JBL Synthesis Sdp3 Manual

							JBL Synthesis
System
Configuration
22
LED and redirects the current main zone input to the Record/Zone 2
outputs.
OFF
Turns off the Zone 2 outputs, and the associated front panel LEDs.
OSD (ON)
Displays a STATUS menu for the current input. Press Done to exit.
VOL ▲ and ▼
Displays, then adjusts the current Zone 2 volume level. Activated
displays (FP or OSD) will show level and a bar gauge. When Zone 2
mute is engaged, these controls adjust volume without disengaging
Zone 2 mute.
Mute
Engages Zone 2 mute and reduces the Zone 2 volume level to -80dB.
Pressing again restores Zone 2 volume to its previous level.
SELECT and DONE (remote control only)
Displays, then adjusts Zone 2 left/right balance. Activated displays (FP
or OSD) will show bar gauge and level in dB.
VCR, DVD, V Disc, TV, AUX, CD, Tuner, and Tape
Selects the Record/Zone 2 input and lights the corresponding front
panel input LED (unless the input is blocked).
Dolby, THX, Logic 7, and DTS (remote control only)
These controls set the Zone 2 volume level to the following levels.
Dolby -30dB
THX -20dB
Logic 7 -10dB
DTS +00dB
2 CH, Party, TV M, and Music (remote control only)
These controls set the master volume level to  the following levels. When
Zone 2 mute is engaged, these controls set the Zone 2 volume level
without disengaging mute.
2CH -30dB
Party -20dB
TV M -10dB
Music +00dB 
						

							SDP-3 Digital Surround Processor/Controller
System
Configuration
23
Front L/R
Select LARGE for full-range front speakers to deliver full frequency
response to the front left and right outputs. Selecting SMALL activates
a 12dB per octave highpass filter and automatically routes low fre-
quency information to the subwoofer output. Choices of 40, 80 and
120 Hz are available for the -3dB point. The SMALL setting is recom-
mended unless your speakers are capable of handling full audio
signals, or are equipped with their own crossovers. This setting should
be on SMALL at 80Hz for ALL JBL Synthesis systems.
Speaker Configuration
The Speaker Configuration menu allows a wide range of choices in
speaker type and room setups to provide optimal performance in
almost any room.  An adjustable lowpass filter is available for the
subwoofer, as well as a highpass filter for all other speakers. The two
selections are for CUSTOM or THX configuration.
Custom Configuration
Press SELECT to open the CUSTOM CONFIG menu. Press SELECT
to access the selections for any highlighted menu item.
SETUP MENU
INPUT CONFIG
SPEAKER CONFIG
OUTPUT LEVELS
LISTENER POSITION
LOCK SETTINGS
SPEAKER SETUP MENU
CUSTOM CONFIG
THX SPEAKER CONFIG
CUSTOM CONFIG MENU
FRONT L/R
CENTER
SIDES
REARS
SUBWFR
▲▼Adjust with        or
SMALL
SMALL
   DIPOLE  SMALL
SMALL
YESLARGE, SMALL
LARGE, SMALL, NONE
LG or SM STD, LG or SM DIPOLE, NONE
LARGE, SMALL, NONE
YES, NO
The high pass filter attenuates low frequencies
at 12dB per octave. The values given are for the
-3dB point.
10 10050 20 2k1k 500 200 5k 10k
dBr
Hz0.0
-1.000
-2.000
-3.000
-4.000
-5.000
-6.000
-7.000
-8.000
-9.000
-10.00
-11.00
-12.00
-13.00
-14.00
-15.00
-16.00
-17.00
-18.00 
						

