Here are the CM4248a / CM3023 graphs on the unmodified, as from the factory, antenna:
Raw Gain:
SWR:
NEC file:
Raw Gain:
SWR:
NEC file:
Code:
CM CM4248 : Channel Master 4248, converted with 4nec2 on 10-Jul-08 2:25
CM AGT = 1.0 (0 db) at 585 mhz. Autosegmentation = 21
CE
GW 8 1 7.2 1.125 -0.8 7.35 1.4 -0.8 0.05
GW 9 1 7.35 1.4 -0.8 7.45 1.7 -0.8 0.05
GW 10 3 7.45 1.7 -0.8 7.45 3.15 -1.07 0.05
GW 11 3 7.45 3.15 -1.07 7.45 4.6 -1.33 0.05
GW 12 3 7.45 4.6 -1.33 7.45 5.25 0 0.05
GW 13 3 7.45 5.25 0 7.45 4.6 1.33 0.05
GW 14 3 7.45 4.6 1.33 7.45 3.15 1.07 0.05
GW 15 3 7.45 3.15 1.07 7.45 1.7 0.8 0.05
GW 16 3 7.45 1.7 0.8 7.45 0.88 0.8 0.05
GW 17 1 7.45 0.88 0.8 7.45 0.38 0.8 0.05
GW 18 1 7.2 1.125 -0.8 7.05 1.4 -0.8 0.05
GW 19 1 7.05 1.4 -0.8 6.95 1.7 -0.8 0.05
GW 20 3 6.95 1.7 -0.8 6.95 3.15 -1.07 0.05
GW 21 3 6.95 3.15 -1.07 6.95 4.6 -1.33 0.05
GW 22 3 6.95 4.6 -1.33 6.95 5.25 0 0.05
GW 23 3 6.95 5.25 0 6.95 4.6 1.33 0.05
GW 24 3 6.95 4.6 1.33 6.95 3.15 1.07 0.05
GW 25 3 6.95 3.15 1.07 6.95 1.7 0.8 0.05
GW 26 3 6.95 1.7 0.8 6.95 0.88 0.8 0.05
GW 27 1 6.95 0.88 0.8 6.95 0.38 0.8 0.05
GW 28 1 7.45 1.7 -0.8 6.95 1.7 -0.8 0.05
GW 29 1 7.45 3.15 -1.07 6.95 3.15 -1.07 0.05
GW 30 1 7.45 4.6 -1.33 6.95 4.6 -1.33 0.05
GW 31 1 7.45 5.25 0 6.95 5.25 0 0.05
GW 32 1 7.45 4.6 1.33 6.95 4.6 1.33 0.05
GW 33 1 7.45 3.15 1.07 6.95 3.15 1.07 0.05
GW 34 1 7.45 1.7 0.8 6.95 1.7 0.8 0.05
GW 35 1 7.45 0.88 0.8 6.95 0.88 0.8 0.05
GW 36 1 7.45 0.38 0.8 6.95 0.38 0.8 0.05
GW 37 1 6.95 0.88 0.8 6.25 0.88 0.8 0.05
GW 38 3 6.95 0.38 0.8 5.95 0.38 0.8 0.05
GW 39 1 5.95 0.38 0.8 5.95 0.58 0.8 0.05
GW 40 1 5.95 0.58 0.8 6.25 0.88 0.8 0.05
GW 41 5 5.95 0.38 0.8 4.2 0.38 0.8 0.05
GW 42 5 5.95 0.58 0.8 4.2 0.58 0.8 0.025
GW 43 1 4.2 0.38 0.8 4.2 0.58 0.8 0.025
GW 44 3 4.2 0.38 0.8 2.95 0.38 0.8 0.025
GW 45 3 4.2 0.58 0.8 2.95 0.58 0.8 0.025
GW 46 1 7.2 -1.125 -0.8 7.35 -1.4 -0.8 0.05
GW 47 1 7.35 -1.4 -0.8 7.45 -1.7 -0.8 0.05
GW 48 3 7.45 -1.7 -0.8 7.45 -3.15 -1.07 0.05
GW 49 3 7.45 -3.15 -1.07 7.45 -4.6 -1.33 0.05
GW 50 3 7.45 -4.6 -1.33 7.45 -5.25 0 0.05
GW 51 3 7.45 -5.25 0 7.45 -4.6 1.33 0.05
GW 52 3 7.45 -4.6 1.33 7.45 -3.15 1.07 0.05
GW 53 3 7.45 -3.15 1.07 7.45 -1.7 0.8 0.05
GW 54 3 7.45 -1.7 0.8 7.45 -0.88 0.8 0.05
GW 55 1 7.45 -0.88 0.8 7.45 -0.38 0.8 0.05
GW 56 1 7.2 -1.125 -0.8 7.05 -1.4 -0.8 0.05
GW 57 1 7.05 -1.4 -0.8 6.95 -1.7 -0.8 0.05
GW 58 3 6.95 -1.7 -0.8 6.95 -3.15 -1.07 0.05
GW 59 3 6.95 -3.15 -1.07 6.95 -4.6 -1.33 0.05
GW 60 3 6.95 -4.6 -1.33 6.95 -5.25 0 0.05
GW 61 3 6.95 -5.25 0 6.95 -4.6 1.33 0.05
GW 62 3 6.95 -4.6 1.33 6.95 -3.15 1.07 0.05
GW 63 3 6.95 -3.15 1.07 6.95 -1.7 0.8 0.05
GW 64 3 6.95 -1.7 0.8 6.95 -0.88 0.8 0.05
GW 65 1 6.95 -0.88 0.8 6.95 -0.38 0.8 0.05
GW 66 1 7.45 -1.7 -0.8 6.95 -1.7 -0.8 0.05
