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manual abstract
2 Setup 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 INTRODUCTION The Atlas Sound MG2500 Sound Masking Processor provides a digital pink- noise 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. Sixteen presets can be recalled via contact-closures, RS-232, or other remote control options. The MG2500 carries a five-year warranty. MG2500 features include: ¦ pink-noise & audio input, with 2-channel DSP processor ¦ noise generator spectral purity (±0.1dB @ 0Hz~20kHz) ¦ precision pink-noise filtering (-3dB per octave low-pass) ¦ generator repeat time of noise (200 minutes) ¦ combined 1/3-octave & parametric equalization per channel ¦ selectable high & low frequency shelving filters per channel ¦ HPF & LPF with variable frequency & slope per channel ¦ leveling, compression, limiting, & soft-gating per channel ¦ output delay, with distance/delay calculation, per channel ¦ two independent matrixes for channel-to-channel mixing ¦ variable noise, input, & output levels with software metering ¦ sixteen non-volatile memory presets store/recall settings ¦ balanced input & outputs on plug-in barrier strip connectors ¦ software for Windows® 95/98/NT/2000/XP & cable included ¦ no manual controls on front panel, to prevent tampering ¦ remote control via RS-232 & programmable logic inputs ¦ incorporates AES recommended grounding practices ¦ marked and UL / C-UL listed power source ¦ covered by Atlas Sound’s five-year warranty 1 FRONT & REAR PANEL FEATURES MG250. Soun. Maskin. Processo. on output 1 inputoutput 2link port link logic inputs serial port 50/60 Hz ~27V 12 watts class 2 wiring Atlas Sound LP 1601 Jack McKay Blvd Ennis, TX 75119 Made in U.S.A. MG2500SoundMaskingProcessor On Indicator: When power is applied to the MG2500, this red LED will light indicating power to the unit is On. When power is turned off, all current settings will be stored in non-volatile memory and recalled when power is turned back on. NOTE: During setup the MG2500 may instead be set to recall a special preset whenever power is turned on (see Setup on pg. 10). AC Power Cord: The power transformer provides 27 Volts AC to the MG2500, and is detachable via a 5-pin DIN connector. The MG2500 has two internal ‘self-resetting’ fuses (there are no user serviceable parts inside the unit). If the internal fuses blow, they will attempt to re-set after a short period. However, this may be an indication that the MG2500 requires service. Serial Port: This 9-pin Sub-D (male) connector provides an RS232 Serial Port for remote control via computer or third-party controllers (see RS-232 Control on pg. 13). The Serial Port has the following pin assignments (left-to-right & top-to-bottom): Pin 1) not used; Pin 2) Receive Data (RxD) input; Pin 3) Transmit Data (TxD) output; Pin 4) Data Terminal Ready (DTR) output; Pin 5) Ground; Pin 6) not used; Pin 7) Request To Send (RTS) output; Pin 8) not used; Pin 9) not used. The default baud rate for the Serial Port is 38,400 (See RS-232 Control on pg. 13). Atlas Sound MG2500 software and a serial cable are provided for programming via Windows® 95/98/NT/2000/XP (see Setup on pg. 3). NOTE: The Serial Port can also transmit commands received via the Logic Inputs (see Setup on pg. 10). Link Port: This 9-pin Sub-D (female) connector provides a Link Port for RS-232 control of multiple ATLAS SOUND® MG2500’s (see RS-232 Control on pg. 13). The Link Port of one device simply connects to the Serial Port of the next device (and so forth). NOTE: All but the final MG2500 in a system should have the Link Switch pressed in (see below). The Link Port has the following pin assignments (right-to-left & top-to-bottom): Pin 1) not used; Pin 2) Transmit Data (TxD) output; Pin 3) Receive Data (RxD) input; Pin 4) not used; Pin 5) Ground; Pin 6) not used; Pin 7) not used; Pin 8) not used; Pin 9) not used. NOTE: The Link Port will also transmit commands received via the Logic Inputs (see Setup on pg. 10). Link Switch: The Link Switch is used when connecting multiple devices in a ‘Link Port to Serial Port’ configuration (see Link Port above). From the factory, the Link Switch is released (out). When connecting multiple devices, the Link Switch must be depressed (in) on all devices except the final device in the system (the device with no Link Port connection). NOTE: The Link switch must remain OUT when only a single device is being used. Logic Inputs: This 25-pin Sub-D (female) connector provides sixteen logic inputs for controlling the MG2500 via contact-closures (see Logic Inputs on pg. 12). Logic Inputs are programmed using the software and serial cable provided with the MG2500 (see Setup on pg. 10). NOTE: From the factory, Logic Inputs 1~16 have no pre-programmed function. Outputs 1 & 2: These plug-in b...