Summary of the content on the page No. 1
Digital Audio Products
ne24.24M
24 Bit Digital
Multiple Channel
Matrix Processor
WR-1, WR-2, WR-5 Remote Controls
GPO General Purpose Logic Output Option
Operating Manual
ASHLY AUDIO INC.
847 Holt Road Webster, NY 14580-9103 Phone: (585) 872-0010
Toll-Free: (800) 828-6308 Fax: (585) 872-0739 www.ashly.com
Summary of the content on the page No. 2
Operating Manual - ne24.24M Matrix Processor Table Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 AC POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 FRONT PANEL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of the content on the page No. 3
Operating Manual - ne24.24M Matrix Processor 10 REMOTE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 10.1 WR-1 Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 10.2 WR-2 Contact Closure Preset Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 10.3 WR-5 Programmable Zone Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 11 GPO LOGIC OUTPUT WIRING .
Summary of the content on the page No. 4
Operating Manual - ne24.24M Matrix Processor 1. INTRODUCTION Thank you for your purchase of the Protea ne24.24M. The Protea ne24.24M Matrix Processor uses modular expansion cards to provide up to twenty-four channels of audio matrixing and processing, along with provisions for remote control and logic output. The base unit offers a four-input/four-output configuration. Each input and output expansion card has individual DSP processing allowing expansion of the base unit’s total inputs or out
Summary of the content on the page No. 5
Operating Manual - ne24.24M Matrix Processor 4. FRONT PANEL FEATURES 4.1 RS-232 Dataport The ne24.24M has two RS-232 dataports wired in parallel, one on the front panel and one on the back, for connect- ing to a computer for software control. See section 7.3 for details on connecting to a computer. 4.2 Com LED This green LED lights for a few seconds whenever there is communication activity to the unit from a host PC. 4.3 Preset Number This LED and switch select and display the current ne24
Summary of the content on the page No. 6
Operating Manual - ne24.24M Matrix Processor 5. REAR PANEL FEATURES 5.1 Input Connections Balanced input signals are connected to the ne24.24M using the included euroblock connector. A flat blade screwdriver is required to connect a stripped wire lead to the external connector piece, which is then inserted into the rear panel Euro Block receptacle. It is important that both (+) and (-) inputs are prop- erly terminated or signal loss and noise may result. In other words, if an unbal- Eurobl
Summary of the content on the page No. 7
Operating Manual - ne24.24M Matrix Processor To use contact closure switching, up to eight presets (1-8) must first be defined according to the needs of the installation. To use the mic input “Push To Talk” feature, select the “Push To Talk Mic” checkbox in the Protea NE Software’s mic preamp dialog box. The preset recall feature for that contact closure is then deactivated. Switches are to be configured so that closing the switch contact triggers the preset recall event. It doesn't matter i
Summary of the content on the page No. 8
Operating Manual - ne24.24M Matrix Processor 5.8 Data In/Data Out Connection The Data In and Out connectors are used for connecting the ne24.24M to the Ashly WR-5 active wall remote controller or RD-8C. 5.9 Factory Reset Switch Factory reset is used to clear all user defined preset names and control values and reset them to their original factory settings. Factory reset to the ne24.24M is accomplished by pressing and holding a recessed switch on the back panel during power up. The switch is
Summary of the content on the page No. 9
Operating Manual - ne24.24M Matrix Processor 5 5 4 Expansion Card Assembly: *See ESD Precautions First 1.) Plug ribbon cable into 2 1 motherboard header 2.) Plug other end of ribbon cable into expansion slot 3.) Slide pcb fingers into Flatcable(s) slots on back of meter card to 4.) Fit Euroblock connectors through back panel cut-outs Motherboard 5.) Fasten two back panel screws EXP4 EXP3 EXP2 EXP1 Expansion Card #4 Expansion Card #3 Expansion Card #2 Expansion Card #1 Inputs 17-20 Input 13
Summary of the content on the page No. 10
Operating Manual - ne24.24M Matrix Processor 7.2 Connecting the ne24.24M to a computer using Ethernet Ethernet is the preferred data protocol for computer control. A standard RJ-45 jack is used for connecting directly to a PC, PDA, or 10/100 Base-T network. 7.3 Connecting the ne24.24M to a computer using the RS-232 Dataport The ne24.24M is optimally designed for use with ethernet control, however it remains backward compatible to systems using RS-232 control. In other words, older Protes Syste
Summary of the content on the page No. 11
