AM Mode through Radio/Audio System Operaton-Cassette Tape Player
RADIO/AUDIO SYSTEM DESCRIPTION AND OPERATIONRADIO/AUDIO SYSTEM DESCRIPTION
The following audio systems are available for the 2002 Corvette:
RPO ULO
- Radio AM/FM stereo
- Seek/scan
- Auto reverse music search cassette
- Auto tone
- Clock
- Electronically tuned receiver (ETR)
RPO UNO
- Radio AM/FM stereo
- Seek/scan
- Compact disc
- Auto tone
- Clock
- Electronically tuned receiver (ETR)
RPO U1S
Remote compact disc changer (available with ULO or UNO)
Audio System Components - Coupe:
AUDIO SYSTEM COMPONENTS - COUPE
Audio System Components - Convertible:
AUDIO SYSTEM COMPONENTS - CONVERTIBLE
Audio System Components - Hardtop:
AUDIO SYSTEM COMPONENTS - HARDTOP
The following is included in each audio system:
- A radio control located in the instrument panel (I/P)
- A electronically tuned radio reception
- The following six speakers:
- Four door mounted speakers
- Two quarter mounted speakers
- A fixed antenna system (Hardtop)
- A diversity (dual) antenna system (Coupe)
- A power antenna system (Convertible)
- A THEFTLOCK(R) radio theft-deterrent system
The Electronically Tuned Receiver (ETR) utilizes a programmer and synthesizer to provide optimum sound reproduction. The ETR incorporates an electronic memory for preselected station and digital clock function. Reset the memory whenever the battery is disconnected.
Each system has a vacuum fluorescent (VF) display that coordinates with the other instrument panel (I/P) displays. The Body Control Module (BCM) controls the dimming of the display based on inputs from the I/P cluster which reads adjustments of the I/P cluster dimmer switch (rheostat). The Light Emitting Diode (LED) and the back lighting of the radio face is done with incandescent light powered directly by the I/P cluster dimmer switch (rheostat).
AM MODE
The range of most Amplitude Modulation (AM) stations is greater than FM stations. This is especially true at night. The AM band tuning range is 530 kHz to 1710 kHz.
DELCO-BOSE SYSTEM
The Delco-GM/BOSEr audio system is an advanced automotive sound system that is tuned to the interior of the vehicle. The six speakers in four locations,two amplifiers in the forward speaker locations, and an amplifier incorporated into a signal processor are designed to deliver acoustically customized sound.The following are considered in the customization of the sound:
- The shape of the windows
- The location of the windows
- The type of upholstery
- The type of carpeting
- The position of the passengers
The result is a carefully calculated distribution of sound. The sound does not seem to come only from the speaker which results in a resemblance of a live concert performance.
When the system is turned ON the Bose(R) relay is energized through the radio receiver. The relay contacts close and apply current from the Bose(R) fuse to the two door mounted speaker/amplifier assemblies. This causes a slight delay from the time the system is turned on, until the sound is heard.
Loud bass volume is possible while maintaining sound clarity. Both forward speaker assemblies contain a specially designed amplifier and woofer (speaker) to assure clear sound reproduction at high volume levels. The following are some features of the system:
- Full-time loudness control
- Built-in Dolby(R) B tape noise reduction
- Direct and reflected sound design
- Front and rear tuned speaker locations and front location amplifiers with an overall system power of 252 watts
COMPACT DISC PLAYER
The Compact Disc (CD) player provides exceptional clarity and provides low background noise through digital reproduction. A selectable audio compression circuit processes the audio signal. This processed audio signal brings quiet and loud music passages into a more desirable listening range. This is especiallyuseful in the automotive environment. When using compression, a demanding recording can be listened to without continually adjusting the volume.
The automotive environment can be a difficult one for sophisticated electronics. The CD player design takes into account many of the problems seen in automobiles. The player is designed to protect its optics from humidity and from excessive heat by automatically shutting down and ejecting the disc or displaying ERR. A special nylon filter across the disc opening protects the disc mechanism's optics from interference caused by moisture, dust and sunlight.
The loading system gently draws the disc into the mechanism. An ejected disc extends out almost halfway allowing the user to easily manage the disc. The loading system prevents damage to the disc if insertion of a second disc is attempted.
The use of a laser beam to read digital information means the disc will rarely wear out. There is no physical contact with the disc. An occasional skip due to rough roads will not damage the disc.
