JVC KD-G721: More about this unit

When shipped from the factory, Alternative

2 Select the preset number (1 – 6) you

Frequency Reception is activated.

want to store into.

To deactivate the Alternative Frequency

Reception, see page 17.

To change the display information while

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tuning to an ensemble

Preset number flashes for a while.

Service name = Ensemble name = Channel

number = Frequency = Clock = (back to the

beginning)

Tuning in to a preset DAB service

1

More about this unit

Basic operations

2 Select the preset DAB service

Turning on the power

(primary) number (1 – 6) you want.

• By pressing SRC on the unit, you can also

turn on the power. If the source is ready,

playback also starts.

Turning off the power

If the selected primary service has some

• If you turn off the power while listening to a

secondary services, pressing the same

disc, disc play will start from where playback

button again will tune in to the secondary

has been stopped previously, next time you

services.

turn on the power.

Tuner operations

Tracing the same programme—

Storing stations in memory

Alternative Frequency Reception

• During SSM search...

You can keep listening to the same programme

– All previously stored stations are erased and

by activating the Alternative Frequency

stations are stored newly.

Reception.

– Received stations are preset in No. 1 (lowest

• While receiving a DAB service:

frequency) to No. 6 (highest frequency).

When driving in an area where a service

– When SSM is over, the station stored in

cannot be received, this unit automatically

No. 1 will be automatically tuned in.

tunes in to another ensemble or FM RDS

• When storing a station manually, the

station, broadcasting the same programme.

previously preset station is erased when a new

• While receiving an FM RDS station:

station is stored in the same preset number.

When driving in an area where a DAB service

is broadcasting the same programme as the

FM RDS station is broadcasting, this unit

automatically tunes in to the DAB service.

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FM RDS operations

Playing a CD-R or CD-RW

• Network-Tracking Reception requires

• Use only “finalized” CD-Rs or CD-RWs.

two types of RDS signals—PI (Programme

• This unit can play back only files of the same

Identification) and AF (Alternative

type which are first detected if a disc includes

Frequency) to work correctly. Without

both audio CD (CD-DA) files and MP3/

receiving these data correctly, Network-

WMA files.

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Tracking Reception will not operate correctly.

• This unit can play back multi-session discs;

• If a Traffic Announcement is received by

however, unclosed sessions will be skipped

TA Standby Reception, the volume level

while playing.

automatically changes to the preset level (TA

• Some CD-Rs or CD-RWs may not play

VOL) if the current level is lower than the

back on this unit because of their disc

preset level.

characteristics, or for the following reasons:

• When Alternative Frequency Reception

– Discs are dirty or scratched.

is activated (with AF selected), Network-

– Moisture condensation occurs on the lens

Tracking Reception is also activated

inside the unit.

automatically. On the other hand, Network-

– The pickup lens inside the unit is dirty.

Tracking Reception cannot be deactivated

– CD-R/CD-RW on which the files are

without deactivating Alternative Frequency

written with “Packet Write” method.

Reception. (See page 16.)

– There are improper recording conditions

• If you want to know more about RDS, visit

(missing data, etc.) or media conditions

«http://www.rds.org.uk».

(stained, scratched, warped, etc.).

• CD-RWs may require a longer readout time

since the reflectance of CD-RWs is lower than

Disc operations

that of regular CDs.

Caution for DualDisc playback

• Do not use the following CD-Rs or CD-RWs:

• The Non-DVD side of a “DualDisc” does

– Discs with stickers, labels, or a protective

not comply with the “Compact Disc Digital

seal stuck to the surface.

Audio” standard. Therefore, the use of Non-

– Discs on which labels can be directly

DVD side of a DualDisc on this product may

printed by an ink jet printer.

not be recommended.

Using these discs under high temperatures or

high humidities may cause malfunctions or

General

damage to the unit.

• This unit has been designed to reproduce

Playing an MP3/WMA disc

CDs/CD Texts, and CD-Rs (Recordable)/

CD-RWs (Rewritable) in audio CD (CD-DA),

• This unit can play back MP3/WMA files

MP3, and WMA formats.

with the extension code <.mp3> or <.wma>

(regardless of the letter case—upper/lower).

