Hitachi HV-D20P Operation Manual page 39

6) CLOSE Limit : (Lens Type is DC mode.)
Observe the iris and adjust to precisely the largest value (smallest diameter). The setting range is
from -128 to -1.
simultaneously for about 2 seconds to set to -85 for Cosmicar or to -65 for Others.
Notes:
1. Before this adjustment, set AGC to OFF and Shutter to Off. Return the previous settings after
adjusting.
2. Close Limit needs to be set properly for normal AES coupled operation.
7) IRIS GAIN : Iris control voltage gain adjustment (Lens Type is Video mode).
Adjustment is required when replacing a Video type lens or if using the camera for the first time. The
setting range is from -10 to 10. Press R to increase and L to decrease the setting. Simultaneously
press the L and R buttons for about 2 seconds to set to 0.
Next adjust the lens Level control to highlight the central marker of the video signal level indicator.
Adjust the lens level control to where the circle is positioned at the video signal level indicator triangle
mark. Refer to description of video signal type lens adjustment (page 8).
If auto iris does not operate even at the Hi or Low extremes of the Level setting, adjust the Iris Gain
setting.
Notes: Before adjusting Iris Gain, be sure to set the AGC to OFF, and Over-ride to 0. Adjustment is
incorrect in the AGC mode. After adjusting, return the previous settings.
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Press R to increase and L to decrease the setting. Press L and R buttons