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Antenna General Information
Factors Which Determine The Quality Of Reception:
A) Distance to transmitter
B) Height of transmitting antenna
C) Transmitter power
D) Transmitter frequency (TV channel)
E) Type of receiving antenna
F) Height of receiving antenna
G) Terrain between the transmitter and receiving antenna
H) Obstacles between the transmitter and receiving antenna
(tall buildings, water tower, etc.)
Major Characteristics:
Gain:
Indicates the amount of received signal level
increase as compared to reference antenna.
(usually a resonant dipole)
Bandwidth:
The range of frequencies (TV channels) over
which the antenna is designed to operate. In
principle, there are two types of antennas:
1) Broadband
2) Single-Channel
Impedance:
Home type antennas are usually 300 Ohms and
commercial antennas are usually 75 Ohms.
Pattern:
Generally consists of two components, beam width
and front to back ratio. Refer to diagram.
Содержание AMM-806
Страница 86: ...79 TVCB PC Installation ...
Страница 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Страница 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Страница 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Страница 157: ...150 US Frequency Spectrum ...
Страница 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Страница 171: ...164 F C x 32 Temperature Conversion Nomograph C F FAHRENHEIT F CELSIUS C 9 5 C F 32 5 9 KELVIN K K C 273 ...
Страница 175: ...168 Common CATV Symbols ...
Страница 176: ...169 Common CATV Symbols ...
Страница 177: ...170 Digital L Band Distribution Symbols ...
Страница 178: ...171 Digital L Band Distribution Symbols ...
Страница 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Страница 187: ...180 Echo Rating Graph ...
Страница 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Страница 190: ...183 Heterodyne Modulator Analog ...
Страница 191: ...184 Heterodyne Processor Analog ...
Страница 213: ...206 Multiplexers ...
Страница 215: ...208 Antenna Stacking Methods to Increase Received Signal Level NOTE Refer to Antenna Spacing Chart for dimensions ...
Страница 216: ...209 Antenna Spacing Mounting Channelized Antennas on the Same Mast NOTE Refer to Antenna Spacing Chart for dimensions ...
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