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Chapter 4 - Channel control unit 177
Description
THOMSON TTV1707 / CCU DT500
User manual
B1707M00LD
September 2000
5. «CAMERA: ON, OFF, CABLE OPEN»
indicator lights
• ON:
Normally and permanently lit, this light
indicates that the camera is powered.
This indicator light when flashing indica-
tes excessive consumption at the camera.
The current in the triaxial cable is then
between 3 A and 3.3 A. Above 3.3 A, the
Channel Control Unit power supply cuts
out. rearming is obtained automatically 4
times. If the overload persists, the cut-out
becomes permanent. An equipment
on/off is then required to start the equip-
ment operating again.
•OFF:
This permanently lit indicator light indica-
tes that the camera power is off.
When flashing, this indicator light indica-
tes that the camera consumption is exces-
sively low. The current in the triaxial
cable is then between 0.1 A and 0.4 A.
• CABLE OPEN:
This normally extinguished indicator light
indicates that the triaxial cable is not con-
nected to the camera or to the back panel
of the Channel Control Unit.
6. «ON AIR» indicator light When lit, this light indicates that the equip-
ment is switched to the antenna («ON
AIR1»).
7. «MAINS» switch The equipment master on/off switch:
• «I»: The equipment is operating.
• «O»: The equipment is not operating.