Hitachi HV-D25 - Manual (Page 21)

8
2) Adjustment
Hold the U button depressed and press Setup for about 2 seconds to display the Special Set menu. Change
to the Lens screen and check the Lens Type setting. If DC, change this to Video.
(1) Set the lens ALC control fully toward the average (Av ) position.
(2) If auto iris hunting occurs, reduce the Iris Gain setting.
(3) Adjust the lens level control to highlight the central marker of the video signal level indicator.
(4)
If the camera video signal detection level is optimu the + marker is highlighted. If larger than optimum the to the
right of + is highlighted and if lower the to the left is highlighted.
3) Lens adjustment difficult or impossible
(5) Video signal level indication unstable
(6) Unstable indication can occur if the light source has flicker component e. g., fluorescent or mercury lighting , change
the electronic shutter mode ( Sub- menu 1 shutter or Variable ) to reduce the flicker.
(7) Lens Level control fully at Hi, but auto iris inoperative Reduce the Iris Gain setting.
(8) Lens Level control fully at Low, but auto iris inoperative Increase the Iris Gain setting.
(9) Auto iris operates, but scene is dark. Even if lens Level control is adjusted the mark to the left of the + mark is
highlighted.
10) Boost the gain. Set main menu Gain to High or Max and Sub-menu Gain High to 1 10 dB or Gain Max to 11 20 dB in
order to raise the sensitivity.
Note
:
The video signal level indicator sensitivity is high in order to increase lens adjustment accuracy. Operate the lens Level control
slowly.
Video signal indicator
< LENS (APP-1)
LENS TYPE :VIDEO
IRIS GAIN : 0
REFERENCE
H L
Video mode menu screen