Technicolor - Thomson LDK 20(S) technical manual Private Data

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 channeluseS801ontheAudio/intercomboard.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 channeluseS802ontheAudio/intercomboard.Position AB selects the tracker microphone function (factory setting); position AC selects the private data function.

Rememberthatthepropagation-delaytimesaredifferent 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

C A B

S801

C A B

S802

1X A9

1X B9

A1

Program S801

Private data

Tracker S802

Private data

Basestation

TOP SIDE Audio Intercom LF

2-8 Technical Manual LDK 20(S) - Studio Camera Installation