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)
Summary of Contents for AMM-806
Page 86: ...79 TVCB PC Installation ...
Page 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Page 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Page 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Page 157: ...150 US Frequency Spectrum ...
Page 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Page 175: ...168 Common CATV Symbols ...
Page 176: ...169 Common CATV Symbols ...
Page 177: ...170 Digital L Band Distribution Symbols ...
Page 178: ...171 Digital L Band Distribution Symbols ...
Page 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Page 187: ...180 Echo Rating Graph ...
Page 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Page 190: ...183 Heterodyne Modulator Analog ...
Page 191: ...184 Heterodyne Processor Analog ...
Page 213: ...206 Multiplexers ...
Page 285: ...Rev 8 0 ...