User manual QSC AUDIO DSP-4

[. . . ] DSP-4 Digital Signal Processor Amplifer Accessory Hardware Manual *TD-000103-00* TD-000103-00 rev. C IMPORTANT SAFETY PRECAUTIONS & EXPLANATION OF SYMBOLS The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous" voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in this manual. CAUTION: To reduce the risk of electric shock, do not remove the cover. Refer servicing to qualified service personnel. SAFEGUARDS ·Electrical energy can perform many useful functions. [. . . ] Do not overtighten. Do not use computer VGA cables as they are not correctly constructed for use with the DSP-4. QSC DataPort cables may be obtained through your QSC distributor or by calling QSC's Technical Services Department. XLR Connections Inputs- The audio input can be from one of two sources; the front-panel DataPort or the XLR input connectors. Do not use both sets of inputs at the same time!Inputs are electronically balanced with an impedance of 8. 3k ohms (balanced) or 3. 7k ohms (unbalanced). Input sensitivity is software-selectable from 1. 5 to 18 volts (rms) full-scale. Shield terminals connect to the chassis. Use balanced connections for the lowest possible noise levels and to minimize the possibility of hum-inducing ground loops. 10 Outputs- The DSP-4's post-processor audio is output to the rear-panel DataPort AND the XLR output connectors. The outputs are electronically balanced with an impedance of 600 ohms. Output level is software-selectable from 4 or 6 Vrms. The XLR out's can be used for daisy-chaining the processed audio to additional amplifiers, even when connected to a DataPort-equipped amplifier via the rear-panel DataPort. The maximum number of QSC amplifiers that can be connected to the DSP-4's outputs (including the output DataPort) is five. The effect on output level signal strength is about -3 dB when five QSC amplifiers are daisy chained. An additional +12 dB of output gain is available in software (OUT1 and OUT2 blocks). If making your own cables, please refer to the Appendix for proper pinout of the XLR connectors. Pinouts are provided for balanced and unbalanced configurations. RS-232 Connection RS-232 connection to the DSP-4 module is required for "setting up" a configuration. After being setup and the proper operation verified, the RS-232 connection is no longer needed. However, for "real time" adjustments, the RS-232 connection to the computer must be maintained. RS-232 PORT Connection1- Plug the 9-pin serial cable into the connector labeled RS-232 . Orient the DB-9 plug correctly, insert the plug fully into the RS-232 port and finger-tighten the retaining screws. 2- Plug the other end of the serial cable into an available COM port on your PC. DSP-4 setup and programming takes place via the RS-232 port. Any time setup changes are required to the DSP-4, it must be connected to its host computer through the RS-232 port. If "real-time" control of the DSP-4 is required, the RS-232 port connection must be maintained. If "real-time" control is not required, then the DSP-4 can be setup first and then disconnected from the PC. [. . . ] Powerlight series:PL1. 0 through PL4. 0 (all) PL6. 0 and PL9. 0 require modified DataPort cable between DSP-4 and amplifier. Powerlight 6. 0 and 9. 0 MUST have pin #9 removed from the Amplifier-to-DSP DataPort Cable (DPX-2) before use! ·Remote Mounting and External Power required. No DataPort Connection possible, Power Limiting not available. ISA series: The ISA amplifiers have a "V2" DataPort that may be used for audio inputs only. MX series: All PLX series: All RMX series All USA series: All ALL non-QSC amplifiers can be used with the DSP-4. 21 NOTES- 22 NOTES- 23 How to Contact QSC Audio Products Mailing address: QSC Audio Products, Inc. [. . . ]