Grass Valley LDK 5417 - Manual (Page 50)

LDK 5417 + LDK 4417 User’s Guide | Base Station installation 38
External reference without blackburst
The reference signal should be a black video signal and terminated with 75 Ohms load.
Set the upper switch of S1151 to «OFF». The output composite signal carrier is internally
slaved with respect to the sync signals.
The horizontal phase of the composite signal with respect to the external reference signal
is adjusted using the «
ΦH COARSE» and «ΦH FINE» thumbwheels:
The SC/H phase alignment of the composite output signal is adjusted using the «SC/H»
thumbwheel.
Adjustment of the front porch of the composite signal is made using the «FRONT
PORCH» thumbwheel.
Equipment without external reference (free mode)
The «
ΦH COARSE» and «ΦH FINE» thumbwheels are inactive.
The output composite signal SC/H phase alignment is adjusted using the «SC/H»
thumbwheel.
The output composite signal front porch duration is adjusted using the «FRONT PORCH»
thumbwheel.
10.4 Adaptation of BS to external on-air signal controls from
the studio
The «ON AIR 1» and «ON AIR 2» main and secondary studio commands received by the
Base Station 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 Base Station.
ON AIR 1
S800
S801 R500
S500
CONTACT
+12dB 0dB
VOLTAGE
MIC-2 MIC-1
OUT LEVEL
R540
S540
+12dB 0dB
+12dB
0dB
4W
RTS
OUT LEVEL
CCU->CAM CAM->CCU
ON AIR 2
S900
S581
R580
S580
S560
S901
CONTACT
OUT LEVEL
VOLTAGE
SOUND / AUX PCB