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dbx Pro 386 user manual Appendix A, Sync Input Info, User Manual, Fig. A.1

Models: 386

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Appendix A

Appendix A		Sync Input Info	386
		Sync Input Info

Sync Input Info

The dbx 386 comes with the word input 75Ω terminated. For certain configurations, you may wish to have the sync input be unterminated. Certain "house sync" configurations will require you to change the default position of the termination jumper on the main circuit board. For example, if you run your sync to several pieces of equipment using a tapped configuration (using BNC T’s) as shown below, only the last box, box C, would be terminated (marked "75 ohm terminated" on the circuit board). Unfortunately, some equipment does not allow the user to change the termination setting. These pieces of equipment are usually provided with a per- manent termination. If you use the 386 with another piece of terminated equipment in tapped configuration, you should unterminate (marked "unterminated" on the circuit board) the 386’s sync input. The same is true if you wish to use several 386’s in a tapped configuration. See Fig. A.1 for the location of termination jumper.

Tapped Configuration

Sync Source

A

386

C

Fig. A.1

Location of sync input termina- tion jumper. “Terminated” selection is shown.

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18	386 User Manual

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dbx Pro 386 user manual Appendix A, Sync Input Info, User Manual, Fig. A.1

Contents

w/Digital Out Tube PreampDual Vacuum User ManualWIRE COLOR IMPORTANT SAFETY INSTRUCTIONSSAFETY INSTRUCTIONS CLEAN ONLY WITH A DAMP CLOTHU.K. MAINS PLUG WARNING LITHIUM BATTERYELECTROMAGNETIC COMPATIBILITY ADVARSELIntroduction Table of ContentsTable of Contents 386 User Manual Section 1 - Getting StartedWARRANTY INFO 386 DEFINEDINTRODUCTION CUSTOMER SERVICE INFOSelectable mic/line switch 48 volt phantom power 20 dB pad Introduction0.1 Defining the 75 Hz low cut filter Phase reverseIf you require technical support, contact dbx Customer Service. Be prepared to accurately describe the problem. Know the serial number of your unit - this is printed on a sticker attached to the rear panel. If you have not already taken the time to fill out your warranty registration card and send it in, please do so now 0.2 Service Contact Info0.3 Warranty IntroductionIntroduction 0.4 Installation RecommendationsInstall the 386 in your rack with the provided rack screws. It is essential that when the 386 is being mounted in a rack mounting enclosure, the unit should be positioned with enough room at least one centimeter at the top and one centimeter at the bottom of the unit to allow prop- er ventilation. The 386 should not be mounted above or below anything that generates exces- sive heat. Ambient temperatures should not exceed 1130F 450C when equipment is in use. Although the unit is shielded against radio frequency and electromagnetic interference, extreme- ly high fields of RF and EMI should be avoided where possible Started SectionGetting Getting StartedAES/EBU Digital Connector Power SwitchIEC Power Cord Receptacle S/PDIF Digital Connector20db Pad Switch Line Select Switch+48 Volt Switch Phase SwitchShape Switch Meter Select SwitchDither Switch Sample Rate SwitchANALOG APPLICATIONSANALOG APPLICATIONS Section2.2 Connection to a Mixing Console Analog Applications2.1 Basic Analog Connection of the SectionAnalog Applications 2.3 Direct Connection to a RecorderSection 1. Make microphone connections, being careful to keep the DRIVE control in the minimum +30 dB positionPage Section DIGITAL APPLICATIONSDIGITAL APPLICATIONSDither Switch Digital Applications 3.1 Digital Output Front Functions of the3.2 Digital Output Rear Panel Connections Shape SwitchAES/EBU Digital Connector Digital Applications3.3 Sync Input Sample Rate Selection S/PDIF Digital ConnectorRear Panel Connections Front Panel Digital Output Features3.4 Direct Connection to a DAW CPU SectionFront Panel Digital Output Features SectionDirect Connection to a Digital Mixer Digital ApplicationsSection Digital Applications 3.6 A/D ConversionFront Panel Digital Output Features Rear Panel ConnectionsSection Multi-Tracking to DigitalFront Panel Digital Output Features Digital ApplicationsSection Digital Applications 3.8 Analog and Digital Output ApplicationFront Panel Digital Output Features Rear Panel ConnectionsSync Input Info Block Diagram APPENDIXSpecifications APPENDIXSync Input Info Appendix ASync Input Info 386 User ManualBlock Diagram Appendix BBlock Diagram 386 User ManualType IV White Paper Appendix Cdbx Type IV Conversion System White Paper by Roger Johnson386 User Manual Appendix CType IV White Paper 386 User Manual Appendix CType IV White Paper Appendix C Figure 3a - Signal Having Low and High Frequency ContentFigure 3b - Signal of Fig. 3a Going Beyond the A/D Clip Level Type IV White PaperAppendix C High-Frequency Information Completely Lost High-Frequency ContentA/D Clip Level Low-Frequency Content Type IV White PaperD.2 Truncation Appendix DAppendix D.1 Noise-Shaping AlgorithmsAppendix D.3 SpecificationsAppendix D A Harman International Company Questions or comments? Email us at customer@dbxpro.comor visit our World Wide Web home page at 8760 South Sandy Pkwy Sandy, Utah Phone 801 Fax 801 Int’l Fax 603