Harman Kardon AVR 240, Руководство по обслуживанию

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32 OPERATION
OPERATION
appears in the Lower Display Line
5
, and then
use the
‹
/
›
Buttons
)
to boost or cut the low
or high frequencies by up to ±10dB, in 2dB steps,
until the desired setting is achieved. You may also
totally remove the tone controls from the circuit so
that the output is “flat” at any time by pressing the
Tone Mode Button
5
and then pressing the
‹
/
›
Buttons
)
so that
TONE OUT
appears
in the on-screen display and the Lower Display
Line
ı
. The tone controls may also be adjusted
using the
AUDIO SETUP
submenu as
described on page 21.
• For private listening, plug the 1/4" stereo phone
plug from a pair of stereo headphones into the
front-panel
Headphone Jack
4
. When the
headphone plug is connected, all speakers will be
silenced and
DOLBY H:BP will scroll once
across the Lower Display Line
ı
, indicating that
the headphone output is in the Bypass mode, and
to confirm that no processing is being used. When
the headphone plug is removed, the audio feed to
the speakers will be restored.
• When the headphones are in use, you may take
advantage of the Dolby Headphone modes to bring
added spaciousness to headphone listening. Press
the
Dolby Mode Select Button
w
or the
Surround Mode Group Selector
7
to cycle
through the three Dolby Headphone modes and
select the one that you prefer.
Surround Mode Selection
One of the important features of the AVR 240 is its
ability to reproduce a full multichannel surround sound
field from digital sources, analog matrix surround-
encoded programs and standard stereo programs.
Selection of a surround mode is based on personal
taste, as well as the type of program source material
being used. For example, motion pictures or TV pro-
grams bearing the logo of one of the major surround-
encoding processes, such as Dolby Surround or DTS
Stereo, may be played in either the Dolby Digital, Dolby
Pro Logic II or IIx Movie, DTS Neo:6 Cinema, or
Logic 7 5.1 or 7.1 Cinema surround modes.
NOTE: Once a program has been encoded with matrix
surround information, it retains the surround information
as long as the program is broadcast in stereo. Thus,
movies with surround sound may be decoded via any of
the analog surround modes such as Dolby Pro Logic IIx
Cinema, Logic 7 Cinema or DTS Neo:6 Cinema, when
they are broadcast via conventional TV stations, cable,
pay-TV and satellite transmission. In addition, a growing
number of made-for-television programs, sports broad-
casts, radio dramas and music CDs are also recorded
in surround sound.
Even when a program is not listed as carrying inten-
tional surround information, you may find that the Dolby
Pro Logic IIx, Logic 7 Enhanced or DTS Neo:6, VMAx
and the Hall or Theater modes often deliver enveloping
surround presentations through the use of the natural
information present in all stereo recordings.
Surround modes may be changed at any time by
using either the front panel or remote control. Any
changes made to the surround mode for that source
will be retained in the AVR’s menu, even after another
source is selected, or if the AVR is placed in Standby
mode. To select a new surround mode from the
front panel, first press the
Surround Mode Group
Selector Button
7
until the desired major surround
mode group, such as Dolby, DTS or Logic 7, is select-
ed. Next, press the
Surround Mode Selector Button
8
to choose the specific individual surround mode.
To select a surround mode using the remote, press
the button for the major surround mode group that
includes the mode you wish to choose from:
Dolby
w
, DTS Surround
x
, DTS Neo:6
S
,
Logic 7
y
, Stereo
R
or DSP Surround
k
.
The first press of the button will show the current
mode from that group. To cycle through the available
modes in that group, press the button again until the
desired mode appears in the
Lower Display Line
ı
, the on-screen display and in the Surround
Mode Indicators
ˆ
. As the surround mode
changes, the appropriate Surround Mode Indicator
ˆ
will light to indicate the current mode. At times, it
is possible that more than one indicator will light. This
can occur when the DSP Surround Off mode has
been selected, or when post-processing is being used
with an input signal, such as when the Dolby Digital
2.0 plus Dolby Pro Logic IIx mode is used to create
a 7-channel presentation of a two-channel signal.
The Dolby Digital, Dolby Digital EX and DTS 5.1,
DTS-ES Matrix and DTS-ES Discrete modes may only
be selected when a digital input is in use and a digital
signal in that format is present. In addition, when a
digital source is present, the AVR 240 will automatically
select and switch to the correct mode, regardless of
the mode that has been previously selected. For more
information on selecting digital sources, see the Digital
Audio Playback section.
The Dolby Pro Logic IIx modes are available only
when the AVR 240 has been configured for 6.1/7.1
operation by setting the Surround Back speakers as
either
LARGE
or
SMALL
as described on page
26. These modes provide a matrixed 6.1-channel
presentation of analog sources. See page 26 for
more information.
When the 6-channel/8-channel direct inputs are in
use there is no surround processing, as these inputs
take the analog output signals from an optional, exter-
nal DVD-Audio or SACD player, or another source
device and carry them straight through to the volume
control without any further digital processing.
To listen to a program in traditional two-channel stereo,
using the front left and front right speakers only (plus
the subwoofer, if installed and configured), press the
Stereo Button
R
until
SURROUND OFF
appears in the Lower Display Line
ı
, or press the
Surround Mode Group Selector
7
until the Stereo
modes appear in the on-screen display and Lower
Display Line
ı
and then press the Surround Mode
Select Button
8
until
SURROUND OFF
appears in the on-screen display and Lower Display
Line
ı
.
When an analog audio source is in use, you may
activate an analog bypass Surround Off mode, if you
have removed the tone controls from the processing
circuitry by pressing the
Tone Mode Button
5
and using the
‹
/
›
Buttons
)o
until the
TONE OUT
message appears in the Lower
Display Line
ı
.
Normally, the DSP icon will appear in the
Surround Mode Indicators
ˆ
, and the message
SURROUND OFF
will appear in the lower line
of the semi-OSD display. When the DSP icon appears,
the incoming signal is digitized and any bass manage-
ment settings are applied. This mode is recommended
when your front speakers are not capable of repro-
ducing the lower frequencies and are thus used with
a subwoofer.
When the DSP icon is not lit in Surround Off mode
with an analog audio input in use, the AVR is in analog
bypass mode. The signal is being routed directly to the
volume control, without entering the digital domain and
without any bass management settings being applied.
This mode is desirable when your left and right speak-
ers are capable of reproducing low frequencies, and
when you wish to hear the analog source material in
its pure form.
Digital Audio Playback
Digital audio is a major advancement over older analog
surround processing systems such as Dolby Pro Logic.
It delivers five, six or seven discrete channels: left front,
center, right front, left surround, right surround and
optionally one or two surround back channels. Each
channel reproduces full frequency range (20Hz to
20kHz) and offers dramatically improved dynamic range
and significant improvements to signal-to-noise ratios. In
addition, digital systems have the capability to deliver an
additional channel that is specifically devoted to low-fre-
quency information. This is the “.1” channel referred to
when you see these systems described as “5.1,” “6.1”
or “7.1”. The bass channel is separate from the other
channels, but since it is intentionally bandwidth-limited,
sound designers have given it that unique designation.
OPERATION
AVR240 harman/kardon
19