Uniden ATLANTIS 250 English Owners Manual - Page 13

Operation • See "Controls and Indicators" (page 2) for button, knob, and key positions. • When you turn On your ATLANTIS 250 just after purchasing, it is automatically tuned to channel 16, the United States Coast Guard frequency for distress, safety, and calling. • When you press any button (except PTT), a short tone sounds. Turning On the Unit and Setting Squelch 1 Before you turn On the unit, turn the squelch (SQ) knob fully counterclockwise. SPKR MIC SQ VOL 2 Then, turn On the unit by turning the Volume/Power (VOL) knob clockwise until you hear a hissing sound. 3 Turn the SQ knob clockwise, just until the hissing sound stops. Use the knob to adjust Strong Signals to the desired squelch level. Think of the squelch control as a frequency gate which Medium Signals controls access to weak or strong signals Weak Signals depending on its setting. Noise • To listen to a weak or distant station, turn the knob counterclockwise. If reception is poor, turn it clockwise to cut out weak transmissions. • If the squelch control is adjusted so that you continually hear a hissing sound, the unit will not scan properly. 4 To turn Off the unit, turn the VOL knob counterclockwise until it clicks. 11