Technicolor - Thomson STUDIO CAMERA LDK 20(S) - Manual (Page 16)

2-8 Technical Manual LDK 20(S) - Studio Camera Installation
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
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 (for camera
see the connectors and cables section). If a channel
is used for private data, then of course the original
functions are no longer available.
To select the function of the base station to camera
channel use S801 on the Audio/intercom board. Position
AB selects the Progr function (factory setting); position
AC selects the private data function.
To select the function of the camera to base station
channel use S802 on the Audio/intercom board. Position
AB selects the tracker microphone function (factory
setting); position AC selects the private data function.
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 µsec. and can be
more than 30 µsec, depending on the type of triax
cable.
Data signal specifications:
Baudrate:
2400
Input level: TLL, possible RS232
Input impedance: 100Kohm
Output impedance: ~300 ohm
Max load:
~1Kohm
S802
C A B
S801
C A B
X
1
9
A
X
1
9
B
TOP SIDE Audio Intercom LF
A1
Program
Private data
Tracker
Private data
S801
S802
Basestation