Jaguar XJ (2008 year). Service manual — part 71

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Radio

GENERAL INFORMATION

Reception

FM reception offers the advantages of low
noise interference, minimal distortion,
wide dynamic range, extended frequency
response, and is usually broadcast in
stereo. FM frequency waves are however
relatively short and travel in a straight line
and can therefore be impeded by
obstructions, which may adversely affect
reception in certain parts of the country.
This is a condition known as Multipath
Interference.

Whilst FM reception generally provides
better quality sound, AM reception or
Medium Waveband (MW) may prove
superior in remote areas not covered by
the shorter range FM transmitters.

When experiencing poor FM reception,
background noise can be reduced by
pressing the MODE button, selecting
TREBLE and reducing the treble setting.

Radio Broadcast Data Systems (RBDS)
and Traffic Announcements (TA)

Jaguar sound systems are equipped with
Radio Broadcast Data System (RBDS)
which assists in locating and remaining
tuned to a selected radio station. When
tuned to certain stations on the FM
waveband, the radio decodes signals
transmitted, to provide the following
functions (dependent upon the service
available):
• When RBDS is selected the station

name is displayed in eight characters.

• Automatic retuning to follow network

stations:

RBDS provides fully automatic radio
tuning for network stations. It tunes to
a signal not a frequency. RBDS will
locate the strongest signal available
for a given station.

• RBDS will automatically switch

frequencies (AF Switching) as
necessary. This function can be
toggled off and on by pressing and
holding the BAND button.

• RBDS Station/Programme type

display and search:

RBDS displays information on the
type of material broadcast by the
station or programme that is on e.g.
News, Classical, Rock etc. In
addition to this function, the radio can
search for a selected programme
type.

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• RBDS Priority Programme Type auto

retuning (where broadcast):

Similar to Traffic Announcement this
can be selected to interrupt and
switch to the selected programme
type e.g. News, for its duration.

• Local radio station Traffic Information

(where broadcast):

RBDS provides travel information
relevant to the vehicle location. On
learning of a traffic problem, the
authorities inform the nearest local
radio station.

The traffic announcement (TA) is then
broadcast by transmitters in the
relevant area.

Provided TA has been selected, traffic
announcements will interrupt radio or CD
play, on all equipment with the RBDS
feature. If the volume control is set at
minimum it will automatically increase to
an audible level for the duration of the
traffic news flash.

When the traffic announcement has been
completed, the system reverts to the
driver’s original listening choice and
volume setting.

RBDS operation

To activate RBDS, press the TA
button and hold for at least two
seconds until RBDS ON is
displayed.

To deactivate RBDS, press the TA button
and hold until RBDS OFF is displayed.

With the radio tuned to an RBDS station
and RBDS activated, the radio gathers
RBDS information and displays the
service name/data.

If the radio is not tuned to an RBDS
station, it will remain on that station and
display the frequency, and RBDS will
remain on in readiness for a signal.

When listening to a national network
station, or a station that broadcasts on
more than one frequency, the radio will
retune to the strongest available signal
(AF Switching). This ‘network following’
will continue throughout the journey.
(Unselected presets will also receive new
frequency information, if appropriate.)

When RBDS data is lost and no
alternative frequency signal is available,
the radio will stay on station, the display
shows the frequency only and RBDS
remains on in readiness for the signal to
recover.

If the RBDS function does not respond
correctly, see RBDS troubleshooting
guide on page 289.

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TA operation

To activate TA: Press the TA button
momentarily (less than two seconds).

TA will appear in the display. The radio
then checks that the station has RBDS TP
(Traffic Programme); indicated by TP at
the top of the display. If TP is not available
on the current station, the display will
show TP SEEK while it searches for a
station that does have it.

If a TA station is not available, a beep is
sounded and TA is removed from the
display.

With TA activated, traffic announcements
will interrupt radio or CD play. If set at a
minimum, the volume will increase for the
announcement, returning to normal
setting afterwards. When receiving, the
display will show TRAFFIC INFO.

To deactivate TA: Momentarily press TA.

Preset TA volume

When the radio is set to minimum volume
and a traffic announcement occurs, the
volume is raised to a preset level. This
level can be adjusted by pressing and
holding the MODE button for more than
two seconds, then setting the volume
level (which is displayed) between 1 (min.)
and 6 (max.) by turning the volume control
knob.

Programme Type (PTY)

(Where broadcast)

This has two functions: To display
current station programme type
and to select a programme type
and retune to it.

Momentarily press the PTY button to
display the current station programme
type. Use the tuning buttons to cycle
through the available programme types,
press the PTY button again to activate a
search for the selected programme type.
If there is a station with the correct PTY
then the radio will retune to it. If not, the
radio will indicate NO PTY and return to
the current station.

Priority Programme Type (PPTY)

Functions as an interrupt or as a ‘PTY
Following’.

Press and hold the PTY button to activate
the selected priority programme type,
PPTY. The radio will now wait for RBDS
information to indicate that a station has
changed its programme type, e.g. to
NEWS. The radio will now retune to the
new station for the duration that it remains
on that programme type.

If the current station is already on the
selected priority programme type, then
when this station is lost, the radio will
attempt to find another with the correct
programme type.

To cancel Priority Programme Type, press
and hold the PTY button, the PTY
indicator will clear from the display.

Note: TA and PPTY interrupt feature is
also available in CD and audio modes.

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TA and priority PTY interrupt skip

Interruptions for traffic announcements,
news or other selected priority
programme types, can be skipped by
pressing TA during the interrupt. The
radio returns to the previously selected
audio source.

Note:

•

Interrupt skip will not cancel activation
of TA or PPTY and it will remain ready
for the next interrupt.

•

TA, PTY and PPTY features are reliant
upon the broadcast information from
radio stations, and may be much
better in some areas than others.

PTY31-alarm (where broadcast)

When using the radio with RBDS
selected, a PTY31-ALARM service will
operate, to alert on any crises of major
national importance. When such a
broadcast is made, ALARM will appear in
the audio display.