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On Screen Display

23

The following functions may be adjusted
through the Menu Control System:

INPUT SELECTION

: After reaching

the 

INPUT SELECTOR

menu

(Figure #13), use the arrow keys on the
remote 

q

to select the desired input.

Remember that when a split listening
session is desired, select the 

VIDEO

source first, followed by the 

AUDIO

source. To use the Tape Monitor, press
the down arrow button 

¤

q

to move

the on-screen cursor. Use the  

‹

and 

›

arrow buttons to turn the Tape Monitor
On or Off.

RECORD OUT SELECTION

: After

reaching the 

REC OUT SELECTOR

menu (Figure #14) use the navigational
arrow keys to select the input to either

TAPE 1

or 

VCR 1

. Note that if the

current main input 

SOURCE

is chosen,

two more lines will appear on the screen
to remind you which audio and video
sources are selected. (Figure #15).

SURROUND MODE

: After reaching 

the 

SURROUND MODE

menu (Figure

#16), use the navigational arrows 

q

to

select the desired mode. When a mode is
selected that uses the surround channels,
you may change the rear channel

DELAY TIME

at this menu. 

TEST TONE

: At this menu you may

adjust the speaker output levels. For
information on this procedure, refer to
the System Configuration section of this
Manual.

MULTI-ROOM SEL

: For information

on configuring and using the multiroom
audio functions of the AVI250, consult
the appropriate section of this Manual.

SET UP MENU

: For information on

using the Set Up menus, refer to the
System Configuration section of this
Manual.

    > T A P E   * S O U R C E *

      V C R 1   * S O U R C E *

      A U D I O   * T U N E R *

     

      V I D E O   * L D *

R E T U R N   T O   M A I N   M E N U

R E C   O U T   S E L E C T O R

  > M O D E   : T H X   C I N E M A

    D E L A Y   T I M E   : 2 0 m s

R E T U R N   T O   M A I N   M E N U

S U R R O U N D   M O D E

Engelsk manual AVI250  11/01/98 8:53  Side 23

Advanced Features

24

In addition to basic audio functions, this
unit is capable of both sophisticated
audio/video dubbing and a wide range of
surround modes. Advanced digital signal
processing provides specialized surround
modes that are compatible with virtually
all types of music software and movie
soundtracks. 

For the ultimate in sound reproduction,
the AVI250 is equipped for digital input
from laser disc or CD players with a
coaxial digital output, so that the sound
reaching the surround processor comes
directly from the disc. 

Finally, the AVI250 is prepared for the
future with provisions for connection to
outboard 5.1 multi channel (i.e., AC-3 or
DTS) digital audio decoders. 

Audio Tape Dubbing
This unit is equipped for connection 
to two audio recorders (

and

) and two video recorders

(

and 

). 

For recordings to the audio tape decks or
other devices connected to 

and

, input source selection is

performed by pressing the 

button 

(

on the front panel. 

At the first press of the button, a status
display will appear on both the front
panel display and the on screen video
menus (Figure #8) to remind you that
the input currently in use is also being
routed to both 

outputs. If this is

acceptable, no further action is required.

To record a source other than the current
output, press the 

button

to change the 

input in the

following order:

SOURCE ‡ TUNER ‡ CD ‡

TAPE 2 ‡ SOURCE

NOTE: Since the source selected by the

function is the same at

both 

and 

, the control

system is programmed to prevent
recording from a machine onto itself.
When either 

input is selected as

the main 

it will not appear in

the 

selection list.

Press the button until the input you wish
to record appears. You may now change
the main listening input without fear of
disturbing the recording as long as the
unit’s power remains on.

NOTE: It is not possible to select one of
the video inputs (

, 

, 

,

) as a direct recording source. To

make an audio recording of these sources
select one as the main input source, and
then use the 

button 

(

to select 

SOURCE

. 

Input sources for 

dubbing

may also be selected using the on screen
video menu system. Follow the
instructions elsewhere in this Manual.

Video Dubbing
Video dubbing is similar to that for audio
recording, with changes to accommodate
the requirements of recording both an
audio and video source. For video
recording it is important to note that the
output to 

only is selected with the

front panel switch. The output to 

is always set to the current input source.
(Unless that Source is 

, in which

case the 

record output is blank.)

To select inputs for VCR dubbing use the

button 

Ó

on the front

panel.

At the first press of the button, a status
display will appear on both the front
panel display and the on screen video
menus (Figure #8) to remind you that
the input source currently in use is also
being routed to the 

output. If this

is acceptable, no further action is
required. 

To record a source other than the input,
press the 

button again,

and note that the display will change in
the following order:

SOURCE ‡ TV ‡ LD ‡

VCR 2 ‡ AUX ‡ SOURCE

Press the button until the input you wish
to record appears. You may now change
the main listening input without fear of
disturbing the recording as long as the
unit’s power remains on.

Engelsk manual AVI250  11/01/98 8:53  Side 24

Advanced Features

25

Audio/Video Simulcast Recording
It is possible to record the video from one
source along with the audio from a
different input. This is useful in the case
of musical programs where the sound is
being broadcast via FM, or for sports
events where you wish to have the picture
from a TV station, but the play-by-play
from a radio station.

