0 be the frequency of the centre of the band of frequencies occupied (MHz); fn be the centre frequency of one RF channel in the half of the band (MHz); be the centre frequency of one RF channel in the upper half of the band (MHz), then the frequencies (MHz) of the individual channels, with duplex separation of 154 MHz, are expressed by the following relationships: a) for channel spacing of 28 MHz (Notes 1 and 2): lower half of the band: fn = f0 – 161 + 28 n half of the band: = f0 – 7 + 28 n n = 1, 2, 3, 4 and 5. b) for channel spacing of 14 MHz: lower half of the band: fn = f0 – 154 + 14∙n half of the band: fn′ = f0 + 14∙n where: n = 1,2,…, 10; c) for channel spacing of 7 MHz: lower half of the band: fn = f0 – 150.5 + 7∙n upper half of the band: fn′ = f0 + 3.5 + 7∙n n = 1,2,…, 20; d) for channel spacing of 3.5 MHz: lower half of the band: fn = f0 – 148.75 + 3.5∙n half of the band: fn′ = f0 + 5.25 + 3.5∙n where n = 1,2,…, 40; e) for channel spacing of 1.75 MHz: lower half of the band: fn = f0 – 147.875 + 1.75∙n upper half of the band: fn′ = f0 + 6.125 + 1.75∙n where: n = 1,2,…, 80.
R-REC-F.385-10-201203-I!!MSW-E.docx