Inserting a disc

• This unit can show the names of albums,

• When a disc is inserted upside down,

artists (performer), and Tag (Version 1.0, 1.1,

“PLEASE” and “EJECT” appear alternately on

2.2, 2.3, or 2.4) for MP3 files and for WMA

the display. Press 0 to eject the disc.

files.

• Do not insert 8 cm discs (single CD) and

• This unit can display only one-byte

unusual shape discs (heart, flower, etc.) into

characters. No other characters can be

the loading slot.

correctly displayed.

Playing a disc

• While fast-forwarding or reversing on an MP3

or WMA disc, you can only hear intermittent

sounds.

Continued on the next page

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• This unit can play back MP3/WMA files

Playing MP3/WMA tracks from a USB memory

meeting the conditions below:

• While playing from a USB memory, the

– Bit rate: 8 kbps — 320 kbps

playback order may differ from other players.

– Sampling frequency:

• This unit may be unable to play back some

48 kHz, 44.1 kHz, 32 kHz (for MPEG-1)

USB memories due to their characteristics or

24 kHz, 22.05 kHz, 16 kHz (for MPEG-2)

recording conditions.

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– Disc format: ISO 9660 Level 1/Level 2,

• Depending on the shape of the USB memories

Romeo, Joliet, Windows long file name

and connection ports, some USB memories

may not be attached properly or the

• The maximum number of characters for file/

connection might be loose.

folder names vary among the disc format used

• It is not recommended to use a USB memory

(includes 4 extension characters—<.mp3> or

wider than 20 mm as it will block you from

<.wma>).

pressing the 0 button.

– ISO 9660 Level 1: up to 12 characters

• If the connected USB memory does not have

– ISO 9660 Level 2: up to 31 characters

the correct files, “NO FILES” appears and the

– Romeo*: up to 128 (72) characters

unit returns to the previous source.

– Joliet*: up to 64 (36) characters

• This unit can show Tag (Version 1.0, 1.1, 2.2,

– Windows long file name*: up to 128 (72)

2.3, or 2.4) for MP3 files and for WMA files.

characters

• This unit can play back MP3/WMA files

* The parenthetic figure is the maximum

meeting the conditions below:

– Bit rate:

number of characters for file/folder names in

MP3: 32 kbps — 320 kbps (MPEG-1)

case the total number of files and folders is

8 kbps — 160 kbps (MPEG-2/2.5)

313 or more.

WMA: 5 kbps — 320 kbps

• This unit can play back files recorded in VBR

– Sampling frequency:

(variable bit rate).

MP3: 48 kHz, 44.1 kHz, 32 kHz (MPEG-1)

Files recorded in VBR have a discrepancy

24 kHz, 22.05 kHz, 16 kHz (MPEG-2)

in elapsed time display, and do not show

12 kHz, 11.025 kHz, 8 kHz (MPEG-2.5)

the actual elapsed time. Especially, after

WMA: 8 kHz — 48 kHz

performing the search function, this

• This unit can play back MP3 files recorded in

difference becomes noticeable.

VBR (variable bit rate).

• This unit can recognize a total of 512 files, of

• The maximum number of characters for

folder and file names is 25 characters; 128

200 folders, and of 8 hierarchies.

characters for MP3/WMA tag information.

• This unit cannot play back the following files:

• This unit can recognize a total of 2 500 files

– MP3 files encoded with MP3i and

and 250 folders (999 files per folder).

MP3 PRO format.

• This unit cannot play back the following files:

– MP3 files encoded in an inappropriate

– MP3 files encoded with MP3i and

format.

MP3 PRO format.

– MP3 files encoded with Layer 1/2.

– MP3 files encoded in an inappropriate

– WMA files encoded with lossless,

format.

professional, and voice format.

– MP3 files encoded with Layer 1/2.

– WMA files which are not based upon

Changing the source

Windows Media

Audio.

®

• If you change the source, playback also stops.

– WMA files copy-protected with DRM.

Next time you select the same source again,

– Files which have the data such as WAVE,

playback starts from where it has been

ATRAC3, etc.

stopped previously.

• The search function works but search speed is

not constant.

Ejecting a disc

• If the ejected disc is not removed within

15 seconds, the disc is automatically inserted

again into the loading slot to protect it from

dust. (Disc will not play this time.)

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