Digital audio broadcasting

Transcription

1 Digital audio broadcasting GENERAL INFORMATION Digital radio reception E94094 is very different from normal radio in both operation and sound quality. The DAB network is designed to provide near quality from radio broadcasts. In most locations DAB signals are available without hiss, crackle, pop or interference, and no fading or overlap. can significantly increase the number of radio channels/stations available. The DAB signals are transmitted to most major cities, towns and motorway networks. Radio signals travel in a straight line so large obstacles, such as tall buildings, can shield the vehicle from the signal, causing temporary loss of reception (known as dead spots). Digital radio is transmitted from regional transmitters. Some local channels are not available outside the range of their transmitters. If you want to listen to local channels as you move around the country, use the auto-tune function (AUTO) to build new channel lists. For more information on the auto-tune function. See CHANNEL AUTOMATIC TUNING (page 262). Note: If any auxiliary electrical equipment is connected to the vehicle, then this may reduce the sound quality. 258

2 Ensembles Unlike radio, DAB transmits several channels/stations on a single frequency. A group of channels is known as an ensemble. Ensembles may consist of six or more channels (national or local). Some may have sub-channels offering several listening options. When scrolling through the channels the sub-channels will appear in order, and can be selected in the same way as the channels. If reception is lost when the vehicle is in motion select AUTO to build a new list of ensembles. The table below provides an example of the ensembles, channels and sub-channels available in one location. Ensemble Channel/station Sub-channel 1 Sub-channel 2 First ensemble Channel/station 1 Channel/station 2 Sub-channel Channel/station 3 Channel/station 4 Channel/station 5 Channel/station 6 Sub-channel Sub-channel Channel/station 7 Channel/station 8 Channel/station 9 Second ensemble Channel/station 1 Channel/station 2 Channel/station 3 Channel/station 4 Channel/station 5 Channel/station 6 Third ensemble Channel/station 1 Channel/station 2 Channel/station 3 Channel/station 4 259

3 AUDIO CONTROLS 1 12:26 pm text JAG Touch-screen. See TOUCH-SCREEN (page 101). 2. /off and volume control. 3. SOURCE button. Press repeatedly to select the next available audio source: FM1, FM2, AM, DAB1, DAB2, DAB3,, ipod, USB, Auxiliary. 4. Seek up. Short press to find the next channel. Long press (two seconds) to find next available ensemble. 5. Seek down. Short press to find previous channel. Long press (two seconds) to find previous available ensemble. Steering wheel controls JAG Rotate up or down to increase or decrease the audio volume. 2. Rotate and release to scroll through channels. Rotate and hold for two seconds to select next available digital ensemble. 3. Press the SOURCE button repeatedly to scroll through the available audio sources FM1, FM2, AM, DAB1, DAB2, DAB3,, ipod, USB and Auxiliary input. 4. Press to mute the audio unit. This button is also used to start, answer or end calls in phone mode and to start a Voice session. 260

4 DISPLAY OPTIONS Touch-screen information panel Se Note: The display can also show or Ensemble information if you have selected one of these options under DAB text on the menu. See SETTINGS (page 266). text Many digital channels transmit additional text (DLS, Dynamic Label Segment) to accompany a broadcast. For safety reasons, this text does not scroll across the screen. 1 2 text JAG1392 text JAG1393 The first 16 characters of text are displayed (1). If you want to read the full text, you must select the additional text button (2). 1. DAB band indicator. 2. TA-FM is displayed if the FM traffic option is enabled. See SETTINGS (page 266). 3. The arrow icon indicates that subchannels are available under the current channel. SubCh is displayed if a subchannel is tuned to. 4. Link is displayed if the Link DAB option is enabled. See SETTINGS (page 266). 5. Dolby Prologic II surround sound indicator. 6. Channel name. 7. DAB-i indicates that DAB Announcements are enabled. JAG1394 DAB radio text The latest news headlines from BBC Radio 2. The text pop-up screen displays all 128 characters of text. This text may change periodically, if the broadcaster chooses to do so. To remove the pop-up screen, briefly touch it. 261

