JBL SYNTHESIS SDEC-1000 - Page 2

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Table of Contents3
Important Safeguards for Audio Products7
Introduction11
The Concept11
SDEC-1000 and SDEC-2500 Rear Panels12
What the SDEC Does13
Driver EQ13
Figure 1: Raw Driver Response/Corrected Driver Response13
Driver Time Correction14
Channel-To-Channel Distance Correction (Auto-Time Correction)15
Crossovers15
Figure 3: Effect of Auto-Time Correction15
Screen Correction16
Modes16
Room Correction EQ16
Figure 4: Effect of Screen Correction EQ16
Figure 5: Effect of Room EQ17
Location, Location, Location18
A Note on Wiring19
Wiring Connections to the SDEC20
Case I - Replacing an Analog Equalizer in an Existing Synthesis System20
Case II - Installing an SDEC as Part of a New Synthesis System Installation21
Power the System up for the First Time22
Operational Overview23
Stimulus23
Data Acquisition23
Data Post-Processing24
Display Data25
Make Corrections25
Target Curves25
Ideal Low-Frequency Response25
Ideal High-Frequency Response26
Figure 7: Synthesis 1 Main Target Curve, below 1Khz26
Figure 8: Complete Synthesis 1 Target Curve27
DACS4 Connections and Use28
Things to Consider When Selecting a Location for DACS428
Hookup29
Ac/Power Connections29
Figure 9: DACS4 Connection to Synthesis29
Audio Connections30
Other Connections30
Microphone Connection and Placement30
Room Placement30
How Is the Room Used31
Microphone #131
Now Place the Remaining Microphones31
Power up Synthesis and DACS433
Preliminary Surround Processor Settings34
Global Settings34
Mode Specific Settings34
DACS4 Operation35
Notational Conventions35
About Online Help35
[F-1] Help35
Starting DACS435
Initial DACS4 Screen36
Figure 11: DACS4 Opening Screen36
Enter Customer Information37
Figure 12: Customer Information Window37
Synthesis Model38
Select a Surround Processor38
Figure 14: Select a Surround Processor38
Center Screen Compensation39
Left/Right Compensation39
Figure 15: Identify Screen Type, Center Channel39
Figure 16: Identify Screen Type, Left & Right Front39
Confirm DACS4 Connections40
Figure 17: DACS4 on Screen Wiring Diagram40
DACS4 Main Screen41
Figure 18: DACS4 Main Calibration Screen41
Response Graph42
Filters at a Glance42
Figure 19: Response Graph Window42
Figure 20: Filter Setting and Control Field42
Individual Filter Control43
Channel and Mode Selection/Status43
Figure 21: Filter Control Field43
Figure 22: Direct Channel and Mode Access43
Overlay Previously Tested Channels44
Online Help44
Special Function Keys44
Figure 23: Channel Display Control Field44
Figure 24: Continuously Updated Online Help44
Figure 25: Function Keys and Status Line44
Figure 26: Channel Gain and Delay Information45
Calibration Walk-Through46
Figure 27: Fresh Install, First Screen46
Auto-Time Correction47
Figure 28: Auto-Time Correction Dialog Box47
Cinema, Subwoofer Calibration48
Figure 29: Ready for Subwoofer Level Test48
Setting the Level49
Figure 30: Setting Level49
Figure 31: Without Smoothing Filter49
Auto-Equalization50
Figure 32: Results of Auto-EQ50
Cinema, Left - Center - Right Calibration51
Setting the Level51
Figure 33: Left Cinema Level Set51
Run Auto-EQ52
Left and Right Ambient Calibration52
Figure 34: Auto-EQ52
Setting the Level53
Music Mode Calibration53
Figure 35: Ambient Target53
Quitting DACS454
After a Complete Calibration54
Quitting When some Channels Are Not Accepted54
SDEC Maintenance54
Using the Loader Utility54
Troubleshooting55
Correcting Hum Problems55
Why Does It Hum in the First Place55
What You Can Do During Installation55
Video Devices56
Specifications57
Synthesis One Interconnection Diagram58
Synthesis Two and Three Interconnection Diagram60

JBL SYNTHESIS SDEC-1000 - Page 2

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