Blonder tongue AMM-806, Справочное руководство, Страница: 218 / 285

211
Antenna Phasing
Signal Nulling
Instructions:
1. Determine angle “
φ
“ using a field strength meter, compass, and a
single channel antenna.
2. Locate angle “
φ
“ in chart No. III and determine d(
λ
);
multiply
λ
(inches) in chart No. II to find the spacing of “H”.
3. Both antennas must be identical, facing in the same direction, in the
same horizontal plane and both be right side up.
4. For angles not listed, d(
λ
) = 1
2 sin (
φ
)
5 5.733 50 0.653
10 2.880 55 0.610
15 1.931 60 0.577
20 1.462 65 0.551
25 1.183 70 0.532
30 1.000 75 0.517
35 0.871 80 0.507
40 0.777 85 0.502
45 0.707 90 0.500
φ
° d(
λ
)
φ
° d(
λ
)
Chart No. III
2 208
3 188
4 172
5 150
6 139
FM 120
7 67
8 65
9 62
10 61
11 59
12 57
13 55
Chart No. II
φ
°
λ
(inches)