Description

Audio System

NOTE:
A = Hardwired; I = CVBS; O = LIN; P = MOST; T = Co-axial; AE = LVDS; AG = Infrared

Control Diagram - Audio System









AUDIO SYSTEM OPERATION

MEDIA ORIENTATED SYSTEMS TRANSPORT (MOST)
The components of the audio/infotainment system are all connected on the Media Orientated Systems Transport ( MOST) ring. The MOST ring is a fibre optic communications bus for multimedia applications. Audio and control information is passed around the MOST ring and can be picked up by any of the systems units. For example, radio station tuning/selection input by the vehicle user into the Touch Screen Display (TSD) is sent along the MOST ring and collected by the Integrated Audio Module (IAM) which then selects the requested radio station.
MOST technology uses a plastic optical fibre which forms a network connecting the audio and multimedia system components. Each component in the ring is connected to the plastic optical fibre through a device known as a Fiber Optical Transceiver (FOT). Each FOT has two optical connections; one connection is sensitive to light and is the input, the second connection forms the light source and is the output. The system operates by connecting the output from one FOT to the input of another FOT.
The light signals are sent in one direction only and are formed in the following way:
- Electrical signals are converted into an electrical current
- The current then drives an LED (light emitting diode) in the FOT to produce a high intensity red light
- The LED (light emitting diode) transmits the light through a fiber optic cable
- A photo diode in the FOT at the opposite end of the fiber optic cable detects the light.
The following components may be connected to the MOST ring dependant on the vehicle equipment level:
- Touch Screen Display (TSD) (MOST timing master)
- Integrated Audio Module (IAM)
- Rear Seat Entertainment (RSE) module (if fitted)
- Digital Audio Broadcast (DAB) radio receiver (if fitted)
- Satellite Digital Audio Radio Service (SDARS) (NAS only - if fitted)
- Power audio amplifier
- Instrument cluster
- Telephone control module (if fitted)
- Navigation computer (if fitted)
- Television (TV) tuner (if fitted).

MOST Ring Components (RHD (right-hand drive) vehicle shown)









MOST is a synchronized network. A timing master supplies the clock information and all other devices on the network synchronize their operation to this clock. The timing master for the MOST network on this vehicle is the Touch Screen Display (TSD). This unit also controls and manages the MOST ring and the system components.
An Optical Bus tester is used in conjunction with the approved Jaguar diagnostic system to diagnose the MOST system. The Optical Bus tester emits a visible, high intensity red light which can be connected into the ring at any point to test the ring integrity. Disconnecting a MOST connector will reveal if the high intensity red light is visible.
If a break occurs in the MOST ring, fault codes are stored in the TSD which can be retrieved using an approved Jaguar diagnostic system.

AUDIO SYSTEM DESCRIPTION

Integrated Audio Module (IAM)





The IAM is located in central position in the instrument panel, behind the Integrated Control Panel (ICP).
The IAM is a multi functional unit which has the following systems and features:
- Radio tuner
- Compact Disc (CD) player (single slot)
- Hybrid Digital (HD)
- Bluetooth(R) receiver (telephone and audio streaming) Radio (where fitted)
- 40 GB Hard drive (Navigation and audio ripping)
- USB controller (front)
- Audio AUX
- DVD player (audio and video).
The IAM is connected on the MOST ring to the other audio system components. The driver can control audio functions by using soft keys on the Touch Screen Display (TSD), steering wheel mounted audio control switches or by voice commands.
The 40 GB hard drive is used for storing the information for satellite navigation and music files. A 10GB partition is provided for storing music files. Up to 10 CD's can be loaded individually via the CD slot and the music data copied onto the hard drive.
The IAM has an integral tuner for AM/FM reception. Each audio system features auto-store, with a press and hold function to store selected channels as pre-sets. The standard search facility finds the nine strongest channels currently available, while search and manual tuning also allow channels to be stored. The IAM does not have an integral audio power amplifier, so all variants of the audio systems use a separate audio power amplifier located in the luggage compartment.
Hard Disc Drive
The integral hard drive for the navigation system removes the requirement of a separate navigation computer usually found in the rear luggage compartment. The IAM stores the navigation map data locally within the 40GB hard drive (30GB partition reserved for navigation). By storing the information in this way and processing it within the IAM, navigation display, route calculation speeds and accuracy are vastly improved. Map upgrades and software now have to be loaded directly into the IAM.
The map images are transmitted from the IAM to the TSD via a Low Voltage Differential Signal (LVDS). Turn by turn instructions are also available, these are displayed in the instrument cluster via a second LVDS link between the instrument cluster and TSD.
The IAM has the ability to load audio files and 'rip' the music onto the internal hard drive, a 10GB partition is reserved to store music. It is possible to store up to 10 uncompressed albums onto the hard drive. Only CDDA files can be loaded into the virtual changer.

File compatibility for the single slot CD mechanism includes:
- CD audio
- mp3 - (MPEG Layer III)
- WMA - (Microsoft Windows Media Audio)
- WAV - (waveform)
- AAC - (Advanced Audio Coding. Apple iTunes - only through iPod interface)

NOTE:
The CD player may take a longer time to load an MP3 disc, if there are more tracks than on a normal CD. To minimize loading time, a rigid folder structure is recommended.

