GRASS VALLEY XCU - Using Private Data

26 XCU eXchangeable Control Unit User’s Guide (v1.6)
Chapter 2 - Installation
2.7 Using private data
Private data channels can be used for sending serial data via the transmission cable. For
example, electronic scriptboard or character data for a video display unit or pan and tilt data can
be transmitted to the camera.
☞
Note
☞
Note
Propagation-delay times vary with cable length, especially if a return signal is involved. At
max.lengths the total delay is at least 25 μs and can be more than 30 μs depending on the type
of cable. The duty cycle difference between input and output is max. 5%.
5
4
3
2
1
9
8
7
6
Private
data in
Private
data out
Function Value
Bitrate max. 100 kbit/s
Output level (high) > 4 V
Output level (low) < 4 V
Output impedance 250 
Input level (high) > 2 V (max. 12 V)
Input level (low) < 2 V
Input impedance > 4.7 k