5 CHANNEL AUTOMATIC TUNING Note: When you first use the, you will be unable to listen to any digital broadcasts until you have completed the auto-tune process. Ensemble list Channel list Subchannel list Channel data JAG1395 text Digital1 Network EMAP Leeds MXR Now Middlesbrough Auto-tune In DAB mode, select, then select Auto-tune to start automatic tuning and build a list of all the digital ensembles and channels that are available in your region. While automatic tuning is running, the message Auto-tuning will be displayed on the touch-screen, along with a percentage complete. When tuning is complete, the first channel found will start playing. Note: The auto-tune process can take longer than one minute to complete. To update the list of local channels when you move to a different region, select Auto-tune again. You can also add local channels as presets to minimise the need for auto-tuning as you move location. CHANNEL OPTIONS To receive digital broadcasts, short press the SOURCE button repeatedly to toggle between the available sources, or briefly touch the DAB Radio button on the touch-screen. See AUDIO CONTROLS (page 260). Choose DAB1, DAB2 or DAB3 to receive digital radio broadcasts. The three DAB sources enable you to preset up to 18 different channels. See PRESET BUTTONS (page 265). The channel that was last played on your chosen digital source will be selected for playback automatically. Note: If this is the first time you have used DAB radio, you must first build a list of available channels using the auto-tune function. Digital radio channels are organised into groups called ensembles. Some channels may sometimes provide one or more subchannels. 262

6 JAG1396 TA-FM Link DPLII DAB1 No reception If the digital radio signal is lost or the system takes time to tune in to a channel, then the display screen will show the message No reception. The problem may be caused by a temporary problem, such as buildings or trees blocking the signal, or it might be a problem with the broadcast service operator. Try tuning to an alternative channel and return later to see if the problem has been resolved. If you are unable to tune to any other channels, switch off the audio unit and then try again. Finding a channel JAG1397 TA-FM Link DPLII DAB1 No reception TA-FM Link DPLII text Briefly touch one of the channel seek buttons to select the next available digital channel. The seek up button selects the next channel, the seek down button selects the previous channel. Note: If the next or previous channel is in a different ensemble, then there will be a pause before the channel is located. The message Searching... is displayed on the screen. the touch-screen, if channels have been preset, select one of the six preset buttons to start playing that channel. If no channel has been preset, the button will display ---. Finding a subchannel JAG If subchannels are available under the current channel, the subchannel arrow icon (1) is displayed at the top of the touch-screen and the Subchannel button is enabled. To access the subchannels, select the downward-pointing arrow (2). Select the seek buttons (3) to find the next/previous subchannel. To return to the channel tier, select the upward-pointing arrow. Note: When you select and play a subchannel, the subchannel icon is replaced by SubCh. Note: You cannot store a subchannel as a preset. Note: If you select the preset button for the channel containing the subchannel you are currently playing, you will be returned to the channel

7 Finding an ensemble Touch and hold (two seconds) the seek buttons to find the next or previous ensemble. See AUDIO CONTROLS (page 260). After a few seconds pause, the first channel in the ensemble found will start playing. The menu enables you to view lists of available ensembles, channels and subchannels. You can also perform searches based on programme type (). Select to display the menu. Auto-tune Select Auto-tune to build a list of available ensembles and channels for your current location. See CHANNEL AUTOMATIC TUNING (page 262). Ensemble list Ensemble list Channel list Subchannel list Channel data JAG1399 Digital1 Network EMAP Leeds MXR Now Middlesbrough Auto-tune Subchannel list Select Subchannel list to display a list of any subchannels available for the currently tuned channel. If no subchannels are currently available, then the Subchannel list option is disabled. If the maximum five subchannels are available, then use the arrows to scroll through the list. Channels are categorised by the broadcaster as belonging to a programme type () category. You can display a list of channels organised according to their category. Select to display a list of categories that contain channels. Select a category to display a list of channels in that category. Select a channel name to play that channel. Briefly touch one of the seek buttons repeatedly during the first ten seconds of broadcast, to cycle through all channels contained in the category that you chose. Stop touching the seek button when you have found a channel you want. Channel data Select Channel data to display technical data relating to the currently-tuned channel. The data listed is as follows: Channel name, Ensemble name, Bit rate (kbits/s) and level. Select Ensemble list to display a list of all available ensembles. Select an ensemble name in the list to display a list of channels in that ensemble. Select a channel name to tune that channel. Channel list Select Channel list to display a complete list of all channels in all available ensembles. Select a channel name to tune that channel. 264

8 PRESET BUTTONS Storing channels as presets JAG1400 text Store up to eighteen digital channels (six each on DAB1, DAB2 and DAB3) using the numbered preset keys. Follow the procedure below to store channels as presets. 1. Search for and start playing the channel you want to preset. 2. Touch and hold (two seconds) the preset button on which you want to store the current channel. output is muted for a further two seconds while the channel is stored and a confirmation message is displayed. 3. Repeat steps 1 and 2 for each channel that you want to store as a preset. Note: You cannot store a subchannel as a preset. If you try to store a subchannel, you will store the channel to which the subchannel belongs. Recalling a preset channel JAG1401 DAB1 BBC Radio1 text Make sure that you have selected the appropriate digital source (DAB1, DAB2 or DAB3) and then briefly touch the preset button you require. The channel you have selected will start to play automatically. Home Climate Phone Navigation Vehicle JAG1402 Seek External No channel found 12 C Left DAB 1Right Preset C 21.5 C TA-FM DAB-i Radio 98.9 FM1 BBC R1 TP TA Valet Note: If you try to recall a channel that has previously been stored as a preset, but is now unavailable or invalid, the message No channel found is displayed. You must choose another channel. 265

