User manual BIAMP DDL12

[. . . ] ADVANTAGE® DDL12 Digital Delay Line Operation Manual ® Biamp Systems, 10074 S. W. Arctic Drive, Beaverton, Oregon 97005 U. S. A. (503) 641-7287 http://www. biamp. com 5/5/98 an affiliate of Rauland Borg Corp. DDL12 TABLE OF CONTENTS Front & Rear Panel Features Setup Logic Inputs RS-232 Control Applications Specifications & Block Diagram Warranty o variable input & output levels with metering & bypass mode o broad delay range useful for room delay or driver alignment o distance calculations & `automatic' unity gain for easy setup o 48kHz sampling rate with 16-bit sigma delta converters o 64x oversampling A/D (in) & 128x oversampling D/A (out) o eight non-volatile memory presets store/recall delay settings o programmable logic inputs for remote control via switches o no manual controls on chassis, to help prevent tampering o controls & indicators provided by software graphic interface o RS-232 serial port & Windows 95 programming software o incorporates AES recommended grounding practices o marked and UL / C-UL listed power source ® INTRODUCTION pg. 10 & 11 o 1-in/2-out DSP-based programmable dual-tap digital delay pg. [. . . ] Also, when sounds from the direct source & delayed source reach the listener at roughly the same volume level, additional delay (approximately 10~30 milliseconds) may be added to the calculated delay time. This added delay will produce what is known as the `Haas Effect', which gives the listener the impression that all sound is emanating from the direct source. This added delay should be fine-tuned by ear to achieve the desired results. 3 SETUP LOGIC INPUT & BUTTON DEFINITIONS SCREEN The Logic Input & Button Definitions screen is used to assign specific `recall preset actions' to the Logic Inputs (and remote control buttons). Logic Inputs allow remote control of preset selection via external circuits, such as switches, contact-closures, active driver circuits, and/or `open-collector' logic outputs (see Logic Inputs on pg. From the factory, Logic Inputs 1~8 are programmed to recall presets 1~8 respectively. However, using the Logic Input & Button Definitions screen, each Logic Input may be assigned different `recall preset actions'. Left-clicking on a numbered button will select that Logic Input to be defined. Left-clicking on Preset Action will open a drop-down menu of the available recall preset actions. Left-clicking the desired recall preset action will then assign that action to the currently selected Logic Input. Since Logic Inputs are controlled by switches, contact-closures, etc. , each Logic Input may be assigned certain recall preset actions to perform when the switch is `opened', and different recall preset actions to perform when that same switch is `closed'. Left-clicking on Echo Character opens a drop-down menu, which allows the `echo' character for the selected Logic Input to be changed. This is the RS-232 ASCII character which will be transmitted via the Serial Port whenever that Logic Input is switched. From the factory, no echo characters are assigned to Logic Inputs 1~8. Changing the echo character is used primarily for customizing remote control commands amongst various RS-232 controlled products within a system (see RS-232 Control on pg. NOTE: Unlike other remote controls, the DDL12 Logic Inputs do not include a `repeat' function. Therefore, a Logic Input in an `opened' or `closed' state will not continuously repeat an echo character via RS-232. Although the DDL12 does not accept infrared or wall-mount remote controls itself, it ® can still receive echo characters (via RS-232) from other ADVANTAGE products which are utilizing these types of remote controls. From the factory, Remote Control Buttons have equivalent ASCII characters permanently assigned to them (see RS-232 Control on pg. Therefore, recall preset actions can be assigned to Remote Control Buttons in the same way they are assigned to Logic Inputs. Leftclicking on Clear opens a drop-down menu, which allows recall preset actions to be cleared from the selected Logic Input (or all Logic Inputs). From the factory, Logic Inputs 1~8 are programmed to recall presets 1~8, respectively. However, each Logic Input may be assigned different `recall preset actions'. , using the PC Control Software and serial cable provided with the DDL12 (see Setup on pg. [. . . ] The computer should not echo the characters it receives. The computer should not be set for either hardware (DTR) or software (XON/XOFF) flow control. The baud rate may be changed to either 2400 or 19, 200 bits per second by means of the rear panel Baud Rate DIP switches. Link Port Connections: The 9-pin Sub-D (female) connector on the DDL12 rear panel provides the RS-232 compatible serial interface ® signals used for linking multiple ADVANTAGE products within a system. [. . . ]