Vinten Radamec Free-d User Manual
Page 38
Vinten Broadcast Ltd
free
-
d
™
Installation Manual V1.4.4
Page 38 of 46
In the case of command 02 (request camera ID) the <CA> byte in the
message should be set to FF. The
free-d™
unit replies with an A4 message
having the <CA> byte set to the current camera ID and the <CD> byte set to
02.
For command FF (poll) the
free-d™
unit replies with an A2 message.
A.3.12 Type A2 - camera position/orientation data (Radamec mode)
The A2 message is used for transferring the camera position and orientation
data from the Free-d unit in a form compatible with Vinten Radamec robotic
pedestals. Note that there is no provision to send a ‘roll’ value, so the camera
must be mounted on a tripod or pedestal.
The message contains 30 bytes as follows:
<A2>
Message type
<CA>
Camera ID
<PH><PM><PL> Camera Pan Angle
<TH><TM><TL> Camera Tilt Angle
<ZH><ZM><ZL> Camera Zoom
<FH><FM><FL> Camera Focus
<HH><HM><HL> Camera Height (Z-Position)
<XFH><XFL>
Camera X-Position (fraction)
<XIH><XIL>
Camera X-Position (integer)
<YFH><YFL>
Camera Y-Position (fraction)
<YIH><YIL>
Camera Y-Position (integer)
<00><00>
Pedestal Orientation (set to zero)
<SH><SL>
Spare / User Defined (16 bits)
<CK>
Checksum
The Pan Angle is expressed as a 24-bit integer in units of 1/900 degrees,
where zero is represented by 080000 hex. The range of values is from -180.0
degrees (058730 hex) to +180.0 degrees (0A78D0 hex).
The Tilt Angle is expressed as a 24-bit integer in units of 1/900 degrees, where
zero is represented by 080000 hex. The range of values is from -90.0 degrees
(06C398 hex) to +90.0 degrees (093C68 hex).
The Camera Zoom is expressed as a 24-bit positive unsigned number in
arbitrary units related to the rotation of the ‘zoom ring’ on the camera lens. It
will be necessary for the host system to convert this to a true zoom value
based on the type and particular sample of lens and camera in use.
The Camera Focus is expressed as a 24-bit positive unsigned number in
arbitrary units related to the rotation of the ‘focus ring’ on the camera lens. It