9 SETTINGS Announcements Clear all Select FM traffic Link DAB DAB text Ensemble text JAG1403 In DAB mode, select. JAG1405 To display the full list of announcement types, touch Select. Announcements Clear all Select Alarm FM traffic Traffic Link DAB Select up to four options Transport flash Clear all DAB text Ensemble Warning services News JAG1404 Select. Note: If is selected once, but no action is taken for a further ten seconds, the system will exit the menu automatically. Announcements You can select up to four types of announcement from a list of eleven, for example, News, Area/Weather, Traffic and Alarm. When a DAB announcement is broadcast, it will interrupt normal play for the duration of the announcement. Note: The Alarm announcement type, broadcasts information concerning crises of national or international importance. JAG1406 Select an announcement type to enable it, select it again to disable it. If you want to clear all enabled types, select Clear all. To scroll through the list, select the arrow buttons. Note: If you have already selected four announcement types, you will be unable to select further types. 266

10 FM traffic The FM traffic option detects the presence of local traffic announcements on FM stations. As soon as an announcement is received, radio reception or play will be interrupted. At the end of the announcement, radio or play will resume. Announcements Clear all FM traffic Link DAB DAB text Ensemble Select Announcements Clear all Select JAG1408 JAG1407 FM traffic Link DAB DAB text Select or to enable or disable the FM traffic option. Note: The audio unit switches to an FM broadcast for the duration of the announcement, so there may be a temporary loss of sound quality. Link DAB Regional ensembles containing a list of local digital channels are broadcast by a variety of regional providers. For example, the Leicester and Coventry regions in the UK are currently supplied by Now Digital, whereas Birmingham is supplied by CE Digital. A channel (for example, Chill) in two different regional ensembles will share an identification if broadcast by the same provider (for example, Chill Coventry and Chill Leicester). If channels are being broadcast by different suppliers, then they will not share the same identification (for example, Chill Coventry and Chill Birmingham). Ensemble If you move from one region to another and Link DAB is enabled, the will attempt to retune to a channel with the same identification in a different ensemble. If the signal strength for a local channel falls below an acceptable level, the audio unit will automatically search other available ensembles for another channel with the same identification. If an alternative channel is found in another ensemble that is also in your current channel list, then the new channel is tuned automatically after a few seconds. If a channel is not found after a few seconds, then No reception is displayed on the screen. The word Link is displayed at the top of the touchscreen to indicate that Link DAB is enabled. 267

11 DAB text The DAB text option controls the type of information that is displayed on the screen when a channel or subchannel is playing. Announcements Clear all FM traffic Select Announcements Clear all Select Link DAB DAB text Ensemble FM traffic Link DAB DAB text Ensemble JAG1409 Select Ensemble to display the name of the ensemble to which the current channel belongs. Select to display the name of the programme type to which the current channel belongs. Select to display only the channel name. DAB country If you move the vehicle to a different country, you can change DAB Country options to make sure that you receive the best possible reception and sound quality. Note: If you have already selected a DAB format, then the DAB country option is disabled. Format list JAG1410 DAB Country: Spain DAB Format: Band III Spain Sweden Switzerland Taiwan Turkey Change Change Select Change to display a list of countries where DAB services are available. Select the country name to enable it. Note: When you change the DAB country, the audio unit will automatically start auto-tuning. If you Cancel the auto-tune, the country setting will remain changed but you may not have access to all available ensembles for that country. See CHANNEL AUTOMATIC TUNING (page 262). Note: This option is disabled when the vehicle is moving 268

12 DAB format Format list Spain Sweden Switzerland Taiwan Turkey Note: When you change the DAB format, the audio unit will automatically start auto-tuning. If you Cancel the auto-tune, the format setting will stay changed but you may not have access to all available ensembles for that format. See CHANNEL AUTOMATIC TUNING (page 262). Note: This option is disabled when the vehicle is moving Band III Country list Band L Band III and Band L L Band Canada L Band Canada and Band III JAG1411 Different regions or countries may use different digital bands to broadcast DAB channels. If you know the band(s) required, then you can choose from the Band selection list. Select Change to display a list of formats. The available bands are: L Band Band III L Band & Band III L Band Canada L Band Can & Band III 269