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3-6. Auto Iris Level Adjustment
Adjustment location: SW401, SW402, VR401 (CA-4)
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope
Subject: Gray scale chart
Preparation:
1. Auto iris switch (SW401) : "DC" position
BLC switch (SW402) : "OFF" position
2. Attach the automatic iris lens, and then adjust the distance
between the camera and the subject so that the gray scale
waveform width is 30 sec. (Refer to the figure below.)
Adjusting method:
1. Turn VR401 clockwise as far as it will go. (The white level
will become distorted.)
2. Turn VR401 counterclockwise untill the waveform level is
550
10 mVp-p during video output.
VIDEO OUTPUT
3-7. Backlight Compensation Adjustment
Adjustment location: VR204 (CA-2), SW402
Measuring location: VIDEO OUT
Measuring equipment: Oscilloscope
Subject: Gray scale chart
Preparation:
1. BLC switch (SW402) : "ON" position
2. Attach the automatic iris lens, and then adjust the distance
between the camera and the subject so that the gray scale
waveform width is 30 sec. (Refer to the figure below.)
Adjustment method:
1. Adjust with VR204 so that the waveform level is 700
mVp-p during video output.
2. Return the BLC switch (SW402) to the "OFF" position.
VIDEO OUTPUT
3-8. Line Phase Adjustment
Adjustment location: VR502 (CA-5)
Measuring location: VIDEO OUT, 24 V AC terminals
Measuring equipment: Oscilloscope
Subject: Gray scale chart
Preparation:
1. Set the oscilloscope synchronization to vertical synchroni-
zation.
2. Connect the oscilloscope probe to the right side of the 24 V
AC terminals, and then connect the probe GND to the left
side of the 24 V AC terminals.
Adjusting method:
1. Turn VR502 to adjust so that the phase difference between
the leading edge of the vertical synchronization signal of
the video output and the zero-cross point of the 24 V AC
line waveform is 0
3-9. Flange-back Adjustment
Adjustment location: Flange back adj. screw
Measuring location: Monitor display
Measuring equipment: Video monitor
Subject: Siemens star chart
Preparation:
1. Attach the zoom lens.
Adjusting method:
1. Using a + screwdriver, loosen the FLANGE BACK LOCK
screw. Set the zoom lens to the maximum telephoto posi-
tion, and set the focus using on the lens.
2. Set the zoom lens to the maximum wide angle position, and
30
set the focus using the FLANGE BACK ADJ. screw.
3. Repeat steps 2. and 3. until the image stays in focus when
changing from a telephoto shot to a wide angle shot.
When the setting is complete, tighten the FLANGE BACK
LOCK screw.
- 5 -
1 msec.
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