White Instruments
Product: DSP 5024IQ
File: AE-DSP-5024-IQ.doc
20 February 1999
The Digital Signal Processor (DSP) shall have multiple functions, capable of creating: parametric filters, high-pass and low-pass filters and high and low shelving filters. In addition the unit shall be capable of furnishing digital delay, peak limiting and a crossover network section for each output channel.
Every aspect of the unit's adjustment shall be from its front panel controls and display. In addition to set-up via its front panel it shall be remote controllable by connecting its IQ interface to a computer, equipped with an IQ interface and running appropriate software from Crown International (IQ for Windows) or White Instruments (White Windows 1).
The DSP shall have at least ten storage memories and ten presets. These presets and memories shall be non-volatile and require no storage battery. It shall have a two-level password security scheme that will restrict access to the setup parameters while allowing access to recall the presets. A connector shall be provided for recalling presets by making dry contact closures. The unit shall include an IQ output interface for networking with other appropriately configured IQ equipment.
The DSP shall have two inputs and four outputs: all shall be active servo-balanced, that can be operated unbalanced without change in gain. The input and output connectors shall be XLR type. The unit shall be capable of operating at levels up to +27dBv with less than 0.05% THD distortion and noise shall be better than -96dBv at unity gain. The level of each channel shall be independently controlled in 0.5dB steps between -21dBu and +27dBu.
All filters generated by the DSP shall be assignable to either input or output with the exception of the crossover network filters. The unit shall be capable of generating at least thirty-five parametric filters between 20Hz and 20kHz in 1Hz steps with filter Qs adjustable between 0.2 and 100 in 0.1 steps and amplitude adjustable in 0.1dB steps between -60dB and +12dB. In lieu of one or more parametric filters the DSP shall generate high and low-pass filters at any frequency between 20Hz and 20kHz in 1 Hz steps with amplitude responses set in 6dB steps between 6dB and 24dB/octave. High and low shelving filters with 6dB/octave transition responses shall be generated at any frequency between 20Hz and 20kHz in 1Hz steps.
In lieu of one or more parametric filters, the 2-way, 3-way or 4-way crossover filters generated by the DSP shall have either Butterworth or Bessel or Linkwitz-Riley characteristics. Their frequencies shall be set in 1Hz steps between 20Hz and 20kHz and their amplitude response set in 6dB/octave steps (Linkwitz-Riley 12dB steps) between 6dB and 24dB/octave.
Each output channel shall include an intelligent limiter that can be invoked in lieu of two and one-half filters per channel. Each output channel shall feature up to 344 milliseconds of delay that can be adjusted on 20.8 microsecond steps. The use of delay shall not subtract from the maximum number of filters that can be created.
The power supply shall be on-board. The unit shall be capable of operating on either 115vac or 230vac, 50Hz or 60Hz, set at the factory. It shall require no more than 1.75 inches (1RU) of vertical space in a standard 19 inch EIA rack and require no more than 12 inches behind the front panel.
The unit shall be a model DSP 5024IQ manufactured by White Instruments, Austin, Texas U.S.A.