Technicolor - Thomson LDK 4502 manual Private Data, Data signal specifications

Private Data

Triax Cable

Tracker Channel PROG Channel

P&T

HDTV

Camera Base Station

Tracker Channel

CTL

PROG Channel

A Control is as an example

connected to the Aux

connector.

A pan and tilt unit as an example connected to the Aux connector.

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 Camera to Base Station channel set the Base Station menu item Audio/Intercom \ Private Data \ Tracker Channel to Priva.

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

To select the function of the Base Station to camera channel set the Base Station menu item Audio/Intercom \ Private Data \ PROG Channel to Priva.

Input impedance: 100Kohm

Output impedance: ~300 ohm

Max load: ~1Kohm

Installation User's Guide LDK 4502 - HDTV Camera Base Station 2-21