							JBL Synthesis
System
Configuration
24
Center
Systems that utilize a full-range center speaker should select LARGE to
direct center information to the center output with a full frequency
response. Select SMALL for installations where the center speaker is
smaller than the left and right front speakers. This will automatically
engage the Bass Split feature, which takes the low frequency content
from the center and distributes it to the left and right front speakers,
reducing the risk of damage to a small center speaker without loss of
bass information. When SMALL is highlighted, press SELECT to display
and adjust the crossover point for the low frequency redistribution.
Available crossover points are: 40, 80 and 120Hz. Press DONE to return
to the Speaker Configuration menu. This setting should be on SMALL
at 80Hz for ALL JBL Synthesis systems.
Sides
This menu sets the system for your particular side speaker configura-
tion. Systems with side speakers should be designated as STANDARD
(LARGE or SMALL) or DIPOLE (LARGE or SMALL). DIPOLE indicates
a THX speaker configuration, and will work best for dipoles, whether or
not speakers are used. When STANDARD SMALL or DIPOLE SMALL
is highlighted, press SELECT to display and adjust the highpass filter for
the side outputs. Choices are 40, 80 or 120Hz. For any 5.1 channel
inputs, selecting SMALL routes the low frequency information to the
subwoofer output. Selecting NONE mutes the side outputs and directs
all surround information to the rear outputs. This setting should be on
DIPOLE  SMALL at 80Hz for ALL JBL Synthesis systems.
Rears
The active selections are LARGE and SMALL. Systems that utilize full-
range rear speakers should select LARGE to direct a full-range signal
to them. SMALL should be selected when filtering is desired. (40, 80 and
120Hz are available as settings for the -3dB point). For any 5.1 channel
inputs, selecting SMALL routes the low frequency information to the
subwoofer output. Selecting NONE mutes the rear outputs and directs
all surround information to the side outputs. When used with JBL
Synthesis systems using side and rear speakers, this setting should be
on SMALL at 80Hz. Otherwise, NONE should be selected.
10 10050 20 2k1k 500 200 5k 10k
dBr
Hz0.0
-1.000
-2.000
-3.000
-4.000
-5.000
-6.000
-7.000
-8.000
-9.000
-10.00
-11.00
-12.00
-13.00
-14.00
-15.00
-16.00
-17.00
-18.00
Bass Split rolls off frequencies at 12dB per
octave. The values given are at the -3dB point
of attenuation from the center speaker. 
						

							SDP-3 Digital Surround Processor/Controller
System
Configuration
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10 10050 201k 500 200
dBr
Hz+1.000
0.0
-1.000
-2.000
-3.000
-4.000
-5.000
-6.000
-7.000
-8.000
-9.000
-10.00
-11.00
-12.00
-13.00
-14.00
-15.00
-16.00
-17.00
-18.00
Subwoofer Frequency Response
The low pass filter attenuates high frequencies
at 24dB per octave. The values given are for the
6dB point.
Subwoofer Output
Use of the subwoofer output is specified here. Selecting YES, then
pressing SELECT allows you to display and adjust the crossover
frequency for the subwoofer output. All summing and filtering is per-
formed in the digital domain. You can select three different crossover
points (40, 80 or 120Hz) for the subwoofer. Although you can bypass the
crossover (OFF) and run a full range output if your subwoofer has an
internal crossover, it is generally best to use the crossover in the    SDP-
3. NO mutes the subwoofer output and disables the Subwoofer Level
parameter. For any 5.1 channel input, selecting NO routes the LFE
(.1 channel) to any front, side or rear speakers set to LARGE. When
used with ALL JBL Synthesis systems, this setting should be on yes.
THX Configuration
Selecting THX SPEAKER CONFIG from the SPEAKER SETUP menu
automatically sets the speaker selections to the appropriate configura-
tion for 5.1-channel THX listening. This setting is not recommended for
7.1-channel configuration. This configuration is not adjustable.
Setting Output Levels
When SDP-3 input and output levels are set properly, the entire system
will be calibrated to play films at the level intended by the director.
Setting the output levels is easy with a Sound Pressure Level (SPL)
meter. Using the SDP-3’s internally generated calibration signal, adjust
the level of each output to the same relative level (75dB "C" weighting).
INTERNAL NOISE TEST
EXTERNAL NOISE TEST
SUB PEAK LIMIT
MUTE LEVEL
PWR-ON VOL
Z-2 PWR-ONNoise signal sent sequentially to all speakers
Pro Logic effect w/current input as source
-5 to +35dB
-10dB, -20dB, -30dB, -40dB, FULL MUTE
LAST LVL, -80 to +6dB
LAST LVL, -80 to +12dB
▲▼Adjust with        or
+15dB
-30dB
-30dB
-30dB
OUTPUT LEVELS MENU
Select INTERNAL NOISE TEST or EXTERNAL NOISE TEST from the
Output Levels menu.
The INTERNAL NOISE TEST disables any EQ functions, centers the
Balance and Fader controls, and sets the system volume to +00dB. The
test signal circles the room according to the speaker configuration you
have defined in the Speaker Configuration menu. For a full complement
of speakers, the order is: Left Front, Center, Right Front, Right Side, Left
Side, Subwoofer, Right Rear, Left Rear.
SETUP MENU
INPUT CONFIG
SPEAKER CONFIG
OUTPUT LEVELS
LISTENER POSITION
LOCK SETTINGS
SPEAKER SETUP MENU
CUSTOM CONFIG
THX SPEAKER CONFIG 
						

