14
4.7.4 Brightness Setting
Adjust display brightness of screen, three grades for choices: low, middle, high.
“low” means the least brightness, and “high” means the most brightness.
Note: the more bright the backlight is set, the more power consumes, and
the battery working time will be shortened. So it is set as the lowest
grade in case of high brightness being unnecessary.
Operating:
enter LCD main menu, and select LIGHT submenu, then you can
press [+] or [
-
] key for brightness.
4.7.5 Restraint Setting
Restraint function for reject clutter and promote signal to noise ratio. Height of
restraint level will be displayed by percentage from total screen height, meantime,
any wave signals lower than restraint level height will be shielded and can not be
displayed. For instance, adjust restraint level to 20%, the screen only display
signals with height more than 20%. 0% means instrument under non- restraint
condition.
Instruction: if restraint level be higher the dynamic range of instrument will be
smaller, the echo lower than restraint level will be not displayed, so it may have
omission factor for tiny signals, after use restraint function the instrument should
return to non-restraint condition.
Note: RESTRAINT
>0%, right side of screen will display red “RJ” to avoid
misoperation.
Operating:
enter CONFIG 1 main menu, and select RESTRAINT submenu, then
you can press [+] or [
-
] key to set restraint level.
