Audioaccess AVR21EN, Руководство по установке

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Speaker/Channel Indicators
In addition to the bitstream indicators, the AVR21EN features channel-input indicators that show
how many channels of digital information are being received and/or whether the digital signal is
interrupted.
Figure 73 Speaker/Channel Input Indicators
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 [square 35] on the front panel. When a standard analog
signal is in use, only the “L” and “R” indicators will light, as analog signals have only left and right
channels.
Digital signals may have two, five, six or seven channels; depending on the program material, its
method of transmission and the way in which it was encoded. When a digital signal is playing, the
letters in these indicators will light in response to the signal being received. It is important to note
that although Dolby Digital, for example, is referred to as a “5.1” system, not all Dolby Digital
DVDs or programs are encoded for 5.1. Thus, it is sometimes normal for a DVD with a Dolby
Digital soundtrack to trigger only the “L” and “R” indicators.
NOTE: Many DVD discs are recorded with both “5.1” and “2.0,” and Dolby Digital and DTS
versions of the same soundtrack. When playing a DVD, always be certain to check the type of
material on the disc. Most discs show this information using icons on the back of the disc jacket.
When a disc offers 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 AVR21EN or to select between Dolby Digital or DTS. It is also possible for the
type of signal feed to change during the course of a DVD’s playback. In some cases, the
previews or special material will be recorded in 2.0 audio, while the main feature is available in
5.1 audio. The AVR21EN will automatically sense changes to the bitstream and channel count
and reflect them in these indicators.
The letters used by the
Speaker/Channel Input Indicators [square 35] also flash to indicate
when a bitstream has been interrupted. This will happen when a digital input source is selected
before the playback starts, or when a digital source such as a DVD is paused. The flashing
indicators, along with the
UNLOCK message in the AVR Lower Display Line [square 34], remind
you that the playback has stopped due to the absence of a digital signal and not through any fault
of the AVR21EN. This is normal, and the digital playback will resume once the playback is started
again.
Night Mode
A special feature of Dolby Digital is the Night Mode, which enables specially encoded Dolby
Digital input sources to be played back with full digital intelligibility while reducing the minimum
peak level by 1/4 to 1/3. This prevents abruptly loud transitions from disturbing others, without
reducing the impact of the digital source. The Night Mode is available only when Dolby Digital
signals with special data are being played.