Operating Manual - ne24.24M Matrix Processor 8.1c Phantom Power +48V Phantom power for condenser microphones can be provided to individual channels by checking the <+48V Phantom Power> box in the preamp block for a given channel. 8.1c Push To Talk Mic This check box and drop down menu selects the back panel logic input to serve as a contact closure input channel engage. 8.1d Input Gain Different from the Preamp block, input Gain adjusts signal level from +12dB to Off. Due to limitations with
Summary of the content on the page No. 12
Operating Manual - ne24.24M Matrix Processor on either side of the fre- quency center is boost or cut, whereas a larger "wider" bandwidth (lower Q) pro- duces an audible change to the overall tone of a signal. Parametric filters are best used to hunt down and elimi- nate problem feedback fre- quencies, add or remove a characteristic "hot spot" from microphones, or clean up room resonance situations. It is well worth the time becom- ing proficient with paramet- ric EQ filters, as they offer the
Summary of the content on the page No. 13
Operating Manual - ne24.24M Matrix Processor is 0 degree phase shift, at the All Pass filter center frequency there is -180 degrees of phase shift, and at high frequencies there is -360 degrees of phase shift. Each input channel has an EQ On/Off button for all filters, and in turn each filter band has its own bypass button. The Flatten Curve function returns all filters to 0dB, but preserves the frequency and bandwidth of any used filters. 8.1g Noise Gate Noise gates are used to minimize unwan
Summary of the content on the page No. 14
Operating Manual - ne24.24M Matrix Processor 8.1i Ducker A Ducker is used to attenuate the level of selected input channels when one or more "Trigger" inputs have signal present. Input channels can be set to one of four ducker modes: 1.) BYPASS - no ducking action applies. 2.) DUCKED PROGRAM - signal present on other "Trigger" selected input chan- nels act to attenuate this input channel. 3.) LOW PRIORITY TRIGGER - signal present on this input channel attenuates all other inputs set to "Duc
Summary of the content on the page No. 15
Operating Manual - ne24.24M Matrix Processor 8.2b Hpf/Lpf - Crossover Bandpass or crossover func- tions on the Protea ne24.24M are available only on the output chan- nels. Every channel's crossover consists of a high pass filter (HPF) and a low pass filter (LPF), along with the frequencies and filter types used. Each output's cross- over section is essentially a bandpass filter, making it neces- sary for the user to map out ahead of time which outputs will be used for the various frequency ba
Summary of the content on the page No. 16
Operating Manual - ne24.24M Matrix Processor Bessel These filters, as implemented on the ne24.24M, are always -3dB at the displayed crossover frequency. Bessel filters are used because they have a maximally flat group delay. Stated another way, Bessel filters have the most linear phase response. When a Bessel HPF and LPF of the same crossover frequency are summed, the combined response is +3dB for 12dB/oct, 18dB/oct, and 48dB/oct Bessel filters, and -2dB for 24dB/oct Bessel filters. One of t
Summary of the content on the page No. 17
Operating Manual - ne24.24M Matrix Processor 8.2f Output Compressor/Limiter A full function compressor/limiter is included on each out- put channel. A limiter is commonly used to prevent transient audio signal spikes from damaging loudspeakers, manage ana- log and digital recording levels, optimize broadcast levels, or "thicken" the sound of an audio source (compression). The ad- justable parameters include Limiter In/Out, Threshold, Ratio, Attack Time, Release Time, and Link Group, and Atten
Summary of the content on the page No. 18
Operating Manual - ne24.24M Matrix Processor Since there are no user controls on the ne24.24M, the only way to load presets is by using Protea NE Software to recall files saved on either the PC or the ne24.24M. The exception to this is through the use of contact closures or the Ashly WR-5 wall-mounted remote control. Contact closures can load presets 1-8 from the ne24.24M memory using switches wired to the rear panel contact closure connector block (see sec. 5.4). Note: A preset recall event
Summary of the content on the page No. 19
Operating Manual - ne24.24M Matrix Processor In addition to using a WR-1 as the control device, the remote level control feature can be used for relay activated muting of selected channels, as in a fire alarm application (see sec. 16). Note: Use Protea System Software version 6.1.4 or higher, and ne24.24M program version 1.5 or higher to allow assignable remote control. Level control is "attenuate only" meaning that the maximum setting of the control potentiometer (fully clockwise) results in
Summary of the content on the page No. 20
Operating Manual - ne24.24M Matrix Processor WR-1 Wiring Diagram WR-2 Wiring Diagram 1 2 3 4 ASHLY WR-2 1 2 Common* 1 *Ch. 2 Gnd/+5 Are Wired To Ch. 1 Gnd/+5 1 On WR-1 PCB. 2 2 G* CV-2 +5* G CV-1 +5 Connector on 24.24M 3 Back Panel 3 4 4 Common* CV-1 To Pin 1-8 CV-2 To Pin 1-8 C *Wired Together On WR-2 PCB. Connector on 24.24M Back Panel To Pin 1-8 for Preset Recall 20
