JRC JMR-7230-S3 Instruction Manual page 89

Pattern button name
Pattern5
Displays the pattern for checking the communication quality for VDR.
Pattern6
Displays the pattern for checking the communication quality for VDR.
Gray Scale
Displays the grey scale pattern for checking the monitor brightness
adjustment.
Grey scale patterns can be identified with brightness in day/night
mode. By adjusting the monitor brightness to facilitate identification of
grey scale patterns, the optimum brightness can be set. The brightness
in night mode can also be adjusted in the same way.
Use the Day/Night button on the right Toolbar for switching between
the day and night mode.
For the details of the Day/Night button, refer to "2.2.1 Right toolbar".
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21-29 Section 21 Maintenance & Inspection
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