Manual Harman Kardon AVR 135 (page 25 of 48) (English)

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OPERATION

the digital source by pressing the Digital Select

Button

q# and then using the

⁄

Buttons

n on the remote or the

‹

›

Selector Buttons

) on the front panel to

choose any of the

OPTICAL or COAXIAL

inputs

, as they

appear in the

Upper Display Line ˜ or on-screen

display. When the digital source is playing, the

AVR 135 will automatically detect which type of digital

data stream is being decoded and display that infor

mation in the

Upper Display Line ˜.

Digital Bitstream Indications

When a digital source is playing

, the AVR 135 senses

the type of bitstream data that is present.

Using this

information, the correct surround mode will automati-

cally be selected. For example, DTS bitstreams will

cause the unit to switch to DTS decoding

, and Dolby

Digital bitstreams will enable Dolby Digital decoding.

When the unit senses PCM data from CDs or LDs, you

may select any of the standard surround modes, such

as Dolby Pro Logic II or Logic 7. Since the range of

available surround modes is dependent on the type of

digital data that is present, the AVR 135 uses a variety

of indicators and messages to let you know what type

of signal is present. These messages will appear shortly

after an input or surround mode is changed, and they

will remain in the

Lower Display Line ¯ for about

five seconds before that portion of the display returns

to the normal surround mode indication.

Surround Mode Types

For Dolby Digital and DTS sources, a three digit indi-

cation will appear, showing the number of channels

present in the data. An example of this type of display

is 3/2/.1.

The first number indicates how many discrete front

channel signals are present.

• A “3” tells you that separate front left, center and

front right signals are available

This will be displayed

for Dolby Digital 5.1 and DTS 5.1 programs.

•

A “2” tells you that separate front left and right

signals are available, but there is no discrete center

channel signal. This will be displayed for Dolby

Digital bitstreams that have stereo program

material.

• A “1” tells you that there is only a mono channel

available in the Dolby Digital bitstream.

The middle number indicates how many discrete sur-

round channel signals are present.

• A “2” tells you that separate surround left and right

signals are available. This will be displayed for Dolby

Digital 5.1 and DTS 5.1 programs.

• A “1” tells you that there is only a single, surround-

encoded surround channel.

This will appear for

Dolby Digital bitstreams that have matrix encoding.

• A “0” indicates that there is no surround channel

information. This will be displayed for two-channel

stereo programs.

The last number indicates whether there is a discrete

low-frequency effects (LFE) channel. This is the “.1”

in the common abbreviation of

“5.1” sound and is a

special channel that contains only bass frequencies.

•

A “1” tells you that an LFE channel is present.

This will be displayed for Dolby Digital 5.1 and

DTS 5.1 programs, as available.

• A “0” indicates that there is no LFE channel infor-

mation available. However, even when there is no

dedicated LFE channel,

low-frequency sound will

be present at the subwoofer output when the

speaker configuration is set to show the presence

of subwoofer.

• The information in the right side of the display will

tell you if the digital audio data contains a special

flag signal that will automatically activate the appro-

priate 6.1 or 7.1 mode. This will be shown as

EX-ON or EX-OFF for Dolby Digital bit-

streams and

ES-ON or ES-OFF for DTS

bitstreams.

When Dolby Digital 3/2/.1 or DTS 3/2/.1 signals are

being played, the AVR will automatically switch the

proper surround mode, and no other processing may

be selected. When a Dolby Digital signal with a 3/1/0

or 2/0/0 signal is detected you may select any of the

Dolby surround modes.

It is always a good idea to check the readout for the

channel data to make certain that it matches the audio

logo information shown on the back of a DVD pack-

age. In some cases you will see indication for “2/0/0”

even when the disc contains a full 5.1,

or 3/2/.1 sig

nal.

When this happens, check the audio output set-

tings for your DVD player or the audio menu selections

for the specific disc being played to make certain that

the player is sending the correct signal to the AVR.

UNLOCK message may appear in the Lo

wer

Display Line

¯. This is your indication that the digital

audio data stream has been interrupted or is no longer

present. When that occurs, the unit’s digital signal

processor has no signal to lock onto

and is thus

“unlocked.” You may see this message when a DVD is

first started until the stream is playing and the proces-

sor deter

mines which mode to apply; or any time the

data stream is stopped or paused, such as when the

menus of some discs are displayed or when the player

is switching between the different sections of a disc

You may also see the message when a satellite

receiver, cable set-top or HDTV tuner is in use if the

digital audio is temporarily interrupted when channels

are changed or when a cable box switches from a

channel with a digital data stream to a channel with

analog audio only. The

UNLOCK message is nor-

mal,

and does not indicate any problem with your

receiver

. Rather, it tells you that the incoming data has

simply been paused or is not present for a variety of

possible reasons.

PCM Playback Indications

PCM is the abbreviation for Pulse Code Modulation,

which is the type of digital signal used for standard CD

playback and other non-Dolby Digital and non-DTS

digital sources such as Mini-Disc. When a PCM signal

is detected, the Lower Display Line ¯ will briefly

show a message with the letters PCM, in addition to a

readout of the sampling frequency of the digital signal.

In most cases this will be

48kHz, though in the

case of specially mastered, high-resolution audio discs

you will see a

96kHz indication.

Some DVD discs are recorded with both “5.1” and

“2.0” versions of the same sound-track. When playing

a DVD, always be certain to check the type of material

on the disc. Most discs show this information in the

form of a listing or icon on the back of the disc jacket.

When a disc does offer multiple soundtrack choices

you may have to make some adjustments to your

DVD player (usually with the “Audio Select” button or in

a menu screen on the disc) to send a full 5.1 feed to

the AVR 135. It is also possible for the type of signal

feed to change during the course of a DVD playback.

In some cases the previews of special material will

only be recorded in 2.0 audio, while the main feature

is available in 5.1 audio. As long as your DVD player is

set for 6-channel output,

the AVR 135 will automati-

cally sense changes to the bitstream and channel

count and reflect them in these indicators.

Speaker/Channel Indicators

In addition to the bitstream indicators, the AVR 135

features a set of unique channel-input indicators that

tell you how many channels of digital information are

being received and/or whether the digital signal is

interrupted. (See Figure 9.)

Figure 9

These indicators are the L/C/R/LFE/SL/SR/SBL/SBR

letters that are inside the center boxes of the

Speaker/

Channel Input Indicators

ˆ on the front panel.

Remember that the AVR 135 is capable of processing

a 7.1-channel signal, although you may only connect

AVR 135 OM 12/3/04 12:11 PM Page 25

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