Auto Iris Adjustment - Sony BVP-500 Maintenance Manual

4-18. Auto Iris Adjustment

Note:
Perform this adjustment, if necessary, to suit the custom-
er's preferences.
Equipment
: Waveform monitor
Test Point
: MONITOR connector
Object : Grayscale chart
Preparations:
• IRIS AUTO button/MSU operation panel → ON (Lights)
• KNEE OFF button/MSU operation panel → OFF (Lights)
• Connect the waveform monitor to the MONITOR
connector.
• S650 (MONITOR SELECT)/IF-538 panel → VBS
• Shoot the grayscale chart so that the chart frame is
aligned with the underscanned monitor frame.
Adjustment Procedures:
1. Adjust the auto white balance.
WHITE button/MSU operation panel → ON (Lights)
2. Set the DISPLAY switch/rear panel to MENU while
pushing up the MENU SELECT switch to ENTER.
3. Set the menu as follows and adjust the APL ratio using
the MENU SELECT knob/switch.
MENU : Operation
PAGE : Auto Iris/Auto Knee (?6)
ITEM : APL Ratio
Specifications : Adjust the operation mode
depending on the application.
Note
: Automatic iris operation mode
setting can be done from the
average level to peak-to-peak
level of the video signal.
99 → average level
-99 → peak-to-peak level
4. Set the menu as follows.
MENU : Operation
PAGE : Auto Iris/Auto Knee (?6)
ITEM : Iris Override→Off
BVP-500
BVP-500P
5. Adjust the auto iris level using MENU SELECT knob/
switch.
MENU : System config
PAGE : Iris (S6)
ITEM : Level
Specifications: A = 100 ±2 IRE (for NTSC)
A = 700 ±14 mV (for PAL)
(Waveform Monitor)
4-18. Auto Iris Adjustment
4-21