REMOTE COMPACT DISC CHANGER
The remote compact disc (CD) changer is available with either the UL0 or the UN0. The remote (CD) changer is located in the cargo area in the center storage compartment. This CD changer features a 12 disc, removable magazine, and operation through the radio control head. The CD changer includes many of the quality design components found in the I/P mounted CD player (UN0).
ANTENNA SYSTEM (COUPE)
(Convertible Models have a Power Antenna)
The Corvette Coupe features a diversity antenna system designed to deliver the best radio signal reception possible.
Two antennas are used to form a diversity system. The primary antenna is attached to the rear lift window similar to a defogger grid. This antenna is used to receive both AM and FM signals. The secondary antenna is attached to the windshield in the same manner as the primary antenna. This antenna is used to receive only FM (diversity) signals. The antenna reception signals are sorted by a reception processing module. The module then sends the clearest, strongest signal to the radio control.
Multipath or signal flutter is the quickly fading in and out of FM radio signal reception. Multipath or signal flutter most often occurs in down-town areas or wherever large obstructions are present. A radio signal reflects off of buildings at various angles. When one signal crosses paths with a same signal (at a different angle) they will cancel each other out. The signal will be received and then not received very rapidly by a vehicle audio system. This causes a fluttering effect to be heard through a vehicle's speakers. With the Corvette diversity antenna system one of the two antennas will virtually always receive a strong signal and widely limit multipath.
RADIO THEFT-DETERRENT FEATURE
Corvette radios come with the THEFTLOCK(R) radio security system. THEFTLOCK(R) is designed to discourage theft of the radio by using a secret code to disable all radio functions whenever battery power is removed.
The radio feature THEFTLOCK(R) may be used or ignored. If ignored, the system plays normally and the radio is not protected by this feature. If THEFTLOCK(R) is activated, the radio will not operate if stolen.
When THEFTLOCK(R) is activated, the radio will display LOC to indicate a locked condition anytime battery power is removed. If the system loses battery power for any reason the radio must be unlocked with the secret code before it will operate.
RADIO/AUDIO SYSTEM OPERATION-RADIO CONTROLS
PWR-VOL Control
The system will turn ON with a momentary delay with the ignition in the ON or in the ACCESSORY position and rotating the upper knob clockwise. The station frequency is displayed and then the time of day is displayed. Rotate the knob clockwise to increase the volume. Rotate the knob counterclockwise to decrease the volume.
Recall (radio) Control
When the system is ON pressing RECALL will display (or recall) the station being played. When the ignition is OFF pressing RECALL will display the time of day.
SCV (Speed-compensated Volume) Control
The SCV (Speed-Compensated Volume) ring is located behind the PWR-VOL control knob. Rotating the ring up or down will automatically cause the volume to raise and lower as the speed of the vehicle increases and decreases. The top position has a higher maximum volume. The top position gets louder faster than the lower positions. When the system is ON the SCV will display. Rotating the ring all the way down will turn the SCV system OFF. Subtle changes in volume should not be noticeable to the driver when the system is working properly.
Bass Control
Push the BASS Control knob to release it. Rotate the knob to the right to increase bass. Rotate the knob to the left to decrease bass. Push the knob back in to store it when not adjusting.
TREB Control
Push the TREB knob to release it. Rotate the knob to the right to increase treble. Rotate the knob to the left to decrease treble. Push the knob back in to store it when not adjusting.
BAL CONTROL
Push the BAL Control knob to release it. Rotate the knob to move sound between the right and left speakers. Push the knob back in to store it when not adjusting.
Fade Control
Push the FADE Control knob to release it. Rotate the knob to move sound between the front and the rear speakers. Push the knob back in to store it when not adjusting.
Tune Control
Push the TUNE Control knob to release it. Rotate the knob to choose desired radio stations. Push the knob back in to store it when not adjusting.
Seek (Radio) Control
Press SEEK > or < SEEK and the radio will tune to the next higher or the next lower station and stay there.
AM/FM (Radio) Control
Press AM/FM to receive AM, FM1, or FM2 band. The selection will appear on the VF display.
P Scan Control
Press P SCAN to hear each of the present stations for a few seconds. Press P SCAN again to stop at a chosen station.
Auto Tone Control
Press AUTO TONE to choose preset treble and bass equalization settings designed for one of the following:
- ROCK
- NEWS
- POP
- CLASSICAL
- JAZZ
Each time AUTO TONE is pressed, another setting will appear on the display. When MAN (manual) appears the control of the tone will be back to the treble and bass knobs.
