Atlas Sound MG2500 Sound Masking Generator with 2-Channel DSP and Page Input Operation Manual Atlas Sound, 1601 Jack McKay Blvd., Ennis, TX 75119 U.S.A. (800) 876-3333 http:// www.AtlasSound.
blank May 2002
MG2500 INTRODUCTION TABLE OF CONTENTS Front & Rear Panel Features Setup pg. 2 pgs. 3~11 Logic Inputs pg. 12 RS-232 Control pg. 13 Specifications & Block Diagram pg. 14 Warranty pg.15 Leveler FAQ’s pg. 16 The Atlas Sound MG2500 Sound Masking Processor provides a digital pinknoise generator, a balanced line-level audio input, and a 2-channel DSP processor, all in a single rack-space unit. Noise & audio levels, plus two channels of EQ, gain management, & delay, are adjusted via computer software.
FRONT & REAR PANEL FEATURES MG2500 Sound Masking Processor ~ 27V 50/60 Hz serial port 12 watts class 2 wiring MG2500 on Atlas Sound LP 1601 Jack McKay Blvd Ennis, TX 75119 Sound Masking Processor link port link logic inputs output 2 output 1 Made in U.S.A. input On Indicator: When power is applied to the MG2500, this red LED will light indicating power to the unit is On.
SETUP ® MG2500 parameters are all adjustable using the Windows 95/98/NT/2000/XP software and serial cable provided with the unit. The MG2500 program includes several control screens, which are described on the following pages. Once the software is started (and Comm Port Configuration is set), the control screens are accessed via the drop-down menus at the top of the opening screen. The Main screen appears whenever an MG2500 file is opened.
SETUP GAIN MATRIX #1 SCREEN The Gain Matrix #1 screen provides a channel-to-channel (2x2) mix matrix, which can be used to adjust the amount of Input & Noise signal being routed to each of the processing channels (Output 1 & Output 2). From the factory, Input 1 is routed to Output 1 only, and Noise is routed to Output 2 only, providing two independent signal paths. Levels are adjusted by dragging the corresponding ‘faders’ up or down.
SETUP GAIN MANAGER SCREEN The Gain Manager screen is used to adjust Leveler, Compressor, Limiter & Soft Gate settings for each of the processing channels (Output 1 & Output 2). Threshold adjusts the signal level at which the Leveler, Compressor, & Limiter functions are triggered. Therefore, these controls determine the amount and type of gain processing to be applied to the signals. The Leveler controls the long-term average signal level.
SETUP PARAMETRIC EQ SCREEN The Parametric EQ screen is used to adjust equalization for each of the processing channels (Output 1 & Output 2). Up to 28 bands of equalization, plus high-pass & low-pass filters, are available per channel. NOTE: Parametric & Graphic equalization techniques may be used simultaneously on the same channel, as long as the total number of bands per channel does not exceed 28. Frequency selects a center frequency for the current band.
SETUP GRAPHIC EQ SCREEN The Graphic EQ screen is used to adjust equalization for each of the processing channels (Output 1 & Output 2). Up to 28 bands of equalization, plus high-pass & low-pass filters, are available per channel. NOTE: Parametric & Graphic equalization techniques may be used simultaneously on the same channel, as long as the total number of bands per channel does not exceed 28. Default operation of the Graphic EQ is 1/3-octave, 28-bands, and ISO standard center frequencies.
SETUP GAIN MATRIX #2 SCREEN The Gain Matrix #2 screen provides a channel-to-channel (2x2) mix matrix (identical to Gain Matrix #1), which can be used to adjust the amount of signal being routed from each channel to the other. From the factory, Channel 1 is routed to Output 1 only, and Channel 2 is routed to Channel 2 only, providing two independent signal paths. Levels are adjusted by dragging the corresponding ‘faders’ up or down.
SETUP DIGITAL DELAY SCREEN The Digital Delay screen is used to adjust delay time settings for each Output. Delay time is shown in the window, with adjacent buttons providing the up/down adjustments. Coarse buttons change the delay time in 1 milli-second increments. Fine buttons change the delay time in 21 micro-second increments. Delay time may also be entered directly into the window, but will be rounded to the nearest available setting.
SETUP LOGIC INPUT DEFINITIONS SCREEN The Logic Input Definitions screen is used to assign specific ‘actions’ to the sixteen Logic Inputs. Logic Inputs allow remote control of the MG2500 via external circuits, such as switches, contact-closures, active driver circuits, and/or ‘open-collector’ logic outputs (see Logic Inputs on pg. 12). From the factory, Logic Inputs 1~16 have no pre-programmed functions. However, using the Logic Input Definitions screen, each Logic Input may be assigned various ‘actions’.
SETUP CONFIGURATION OPTIONS SCREEN The Configuration Options screen is used to select options which customize the operation of the MG2500. At the top of the Configuration Options screen, the Serial Number and Firmware Version of the MG2500 will be displayed. MG2500 software can operate ‘off-line’ (with no product connected) by opening a ‘new’ file. The Serial Number and Firmware Version are not displayed for ‘new’ (‘off-line’) files.
LOGIC INPUTS Sixteen Logic Inputs are available on a rear panel 25-pin Sub-D (female) connector. Logic Inputs allow remote control of the MG2500 via external circuits, such as switches, contact-closures, active driver circuits, and/or ‘open-collector’ logic outputs. From the factory, Logic Inputs 1~16 have no pre-programmed function. However, each Logic Input may be assigned different ‘actions’ using the MG2500 software and serial cable provided with the unit (see Setup on pg. 10).
RS-232 CONTROL Serial Port: The 9-pin Sub-D (male) connector on the MG2500 rear panel provides the RS-232 compatible serial interface signals used for computer control. The MG2500 Serial Port transmits serial data on pin 3 (TxD), receives serial data on pin 2 (RxD), and provides a ground on Pin 5. The Data Terminal Ready (DTR) & Request To Send (RTS) output signals are connected to the +12 Volt power supply (through a resistor) and are always asserted when the MG2500 power is on.
SPECIFICATIONS & BLOCK DIAGRAM Frequency Response (20Hz~20kHz @ +4dBu): +0/-0.5dB Sampling Rate: THD+Noise (20Hz~20kHz @ +4dBu): < 0.002% A/D & D/A Converters: > 100dB Power Consumption: Dynamic Range (20Hz~20kHz): Maximum Gain: 20dB Input Impedance (balanced): Output Impedance (balanced): Maximum Output (balanced): < 15 watts height (1 rack space) 1.75” (44mm) +24dBu width 19” (483mm) 200 ohms depth 7” (178mm) +24dBu Weight: 4.5 lbs. (2.
WARRANTY ATLAS SOUND IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL. Limited Warranty: All products manufactured by Atlas Sound are warranted to the original dealer/installer, industrial or commercial purchaser to be free from defects in material and workmanship and to be in compliance with our published specifications, if any.
Q: What is this ’Leveler’ inside the MG2500? The Leveler function, in the Gain Manager section of an MG2500, is an automatic gain control (AGC). This means that the Leveler automatically adjusts volume levels up or down to compensate for signals that are softer or louder than normal.