							JBL Synthesis
System
Configuration
26
The  EXTERNAL NOISE TEST loads the Pro Logic, 5.1 Dolby or DTS
Music effect and uses the signal from the currently selected input for
calibration.
Once a test source is selected, a sub-menu showing each output level
is displayed. Use the ▲ and ▼ buttons to highlight an output for
adjustment.  Press SELECT to stop the cycling of the noise signal, then
use ▲ and ▼ to adjust the selected output level in precise 0.5dB
increments from -10dB to +10dB.
INTERNAL NOISE TEST
EXTERNAL NOISE TESTLEFT FRONT
CENTER*
RIGHT FRONT
RIGHT SIDE*
LEFT SIDE*
SUBWOOFER*
RIGHT REAR*
LEFT REAR*

▲▼Adjust with        orOUTPUT LEVELS MENU
-10dB to +10dB*These selections will not be active
if "NONE" is selected in the Speaker
Configuration menu.
Using a Sound Pressure Level Meter such as Radio Shack model
33-2050 or 33-2055, set the weighting to C  and the response to Slow.
Adjust the subwoofer output to 80dB. Adjust all other output levels to
achieve 75dB at the listening position.
In the absence of an SPL meter, it is possible to set the output level by
ear. Use the internal noise generator in the SDP-3 to adjust all volumes
to be the same as they cycle around the various speakers. Depending
on timbre variations between your speakers, this may be difficult to
judge — get as close as you can. The system should be reasonably well
balanced, although not actually calibrated for precise playback and
level matching. With the system volume at 0dB, the internal noise
source should be at the same level at which film dialog sounds
comfortable.
Note on External Noise Calibration
When using the external noise calibration, the SDP-3 will load the
factory default effect for the format of the incoming signal. In other
words, if a PCM signal is coming into the SDP-3 when external noise is
engaged, the SDP-3 will load the PRO LOGIC effect with the factory
preset settings. If a Dolby Digital AC-3 signal is coming in, the SDP-3 will
load the 5.1 DOLBY effect with the factory preset settings. If a DTS
signal is coming in, the SDP-3 will load the DTS MUSIC effect with the
factory preset settings.
NOTE: The Volume control is active when utilizing external noise
calibration. 
						

							SDP-3 Digital Surround Processor/Controller
System
Configuration
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The SDP-3 provides a Subwoofer Peak Limiter that prevents the
subwoofer signal level from exceeding a preset value. The limiter is
factory preset to the OFF postion. This setting can be changed within
the limiter’s operating range of -5dB to +35dB, with -5dB providing
maximum limiting.
To turn on the limiter or to change its setting, select the SUB PK
LIMITER parameter in the Output Levels menu.
Press ▼ to select LIMITER, then press SELECT. Press ▲ to select ON.
Press DONE twice to return to the Output Levels menu. While readjust-
ing the system volume to a comfortable listening level, check to be sure
the subwoofer or its amplifier is not overloading on passages with loud
low frequency peaks.
Selecting LIMITER ADJUST in the Sub Peak Limiter menu invokes a
calibration routine for setting the optimal peak level for your installation.
Pressing SELECT routes low frequency calibration noise to the
subwoofer output of the SDP-3. A two-line display indicates the LIM-
ITER LEVEL setting in dB on the top line with a bar at the bottom to
indicate relative noise level. Press ▲ and ▼ to adjust the noise level to
the highest level that your system can reproduce without overload.
Be sure the limiter is set to ON before exiting. Press DONE to exit and
automatically set the limiter to the level you have selected.
ON, OFF
-5dB to +35dB
▲▼Adjust with       orSUB PEAK LIMITER
LIMITER
LIMITER ADJUSTOFF
+15dB
!WARNING!
REDUCE SYSTEM VOLUME
BEFORE TURNING
LIMITER OFF
Subwoofer Peak Limiter
Dolby Digital (AC-3) and DTS encoded sources can produce low
frequency peaks that are much louder than those in matrixed Dolby
Surround decoding. These higher levels may be troublesome in the
home listening environment, either because they disturb non-listeners
in nearby rooms, or because of the inability of the subwoofer and its
associated amplifier to reproduce these levels without clipping.
Note that the Sub Peak Limiter is sepa-
rate from the Subwoofer  level control in
the Effect Adjust menus — one setting
does not affect the other.
Note that +00dB=85dB, in a properly
calibrated system. 
						

