upper half of the band: = + 3 647.75 2.5 (N MHz f 'n fr n) – – where: : reference frequency fr = 1, 2, . . ., with 84. n N N ≤ The frequency arrangement with = 11 701 MHz is illustrated in Fig. 4. fr FIGURE 4 Radio-frequency channel arrangement for radio-relay systems operating in the 15 GHz band with 2.5 MHz spacing and N = 84 (All frequencies in MHz) 2 Description of channel arrangements used in Canada with channel spacing of 5, 10, 20, 30, 40 and 50 MHz based on the 2.5 MHz homogeneous pattern referred to in 5 recommends a) The centre frequencies of the 43 paired channels which allow RF channel bandwidths of 5 MHz and less are expressed by the following relationships: Lower half of the band = 14 877.5 5 for = 1 to 11 An n n – = 14 717.5 5 for = 12 to 43 An n n – Upper half of the band = 15 352.5 5 for = 1 to 11 A′n n n – = 15 192.5 5 for = 12 to 43 A′n – n n where is the channel number and and are the centre frequencies in MHz of the n An A′n paired channels. b) The centre frequencies of the 21 paired channels which allow RF channel bandwidths of greater than 5 MHz and less than or equal to 10 MHz are expressed by the following relationships: Lower half of the band = 14 875 10 for = 1 to 5 Bn n n – = 14 715 10 for = 6 to 21 Bn n n – half of the band = 15 350 10 for = 1 to 5 B′n n n – = 15 190 10 for = 6 to 21 B′n – n n is the channel number and and are the centre frequencies in MHz of the paired n Bn B′n channels.
upper half of the band: f 'n = fr + 3 647.75 – 2.5 (N – n) MHz where: fr : reference frequency n = 1, 2, . . ., N with N ≤ 84. The frequency arrangement with fr = 11 701 MHz is illustrated in Fig. 4. FIGURE 4 Radio-frequency channel arrangement for radio-relay systems operating in the 15 GHz band with 2.5 MHz spacing and N = 84 (All frequencies in MHz) 2 Description of channel arrangements used in Canada with channel spacing of 5, 10, 20, 30, 40 and 50 MHz based on the 2.5 MHz homogeneous pattern referred to in recommends 5 a) The centre frequencies of the 43 paired channels which allow RF channel bandwidths of 5 MHz and less are expressed by the following relationships: Lower half of the band An = 14 877.5 – 5 n for n = 1 to 11 An = 14 717.5 – 5 n for n = 12 to 43 Upper half of the band A′n = 15 352.5 – 5 n for n = 1 to 11 A′n = 15 192.5 – 5 n for n = 12 to 43 where n is the channel number and An and A′n are the centre frequencies in MHz of the paired channels. b) The centre frequencies of the 21 paired channels which allow RF channel bandwidths of greater than 5 MHz and less than or equal to 10 MHz are expressed by the following relationships: Lower half of the band Bn = 14 875 – 10 n for n = 1 to 5 Bn = 14 715 – 10 n for n = 6 to 21 half of the band B′n = 15 350 – 10 n for n = 1 to 5 B′n = 15 190 – 10 n for n = 6 to 21 n is the channel number and Bn and B′n are the centre frequencies in MHz of the paired channels.