Digital Video Cassette Technology
62
AGC Adjustment
1. Select the AGC procedure in the list box in the Adjustment Utility window.
Figure 100 AGC Adjustment
2.
Read the procedure.
3. Remove the Chart Holder from the Light Box so the camcorder is shooting
the ground glass in the Light Box.
4. Insert a ND 3.3 Neutral Density filter into the filter slot of the Light Box.
You can add Neutral Density filters to achieve the desired value. For
example add a ND 3.0 and ND 0.3 filter for the value ND 3.3.
5. Click the Start button in the Adjustment Utility window. The Confirmation
window appears.
6. Click the Yes button in the Confirmation window. The Editing window
appears.
7. Use an oscilloscope to observe the video output signal. Click the Up and
Down Arrows in the Editing window to set the amplitude of the video
output signal from the blanking level to the peak to 0.35 ± 0.01 V p - p, or
the value specified in the software.
Figure 101 AGC Amplitude
8. Then click the OK button in the Editing window. The Information window
appears.
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