Black Offset Adjustment - Sony HDCAM HDW-F900R Maintenance Manual

9-6. Black Offset Adjustment

Preparation
. Lens iris → CLOSE
. GAIN switch → H
. Complete the setting as shown below by using the setup
menu.
MENU : OPERATION
PAGE : 01*OUTPUT SEL
ITEM : TEST OUT SELECT → HD
MENU : OPERATION
PAGE : 10*GAIN SW
ITEM : GAIN HIGH → 30 dB
MENU : SERVICE
PAGE : 06*RP DC OFFSET
ITEM : DC ADJ MODE → ON
Adjustment Procedure
Equipment : B/W monitor, Oscilloscope
Measurement point : TEST OUT connector (outside panel)
1. Complete the setting as shown below by using the
setup menu.
MENU : SERVICE
PAGE : 06*RP DC OFFSET
ITEM : OUTPUT SELECT → R
2. Complete the adjustment as shown below by using the
setup menu.
MENU : SERVICE
PAGE : 06*RP DC OFFSET
ITEM : R DC OFFSET 180
Specification : The two white vertical lines (A) appear
on the right end of monitor display
when the rotary encoder is turned to
increase the value in the menu in the
positive (+) direction. The two white
vertical lines (B) appear below A when
the rotary encoder is turned to increase
the value in the menu in the negative
(_) direction. The two lines of A and B
should have unity brightness.
n
Record the value generated through the adjustment
of step 2. This will be used in steps 4, 8, 12.
HDW-F900R/V1 (E)
m
. Do not change the setting of the R DC OFFSET 0.
. If the lines A and B are difficult to view on the
screen, open the lens iris a little. It facilitates
viewing of the lines of A and B.
3. Complete the setting as shown below by using the
setup menu.
MENU : OPERATION
PAGE : 10*GAIN SW
ITEM : GAIN HIGH → 12 dB
4. Complete the adjustment as shown below by using the
setup menu.
MENU : SERVICE
PAGE : 06*RP DC OFFSET
ITEM : R DC OFFSET 180
Specification : Minimize A.
If the level does not change even after
moving the offset by ±5, return the
offset value that is obtained at the end
of step 2, and finish the adjustment.
5. Complete the setting of the following two items by
using the setup menu.
MENU : OPERATION
PAGE : 10*GAIN SW
ITEM : GAIN HIGH → 30 dB
MENU : SERVICE
PAGE : 06*RP DC OFFSET
ITEM : OUTPUT SELECT → G
A, C, E
B, D, F
A
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