Grass Valley TTV 1707 - Manuel (Page 143)

Chapter 2 - Installation 143
Adaptation of channel control unit to external signal controls from the antenna
THOMSON TTV1707 / CCU DT500
User manual
B1707M00LD
September 2000
2.7 - ADAPTATION OF CHANNEL CONTROL UNIT TO EX-
TERNAL SIGNAL CONTROLS FROM THE ANTENNA
The «ON AIR 1» and «ON AIR 2» main and secondary antenna commands received by
the Channel Control Unit may be of two different forms:
• A DC voltage of between + 5 Volts and + 48 Volts.
• A closed loop (contact).
Adaptation is made in the «SOUND/AUX» board of the Channel Control Unit.
Depending on the type of control from the mixer, set selector switches S800 and S801 (ON
AIR 1) and S900 and S901 (ON AIR 2) to the positions indicated in the figure below.
Note: Selector switches S1000 and S1001 are not used.
ON AIR1 adaptation
Control S800-S801
+5 V to +48 V Voltage
Loop Contact
ON AIR2 adaptation
Control S900-S901
+5 V to +48 V Voltage
Loop Contact
SOUND / AUX PCB
S1000
S1001
S900
S901
S800
S801