Auxiliary Connections; Private Data - GRASS VALLEY LDK 4502 User Manual

Chapter 2 - Installation

2.6 Auxiliary connections

2.6.1 Private data

Private data channels can be used for the transmission of serial data via the Triax cable. For
example, electronic scriptboard or character data for a video display unit or pan and tilt data can
be transmitted to the camera.
The tracker microphone intercom channel is used for the data channel from camera head to
Base Station. The program intercom channel is used for the data channel from Base Station to
camera head. The input and output signals are available on the auxiliary connectors of the
camera and Base Station. If a channel is used for private data, then of course the original
functions are no longer available.
Figure 2-10. Private data on auxiliary connector
9
6
To select the function of the Base Station to camera channel set the Base Station menu item
AUDIO\INTERCOM\INTERCOM\PRIVATE DATA\PROG Channel to Priva.
To select the function of the Camera to Base Station channel set the Base Station menu item
AUDIO\INTERCOM\INTERCOM\PRIVATE DATA\TRACKER CHANNEL to PRIVATE.
Remember that the propagation-delay times are different for different Triax cable lengths,
especially if a return signal is involved. At maximum lengths of 2400 metres the total delay is at
least 25 µs and can be more than 30 µs depending on the type of Triax cable.
The duty cycle difference between input and output is max. 5%.
Function
Baudrate
Input level
Input impedance
Output impedance
Max load
24
5
Private date in
1
Private data out
Value
2400 bits/sec typical; 4800 bits/sec max.
TTL, possible RS232 ("0"= 0V +/- 0.5V; "1"= 5V +/- 0.5V)
100 KΩ
150 Ω
~1 KΩ
LDK 4502/4503/4506 HDTV camera base station User's Guide (v3.5)