ST (Stereo) Indicator
ST will appear on the VF display whenever a FM stereo broadcast is selected.
Push Buttons (Numbered)
A total of 18 stations can be preset. Six AM stations can be preset. Six FM1 stations can be preset. Six FM2 stations can be preset. The following is the preset stations procedure:
1. Tune in the desired station (in the desired band; AM, FM1, or FM2).
2. Press and hold one of the six push buttons for 5 seconds. The station will fade out and then return when set. The present station will return whenever that button is pressed.
Repeat these steps for each push button.
Clock
The time will appear on the VF display. To set the time perform the following procedure:
1. Press and hold HR (hour) until the correct hour appears.
2. Press and hold MIN (minute) until the correct minute appears.
There will be a 2-second delay before the clock goes into the time set mode.
Press RECALL to display the time when the ignition is OFF.
RADIO/AUDIO SYSTEM OPERATION-CASSETTE TAPE PLAYER
This cassette tape player is designed to work best with tapes that are 30 minutes long on each side. Longer tapes are much thinner. Thinner tape may not work well in this player.
This tape player has an automatic reverse feature. The automatic reverse feature automatically reverses the tape direction at the end of a side. Pressing PROG while the cassette tape is playing will reverse the tape direction.
To play a cassette tape perform the following procedure:
1. The ignition must be in the ACCESSORY or ON position.
2. Turn ON the radio.
3. Insert the exposed tape side of the cassette tape squarely through the tape door. If the tape is not inserted squarely no sound or a garbled sound may be heard. Press EJECT to remove the tape if no sound or a garbled sound is heard. Reinsert the exposed tape side of the cassette tape squarely through the tape door.
4. The radio will automatically turn OFF and the cassette tape will play. An arrow will appear in the VF display to indicate the direction of the play.
The following controls will function when a cassette tape is playing the same as they do during radio operation:
- PWR-VOL
- SCV
- BASS
- TREB
- BAL
- FADE
- AUTO TONE
Refer to Radio/Audio System Operation - Radio Controls.
To stop play of a cassette tape perform one of the following:
- Turn the ignition OFF. The cassette will remain in the player. The cassette will resume play at the point where it stopped.
- Turn the radio OFF. The cassette will remain in the player. The cassette will resume play at the point where it stopped.
- Press AM/FM to stop cassette play and to switch to radio. Press TAPE AUX to switch back to playing tape.
- Press EJECT to remove cassette from the player (stopping play) and switch to radio.
FWD (Tape) Control
Press FWD to rapidly advance the tape. Press FWD again to stop the tape advancing. The radio will play during this operation.
REV (Tape) Control
Press REV to rapidly reverse the tape. Press REV again to stop the tape reversing. The radio will play during this operation.
NEXT (Tape) Control
Press NEXT to play the next selection instead of waiting for the current selection to finish. For NEXT to work properly the tape must have at least three seconds of silence between each selection. The radio will pay during this operation.
PREV (Tape) Control
Press PREV to replay the current selection. For PREV to work properly the tape must have at least three seconds of silence between each selection. The radio will play during this operation.
SEEK (TAPE) CONTROL
Press SEEK > to play the next selection instead of waiting for the current selection to finish. Press < SEEK to replay the current selection. The radio will play during these operations.
PROG Control
Press PROG to switch from one side of tape to the other side of tape. To reverse the direction of play.
AM/FM (Tape) Control
Press AM/FM to stop cassette play and switch to radio.
TAPE AUX (Tape) Control
Press TAPE AUX to stop cassette play and switch to radio. If the remote compact disc changer (U1S) is included in the vehicle sound system, pressing TAPE AUX a second time will allow it to play.
DOLBY(R) Control
Press Dolby(R) to reduce background noise. The Dolby(R) symbol will appear in the VF display.
EJECT (Tape) Control
Press EJECT to remove cassette from the player. The radio will then play (when the power is on). EJECT will work with the ignition ON or OFF.
CLN (Clean) Indicator
This message may appear on the VF display. If it does appear on the VF display the cassette player needs to be cleaned. Clean the player as soon as possible to help prevent permanent damage to tapes and to the player itself. Refer to Cassette Player Care and Cleaning.
To reset the CLN indicator after the player has been cleaned perform the following procedure:
1. Press and hold EJECT for five seconds.
2. "---" will appear on the VF display to verify that the indicator is reset.