2-10
790 mV
±
30 mV
8
Press the
ENTER
key for next adjustment.
(4) High Clip Level Adjustment
Test Point:
Video Output Connector
8
Confirm the Colour Temperature at 3 200°K.
8
Aim the Camera at the Logarithmic Gray Scale Chart.
8
Connect the terminated Oscilloscope with 75
Ω
to the
Video Output Connector.
8
Adjust data with the
ARROW
keys so that the High clip
level becomes 790 mV ± 30 mv as shown in Fig. 4-1-3.
(5) Pedestal Adjustment
Test Point:
Video Output Connector
8
Connect the terminated Oscilloscope with 75
Ω
to the
Video Output Connector.
8
Adjust data with the
ARROW
keys so that the Pedestal
level becomes 50 mV ± 10 mV as shown in Fig. 4-1-4.
Fig. 4-1-4
8
Press the
ENTER
key for next adjustment.
50 mV
±
10 mV
4.1.4. Adjustment Procedure
8
Select the item
"1. SC FREQUENCY"
with the
ARROW
key and press the
ENTER
key.
(1) Subcarrier Frequency Adjustment
for INT mode
Test Point:
TD4 (SC VCXO)
Main Board
8
Connect the Frequncy Counter to TD4.
8
Adjust data with the
ARROW
keys so that the Subcarrier
Frequency becomes 17.73447 MHz ± 40 Hz.
8
Press the
ENTER
key for next adjustment.
(2) Subcarrier Frequency Adjustment
for LL mode
Test Point:
TD4 (SC VCXO)
Main Board
8
Connect the Frequncy Counter to TD4.
8
Adjust data with the
ARROW
keys so that the Subcarrier
Frequency becomes 17.73447 MHz ± 40 Hz.
8
Press the
ENTER
key for next adjustment.
(3) Line Lock Phase Adjustment
Test Point:
Video Output Connector
AC Live Waveform
8
Connect the CH1 of the Oscilloscope to the Video Output
Connector.
8
Connect the CH2 of the Oscilloscope to the AC Power
Line.
8
Trigger the Oscilloscope at V-rate.
8
Adjust data with the
ARROW
keys so that the decay point
of V-sync signal gains 2H ± 4H from the zero-cross point
of the AC Power Line Input Waveforms as shown in Fig.
4-1-2.
8
Press the
ENTER
key for the next adjustment.
8
Adjust data with the
ARROW
keys so that the decay point
of V-sync signal gains 2H ± 4H from the zero-cross point
of the AC Power Line Input Waveforms as shown in Fig.
4-1-2.
8
Press the
ENTER
key for the next adjustment.
Zero-Cross Point
AC Line Input
Waveform
Video Output
Signal Waveform
2H
±
4H
–
+
V SYNC
Fig. 4-1-3
Fig. 4-1-2