							JBL Synthesis
System
Configuration
28
Setting Listener Position
The Listener Position menu is used for setting the surround and center
delays and calibrating the Panorama effect.
SETUP MENU
INPUT CONFIG
SPEAKER CONFIG
OUTPUT LEVELS
LISTENER POSITION
LOCK SETTINGS
Mute Level
This menu allows you to set the level of attenuation used whenever the
SDP-3 MUTE function is engaged.  In the Output Levels menu,
attenuation levels of -10dB, -20dB, -30dB, -40dB, and FULL are
available.
Power On Volume
This control in the Output Levels menu allows you to select the volume
at which the SDP-3 will power on. You can choose from a range of -80
to +6dB, or elect to have the system power on at the last level used
(LAST LVL).
Zone 2 Power On Volume
This control in the Output Levels menu allows you to select the initial
volume level for Zone 2. You can choose from a range of -80 to +12dB,
or elect to have Zone 2 power on at the last level used (LAST LVL).
SPEAKER DISTANCE
A/V SYNC DLY
CALIBRATE PANORAMA
L/R BALANCE
ZONE 2 BALANCEbased on speaker distance
Off, 1 to 30ms
▲▼Adjust with        or
OFF
< | >
< | >
LISTENER POSITION
CAL NOISE,  SPEAKER ANGLE, LISTENER POS
[ _ _ _ | | _ _ _ ]
[ _ _ _ | | _ _ _ ]
Speaker Distance
The Speaker Distance control automatically sets the appropriate time
delays for all of the loudspeakers in a system. Although this adjustment
is not a substitute for proper speaker placement, it will help to ensure
accurate signal arrival times from all channels at the listening position.
To set up Speaker Distance, you may physically measure the distance
from the primary listening position to the front baffle of each individual
speaker in your system. An easy and accurate way to accomplish this
is to have a person sit in the primary listening position,  holding the end
of a measuring tape, while a second person extends the tape measure
to the front baffle of each speaker in turn.
To enter these values, select SPEAKER DISTANCE in the Listener
Position menu and press SELECT. Use ▲ and ▼ to highlight feet or
meters and press SELECT. Press SELECT again to highlight NEAR-
EST SPKR. Use ▲ and ▼ to enter the actual distance, then press
DONE. 
						

							SDP-3 Digital Surround Processor/Controller
System
Configuration
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Once you have entered the distance to the nearest speaker, the SDP-
3 will automatically calculate the maximum allowable distance. The
display will show all of the speakers, each with a default distance setting
equal to your nearest speaker. Use SELECT and ▲ and ▼ to highlight
and enter actual distances for each speaker. The SDP-3 rounds off
distance settings into discrete steps – choose the closest step to the
actual distance in these cases. If a speaker distance is further than the
SDP-3 can accommodate, set it to the maximum allowable distance.
(This will vary, depending on your intial entry for NEAREST SPKR.)
NOTE: Do not perform time alignment in the SDP-3 when using the
JBL Synthesis SDEC 1000/2500A Digital Equalizers. Time align-
ment will be adjusted automatically in the SDEC Digital EQ. If your
system has side and rear speakers, be sure to turn the rears off
prior to performing auto-time alignment with the SDEC Digital EQ.
A/V Sync Delay
A/V Sync Delay compensates for the delay that occurs when a video
processor, such as a scan rate converter, is used with the SDP-3. Most
of these processors alter the original audio/video timing relationship by
adding delay to the video signal as it is processed. A/V Sync Delay
applies a corresponding delay to the audio signal to restore the original
audio/video timing relationship. It can also be used to compensate for
poorly mastered source material.
If your video material appears to be out of sync, engage A/V Sync Delay
in the LISTENER POSITION menu. With a video source running, adjust
the delay along its 1-30ms range with ▲ and ▼.
Note that it is best to use a non-film source when setting A/V Sync Delay,
as film dialog added in post production may have poor timing relationships.
Calibrate Panorama
Panorama works by canceling the sound going from each speaker to
the opposite ear. Its effectiveness is highly dependent on the geometry
of your front loudspeakers, the room and your listening position. The
correct timing of the canceling signal varies with the relative angle
between your main speakers.
Find a mono source, such as an announcer on FM radio or a mono film,
and listen for a tightly focused center image of speech or singing. If the
image is off-center, adjust the SDP-3’s input balance controls.  (The
more centered the monaural image, the better Panorama will work.)
Select  CALIBRATE PANORAMA from the Listener Position menu to
display a sub-menu that allows you to turn on a calibration noise source,
configure the speaker angle, and adjust the listener position. 
						

