... Auto Mode for hands-off operation4) Variety of display modes: A-scope, bottom-lock expansion, marker ... background color) according to echo intensity. Monochrome display is also available. The background color is selectable ... Auto ModeAutomatic adjustment of range and gain(8) Display ModeHigh Frequency (200K),Low Frequency (50K), Dual ... , 0.4, 0.8, 1.5, 3.0TX Rate(pulse/min) 600, 600, 600, 375, 187, ...