To create a simulcast recording first select
the video source input (

, 

, 

,

) using the input selection buttons

on the remote control or front panel.

78c

Next, select the audio source

(

, 

or 

) 

3456

.

Note that the on screen menu display will
show the split sources (Figure # 7). The
front panel display will show the audio
source in large letters in the main portion
of the Information Display, while the
video source will appear in smaller letters
next to the 

VISUAL

¡

indicator. Once

the split source is configured, select

as the input for VCR1 by

pressing the 

button.

Input sources for 

dubbing

may also be made using the on screen
video menu system.

Delay Time Adjust
One aspect of the surround modes is the
delay of audio signals between the front
speakers and the rear speakers. Each
surround mode is factory preset with a
specific delay time, but it is possible to
individually adjust the delay timing to
custom tailor the sound to your
individual taste and the acoustic
conditions in your listening room or
home theater.

The factory setting is appropriate for most
rooms, but some installations create an
uncommon distance between the front
and surround speakers that may cause
the arrival of front channel sounds to
become disconnected from surround
channel sounds.

To re-synchronize the front and surround
channels, follow these steps:

1. Measure the distance from the
listening/viewing position to the front
speakers. 

2. Measure the distance from the
listening/viewing position to the
surround speakers. 

3. Subtract the distance to the
surround speakers from the distance
to the front speakers and multiply the
figure by three (3). Add fifteen (15) to
the result and round to the nearest
appropriate figure to obtain the delay
time . For example, if the front
speakers are 4 meters from the
listening position and the surround
speakers are 1 meter behind the
listening position, difference between
the fronts and rears is 3. Multiply that
by 3 (which equals 9) and add 15 to
yield a result of 24. Set the delay to
25ms.

NOTE: The delay time may only be
adjusted in certain modes.

If the delay time needs to be changed, 
it may be increased by pressing the

button 

@ p

on the front

panel. The delay time will be briefly 
displayed on the video menus as well as
the front panel.

In addition to the use of the delay time
formula, it is a good idea to understand
the features of each of the AVI250’s
surround modes when entering delay
time. The chart on page 27 provides an
explanation of the suggested for each
mode. The chart also contains the delay
time limits for each of the modes.

Direct Digital Decoding
The AVI250’s digital signal processing
uses sophisticated microprocessors and
advanced digital audio engines that
manipulate sound in the digital domain.
In order to work with sound, these
circuits must first convert the incoming
analog audio input to a digital signal.
After processing, the digital audio signal
must be converted back to analog for
volume control and amplification.

While the digital to analog (D/A) and
analog to digital (A/D) circuits in the AVI
250 are high quality, any time an audio
signal is digitized or reconstructed to
analog there is the possibility of quality
loss. This helps you to avoid un-needed
A/D and D/A conversion from any laser
disc player equipped with a coaxial PCM
digital output.

Engelsk manual AVI250  11/01/98 8:53  Side 25

Advanced Features

26

If your player has this type of output,
connect the LD player to the AVI250 with
a high quality digital interconnect (110
ohm cable with RCA plugs). The
connection should be made to the 

jack 

S

on the rear panel.

Once this connection is made, the AVI250
will accept a PCM digital audio output
directly from your LD player. This means
that audio signals will remain in their
pure digital state until after all surround
processing has taken place. To select the
direct digital input, press the LD button

7c

and hold it for three seconds.

NOTE: This connection is for standard
two channel 44.1 kHz PCM digital audio,
as provided by LD or CD machines. It is
NOT an input for multichannel digital
audio signals such AC-3 or DTS. Improper
connection to the wrong type of digital
output may cause damage to the AVI250
or other components in your audio system
and are not covered by the product
warranty. Consult your dealer or installer
if you have any questions about this input.

6 Channel Direct Operation
Since 1993, an increasing number of
theatrical motion pictures have been
recorded with digital sound tracks. 
With these new processes such as Dolby
Surround Digital

™

, DTS

®

and Sony’s

SDDS

®

, five or more discrete sound 

channels are available along with a
dedicated subwoofer channel for low
frequency sounds. The replacement of
analog matrix theatrical audio, such as
Dolby Stereo, with these new systems has
greatly increased the enjoyment of movie
sound.

Advances in electronics technology now
make it possible to bring these discrete
digital audio soundtracks into your
home. Many of today’s new LD players
and an increasing number of LD movie
releases provide for Dolby AC-3 Digital
soundtracks. In the future, high
definition television (HDTV) broadcasts
will also carry multichannel digital audio
information.

To prevent your AVI250 from
obsolescence, special jacks are provided
for use with external multichannel audio
adapters.

If an adapter is installed in your system,
connect its six analog audio outputs to
the 

jacks 

∆

on

the AVI250’s rear panel.

When listening to programs using an
external adapter, press the 

button 

*

on the front panel.

All surround processing will be disabled
when 6 Channel Direct is in use, as none
is required with discrete audio signals.
Volume is controlled in the normal
fashion.

NOTE: Audio reproduced from 6 Channel
Direct inputs may not be recorded.

Engelsk manual AVI250  11/01/98 8:53  Side 26