GW 67 1 7.45 -3.15 -1.07 6.95 -3.15 -1.07 0.05
GW 68 1 7.45 -4.6 -1.33 6.95 -4.6 -1.33 0.05
GW 69 1 7.45 -5.25 0 6.95 -5.25 0 0.05
GW 70 1 7.45 -4.6 1.33 6.95 -4.6 1.33 0.05
GW 71 1 7.45 -3.15 1.07 6.95 -3.15 1.07 0.05
GW 72 1 7.45 -1.7 0.8 6.95 -1.7 0.8 0.05
GW 73 1 7.45 -0.88 0.8 6.95 -0.88 0.8 0.05
GW 74 1 7.45 -0.38 0.8 6.95 -0.38 0.8 0.05
GW 75 1 6.95 -0.88 0.8 6.25 -0.88 0.8 0.05
GW 76 3 6.95 -0.38 0.8 5.95 -0.38 0.8 0.05
GW 77 1 5.95 -0.38 0.8 5.95 -0.58 0.8 0.05
GW 78 1 5.95 -0.58 0.8 6.25 -0.88 0.8 0.05
GW 79 5 5.95 -0.38 0.8 4.2 -0.38 0.8 0.05
GW 80 5 5.95 -0.58 0.8 4.2 -0.58 0.8 0.025
GW 81 1 4.2 -0.38 0.8 4.2 -0.58 0.8 0.025
GW 82 3 4.2 -0.38 0.8 2.95 -0.38 0.8 0.025
GW 83 3 4.2 -0.58 0.8 2.95 -0.58 0.8 0.025
GW 84 69 1.49 16.65 1.94 1.49 -16.65 1.94 0.125
GW 85 69 3.35 16.65 4.36 3.35 -16.65 4.36 0.125
GW 86 69 5.21 16.65 6.77 5.21 -16.65 6.77 0.125
GW 87 69 7.07 16.65 9.19 7.07 -16.65 9.19 0.125
GW 88 69 9.81 16.65 12.75 9.81 -16.65 12.75 0.125
GW 89 69 12.55 16.65 16.32 12.55 -16.65 16.32 0.125
GW 90 69 15.29 16.65 19.87 15.29 -16.65 19.87 0.125
GW 91 69 1.49 16.65 -1.94 1.49 -16.65 -1.94 0.125
GW 92 69 3.35 16.65 -4.36 3.35 -16.65 -4.36 0.125
GW 93 69 5.21 16.65 -6.77 5.21 -16.65 -6.77 0.125
GW 94 69 7.07 16.65 -9.19 7.07 -16.65 -9.19 0.125
GW 95 69 9.81 16.65 -12.75 9.81 -16.65 -12.75 0.125
GW 96 69 12.55 16.65 -16.32 12.55 -16.65 -16.32 0.125
GW 97 69 15.29 16.65 -19.87 15.29 -16.65 -19.87 0.125
GW 98 13 12.47 2.86 0 12.47 -2.86 0 0.035
GW 99 13 18.04 2.86 0 18.04 -2.86 0 0.035
GW 100 13 23.61 2.86 0 23.61 -2.86 0 0.035
GW 101 13 29.18 2.86 0 29.18 -2.86 0 0.035
GW 102 13 34.75 2.86 0 34.75 -2.86 0 0.035
GW 103 13 40.32 2.86 0 40.32 -2.86 0 0.035
GW 104 13 45.89 2.86 0 45.89 -2.86 0 0.035
GW 105 13 51.46 2.86 0 51.46 -2.86 0 0.035
GW 106 13 57.03 2.86 0 57.03 -2.86 0 0.035
GW 107 13 62.6 2.86 0 62.6 -2.86 0 0.035
GW 108 13 68.17 2.86 0 68.17 -2.86 0 0.035
GW 109 13 73.74 2.86 0 73.74 -2.86 0 0.035
GW 110 13 79.31 2.86 0 79.31 -2.86 0 0.035
GW 111 13 84.88 2.86 0 84.88 -2.86 0 0.035
GW 112 13 12.87 2.86 0 12.87 -2.86 0 0.035
GW 113 13 18.44 2.86 0 18.44 -2.86 0 0.035
GW 114 13 24.01 2.86 0 24.01 -2.86 0 0.035
GW 115 13 29.58 2.86 0 29.58 -2.86 0 0.035
GW 116 13 35.15 2.86 0 35.15 -2.86 0 0.035
GW 117 13 40.72 2.86 0 40.72 -2.86 0 0.035
GW 118 13 46.29 2.86 0 46.29 -2.86 0 0.035
GW 119 13 51.86 2.86 0 51.86 -2.86 0 0.035
GW 120 13 57.43 2.86 0 57.43 -2.86 0 0.035
GW 121 13 63 2.86 0 63 -2.86 0 0.035
GW 122 13 68.57 2.86 0 68.57 -2.86 0 0.035
GW 123 13 74.14 2.86 0 74.14 -2.86 0 0.035
GW 124 13 79.71 2.86 0 79.71 -2.86 0 0.035
GW 125 13 85.28 2.86 0 85.28 -2.86 0 0.035
GW 126 5 7.2 -1.125 -0.8 7.2 1.125 -0.8 0.0216
GS 0 0 0.0254 ' All in in.
GE 0
EK
LD 5 0 0 0 2.5e7 0
EX 0 126 3 0 1 0
GN -1
FR 0 1 0 0 761 0