1998 Chevrolet Astro Owner's Manual - Page 172

SCV: Your system has a feature called Speed-Compensated-Volume (SCV). With SCV, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Move thecontrol ring behind the upper knob to the right to adjust the SCV. Then, as you drive, SCV automatically increases the volume, as necessary, to overcome noise at any particular speed. The volume level should always soundthe same to you as you drive. If you don't want to use SCV, turn the control all the way down. Each notch on thecontrol ring allows for more volume compensation at faster vehicle speeds. Finding a Station AM-FM: Press this button to switch between AM, FMl and FM2. The display will show your selection. TUNE: Press this knob lightly so it extends. Turn it to choose radio stations. Push the knob back into stored its position when you're not usingit. SEEK: Press the right arrow totune to the next higher station and the left arrow to tune to next lower station the and stay there.The sound will mute while seeking. SCAN: Press and hold SEEK for two seconds until SCAN appears on the display. SCAN allows you to listen to stations fora few seconds. The receiver will continue to scan and momentarily stop at each station until you press the button again.The sound will mute while scanning. PUSHBUTTONS: The six numbered pushbuttons let you return to your favorite stations. You can set up to 18 stations (six AM, six FMl and six FM2). Just: 1. Turn the radio on. 2. Press AM-FM to select the band. 3. Tune in the desired station. 4. Press AUTO TONE to select the setting you prefer. 5. Press and hold one of the six pushbuttons. The sound will mute. When it returns, release the button. Whenever you press that numbered button,the station you set will return and the tone you selected will be automatically selectedfor that button. 6. Repeat the steps for each pushbutton. 3-20