This is a small motor in a C-band dish feed assembly. This motor selects whether vertical or horizontal polarization is to be received.
Servo motor
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Just to confuse things we call that a polar-rotor motor and it is used at many frequencies to include C-band and Ku.
Star Choice for example, unlike DirecTV or DISH uses horizontal and vertical polarization and use the same type of polar-rotor used in C Band
Star Choice for example, unlike DirecTV or DISH uses horizontal and vertical polarization and use the same type of polar-rotor used in C Band