							JBL Synthesis
System
Configuration
30
CAL NOISE is a special digitally generated signal to aid in calibrating the
Speaker Angle and Listener Position parameters. Note that in all cases,
sound will actually be produced by both front loudspeakers. The
adjustments affect the perceived directionality of the sound.
The SPEAKER ANGLE, displayed in degrees, adjusts for wide or
narrow speaker spacing (relative to the listening position). For the two
canceling signals to arrive at both ears at the same time you must be
centered precisely between the speakers.  It will be easiest to calibrate
this parameter if you start equidistant from the two front speakers, even
if this is not your normal listening position. Once you have heard the
effect and set the speaker angle, the Listener Position parameter will
allow you to “move” the effect to your customary listening position.
To set the Speaker Angle, center yourself symmetrically between the
two front speakers. Turn CAL NOISE on and select LEFT ONLY. The
test signal should sound as though it is coming from off to your left side,
well beyond the left speaker, with near-total silence in your right ear. Still
facing forward, move your head from side to side until the effect is
strongest. When you have found this sweet spot  you will notice an
almost physical sensation of silence in your right ear.
Now, select RIGHT ONLY. Again, shift your head from side to side to find
the sweet spot, this time looking for the point where the sound is
strongest in your right ear. Select LEFT AND RIGHT to determine if the
sweet spots  from the left and right tests coincide. If they do not coincide,
return to the SPEAKER ANGLE display. If the first sweet spot is to the
left of the second, press ▲ ; if it is to the right, press ▼.
When calibrating right, if your left ear is in the
silent band, the speaker angle is correct.
NOISE
SILENCE{
Move your head from side to side to find the
position where the noise is full left, and the
right ear hears near total silence.
NOISESILENCE{
SPEAKER ANGLE is the angle between the
main speakers as seen from the listening posi-
tion — here it is about 60°. LISTENER POS
allows you to adjust for an offset listening
position.
60°
L127. . .  Center  . . .  R127▲▼Adjust with        or
OFF
< | >
< | >
LISTENER POSITION
CAL NOISE

SPEAKER ANGLE
LISTENER POSOFF, LEFT ONLY, LEFT AND
RIGHT, RIGHT ONLY
10° - 118°
L127...CNTR...R127
SPEAKER DISTANCE
A/V SYNC DLY
CALIBRATE PANORAMA
L/R BALANCE
ZONE 2 BALANCE 
						

							SDP-3 Digital Surround Processor/Controller
System
Configuration
31
If your normal listening position is not centered between your two front
speakers, once you have corrected the speaker angle setting,  you can
"move" the sweet spot to that position. To do this, select  LISTENER
POS and use ▲ and ▼ to move the effect. As you adjust the position,
the display will indicate motion to the left of center
(L001,L002,L003...L127), CENTER, or to the right of center
(R001,R002,R003...R127). The numbers represent approximately
1/3", but are provided primarily as a general reference.
Panorama is now calibrated. Press DONE repeatedly to step back to the
main setup menu.
L/R Balance
This control allows you to adjust the left/right balance of the front, side
and rear main outputs. This control can also be accessed on the remote
by pressing and holding the Shift button and using DONE to move to the
left, and SELECT to move to the right.
Zone 2 L/R Balance
This control allows you to adjust the left/right balance of the Zone 2
outputs. This control can also be accessed on the remote by pressing
and holding the Record/Zone 2 button and using DONE to move to the
left, and SELECT to move to the right.
If the two silent bands are too close, lower the
Speaker Angle; if they are too far apart, raise
the Speaker Angle.