NOTE:
In the event of customer complaints relating to audio quality, file compression should be taken into consideration during diagnosis.
The IAM communicates on the MOST ring with the rest of the audio system. If the IAM is replaced it must be configured as a new module using an approved Jaguar diagnostic system
Calibration of the IAM using an approved Jaguar diagnostic system enables updates to be downloaded as new technology becomes available or any fault concerns require software updates.

Audio Controls









There are several ways to control the audio system:
- Steering wheel audio switches
- Integrated Control Panel (ICP)
- Touch Screen Display (TSD)
- Voice control.
The steering wheel audio switches allow selection of audio/video source, volume control, selection of radio or TV preset, scan for radio or TV channel, scan backwards or forwards through a music track.
The ICP switches provide the same functions as the steering wheel audio switches.
The TSD provides the greatest selection of controls for the audio/visual systems. On screen soft keys allow navigation through the audio menus and selections and preferences can be programmed into the system.
Voice control is activated by pressing the steering wheel mounted voice control switch. Once activated, a command list is displayed in the instrument cluster which allows the driver to select from a number of systems for voice control as follows:
- Telephone
- Navigation system
- USB
- CD
- Radio.
A long press on the voice control switch de-activates the voice control system.
On vehicles fitted with the Rear Seat Entertainment (RSE) system, a remote control touch screen is available for rear seat passengers to select their preferences for the audio/visual systems. The remote touch screen is located in a docking station in the center arm rest and can be operated located in the arm rest or removed for remote operation. On screen menu's, similar to those used in the instrument panel mounted TSD are used to navigate through the selected source functions.

Radio Antennas
Hybrid Digital (HD) and AM/FM









HD radio does not require a dedicated antenna. It uses the existing AM/FM antennas located in the rear screen.

NOTE:
HD radio transmission depends very much on the broadcaster, not all stations will provide the HD element of the broadcast.
Digital radio transmission does not always necessarily produce a higher resolution sound. This is very much dependant on the compression rate the provider is transmitting the signal.
Digital Audio Broadcasting (DAB) Band III and DAB L-Band









The DAB L-band antenna is located in the sigma pod and is shared with the navigation system Global Positioning Satellite (GPS) antenna where fitted. The sigma pod is located internally in a central position towards the top of the rear window.
The antennas fitted to these modules MUST be 2mm from the glass when they are fixed/slotted into the Sigma pod carrier which is bonded onto the rear screen. Both the air gap and fixed position in the carrier are extremely critical to the functionality, operation and efficiency of all the sigma module antennae.









DAB Control Module









The DAB receiver is located in the LH (left-hand) side of the luggage compartment.
The DAB receiver is a dedicated tuner which is controlled by the IAM on the MOST ring. The receiver processes the signals from the DAB antennas. Digital information is transmitted on the MOST ring and processed by the IAM. The processed information is sent out to the audio amplifier converted to analogue then broadcast through the speaker system.

NOTE:
DAB audio resolution is not always better than FM. This is dependant on the compression rate being transmitted by the provider.
DAB radio is a relatively new and therefore coverage of the digital network is constantly evolving. The United Kingdom for example currently has a DAB coverage of more than 85%, although other countries may have less coverage. DAB reception coverage areas can be checked using the internet.
Before taking any diagnostic action in the event of a customer reception complaint consider that DAB reception depends on local channels/stations and their signal strength and reception is affected by tunnels, hills, tall buildings or densely tree-lined roads.
During periods of signal strength deterioration, the Jaguar DAB system is designed to notify the customer that the signal is weak. As an alternative to muting the sound, possibly replicating a fault symptom to a customer, the over-laying of a 'bubbling' sound is deliberately produced during the transmission. This sound should also not be perceived as a fault, no further diagnosis is required in this instance.

Front and Rear (if fitted) Auxiliary Panels

NOTE:
A = Front AUX panelB = Rear AUX panel









All models have an auxiliary 3.5mm mini-jack input socket and 2 USB ports in the centre cubby box. On vehicles fitted with the Rear Entertainment System (RSE) and additional auxiliary panel is fitted which has a USB port, a video input and 2 audio inputs.

Front Auxiliary Panel





The USB connectivity allows a convenient method of playing music from a range of compatible portable devices through the vehicle audio system. The front auxiliary panel is controlled through the TSD and the steering wheel switches. On vehicles with the RSE system, the rear auxiliary panel can be controlled via the RSE remote touch screen panel, in addition to the TSD and the steering wheel switches. Both systems use the vehicles audio and speaker system.
If front and rear auxiliary panels are fitted, 3 different USB devices can be connected at the same time and each can be controlled independently through the TSD, RSE remote touch screen and the steering wheel controls.

NOTE:
Due to a large variety of USB devices available and continual development in this sector it is impossible to guarantee compatibility with all devices.

WhiteFire(R) Digital Wireless Headphones and Transmitter









In addition to the cabin audio speaker output, if the high line audio or premium audio system is fitted, these systems feature 3 additional audio channels which can be accessed through the digital wireless headphones.
The premium headphone system includes Dolby(R) headphone surround when listening to the DVD source. It is possible to install the vehicle with up to 3 sets of headphones. Each headset contains 2 AAA batteries.

NOTE:
There is no docking station to store the headsets, therefore charging of the batteries is not supported via the vehicles electrical system.
The controls located on the earpiece include the power switch, volume control and channel browse button. To select a different channel press the browse button, conformation via an audible beep can then be heard followed by the audio transmission on that channel.