Telemetry Receivers are used to control functional
(PTX) cameras. They translate data commands from the control keyboard,
which drive the motors in the pan & tilt head or zoom lens.
In coaxial telemetry systems, the same coaxial
cable that takes the picture from the camera to the controller
is used to bring the control commands back, in the reverse direction.
In twisted pair systems, a coaxial cable is
used for picture transmission only. A separate twisted-pair cable
feeds the data commands to the receiver from the keyboards.
One Telemetry Receiver is required for each
functional camera on the system.
AC Telemetry Receivers are used to drive AC
type Pan & Tilt heads. These move typically at 6 degrees per
second and take one minute to do one revolution.
DC Telemetry Receivers are used to drive
DC type Pan & Tilt heads. These are fast and variable in speed,
travelling up to 48 degrees per second when panning.
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