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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
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
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
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
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.
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
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.
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
Waveform
Video Output
Signal Waveform
Signal Waveform
2H ± 4H
–
+
V SYNC
Fig. 4-1-3
Fig. 4-1-2
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