Table Of Contents - Andrew 174100 Installation And Maintenance Manual

Paragraph Title
1 General Description and Theory of Operation................................................................ 9
1.1 Scope .............................................................................................................................. 9
1.2 Purpose of Equipment ..................................................................................................... 9
1.3 Equipment Supplied ........................................................................................................ 9
1.4 Physical Description ...................................................................................................... 9
1.4.1 Antenna ........................................................................................................................... 9
1.5 Functional Description .................................................................................................. 10
1.5.1 Antenna Unit ................................................................................................................. 10
1.5.1.1 Reflector ....................................................................................................................... 10
1.5.1.2 Dual Feed Assembly ..................................................................................................... 10
1.5.2 Polarization and Beamswitch Box ................................................................................ 10
1.6 Theory of Operation ..................................................................................................... 11
1.6.1 Dual Feed Assembly ..................................................................................................... 11
1.6.2 Reflector ....................................................................................................................... 11
1.6.3 Detailed Circuit Analysis .............................................................................................. 11
1.6.3.1 Antenna Unit ................................................................................................................. 11
1.6.3.2 Azimuth Antenna Pattern ............................................................................................. 12
1.6.3.3 Elevation Patterns ......................................................................................................... 12
1.63.4 Other Antenna Specifications ....................................................................................... 12
1.6.3.5 Antenna Reflector ......................................................................................................... 12
1.6.3.6 Reflector Mounting and Tilt Adjustment ...................................................................... 13
1.6.4 Dual Feed Assembly ..................................................................................................... 13
1.6.4.1 Feed Assembly.............................................................................................................. 13
1.6.4.2 Circular Polarization Generation .................................................................................. 13
1.6.4.3 Transmitting Circularly Polarized Signals .................................................................... 14
1.6.4.4 Receiving Circularly Polarized Signals ........................................................................ 14
1.6.4.5 Transmitting and Receiving Linearly Polarized Signals .............................................. 15
1.6.4.6 Feedhorn Assembly ...................................................................................................... 15
1.6.4.7 Polarizer/Feed Assembly Mechanical Operation.......................................................... 15

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