Peavey Electronics Corporation CEQ 280a Manual

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Peavey Electronics Corporation

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Page 1 Cover for CEQ 280a Peavey Electronics Corporation...
Page 2 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 persons. Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
Page 3: Table Of Contents
Remote Recall of Stored EQ Curves ................27 7.5e Stereo Slave ........................27 7.5f Dump EQ Curves to Another CEQ 280a ..............28 7.5g Dump EQ Curves to a MIDI Storage Device ............... 29 7.5h Loading EQ Curves ......................30...
Page 4 Setting the MIDI Switches ....................32 The Security Lock ....................... 33 User Access ......................... 34 ™ USING THE CEQ 280a WITH THE CEQ 280Ra ..............34 MIDI IMPLEMENTATION ...................... 35 10.0 SYSTEM EXCLUSIVE ......................36 11.0 RECOMMENDED CONNECTIONS ..................39 12.0 FLOWCHART ..........................
Page 5: Introduction
When used in a studio setting, the CEQ 280a allows many curves to be stored and compared to find the perfect EQ. And, because the CEQ 280a changes quietly from one curve to the next, EQ curves can be changed in the middle of a song.
Page 6: Front Panel
FRONT PANEL 1. EQ Access manual Equalization functions including: EQ adjustment, EQ curve compare, set EQ flat, add a curve, and EQ curve with RTA display of the EQ output signal. 2. RTA Access to mic input, Real-Time Analyzer, and auto equalization functions including: RTA display, mic input level adjustment, microphone compensation curve selection, microphone curve creation, room response “target”...
Page 7: Back Panel
MIDI data received at the MIDI In jack. This means the receiving unit(s) will receive an exact copy of the data the CEQ 280a received. This is an option that may be turned off and on in the MIDI section of the Global menus.
Page 8: Basic Connections
This diagram shows how to connect the CEQ 280a and your sound system together. Connecting for Pink Noise The following diagram shows how to connect the CEQ 280a into your sound system to use the pink noise source for equalization.
Page 9: Connecting To A Mixer Effects Loop
After a brief pause the screen will change to the EQ display. OPT ⁄ ⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄ DSPL‡ ‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡ Note: The EQ display is the main display for the CEQ 280a. Pressing the EQ button or repeatedly pressing the “EXIT” soft button will always return you to this display. Peavey Electronics Corporation...
Page 10: Selecting And Editing Parameters
Selecting and Editing Parameters This manual takes the approach that the best way to learn how to operate the CEQ 280a is through example. The following section will show you how to adjust the view angle, and in the process you will learn how to select parameters and how to change their settings.
Page 11: Adjusting The View Angle
Most sound reinforcement speaker systems do not have a usable response below 40 Hz. Amplifying signals below this frequency wastes amplifier power and risks damage to the speaker system. The CEQ 280a has a built-in, 40 Hz, low-cut filter that reduces the amplitude of these signals. The subsonic filter is generally left on for most sound reinforcement applications.
Page 12: Eq Range
EQ Range The CEQ 280a EQ can be set up to operate in ±6 dB or ±12 dB mode. In the ±6 dB mode the EQ adjustment is made in 0.5 dB steps; in the ±12 dB mode the EQ adjustment is made in 1 dB steps.
Page 13: Level Adjustment
⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄⁄ DSPL‡ ‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡‡ LEVEL The goal is to adjust the level of the signal passing through the CEQ 280a so it is the same when the CEQ 280a EQ is bypassed or in use. Bypass the EQ The BYPASS button activates a relay that directly connects the input and output jacks to provide a complete bypass of the CEQ 280a equalizer.
Page 14: Recalling Eq Curves
RECALL COMPLETE The CEQ 280a will stay on the Recall display until the “EXIT” soft button or another system button is pressed. Note: It is possible to add a second curve to the one selected to get the combined response of the curves. For detailed information see section 7.4.
Page 15: Compare Eq Curves
1. Turn on the system mics to their normal operating level. Be sure to avoid feedback. 2. Connect the pink noise source (labeled “Noise Source” on the rear of the CEQ 280a) to a mixer input. Set the EQ flat on that input or if possible turn off the EQ on that channel.
Page 16 For best results, make sure the microphone is placed at ear level. Notice that the “gray area” remains in or near the center of the room regardless of the room shape. 5. Press the RTA button on the CEQ 280a. LEVEL- --------------------------EQ DSPL ˝...
Page 17 For approximately 1 ⁄ minutes the CEQ 280a will adjust itself to try to get the RTA display on the screen to look like the target response curve you selected. When it has completed the sample, the start sample 02 display will appear. Move the microphone to another location in the room and press the “START”...
Page 18 EQ curve from the continuous sample and average it with the discrete EQ curve captured earlier. It is important to note that the CEQ 280a places much more emphasis on the “current” EQ (in this case the discrete sample taken earlier) ™...
Page 19: Eq Display With Rta
Press the RTA button twice, the following display will appear. Use the up and down arrow buttons to select the desired rate. AUTO RTA PARAMETER: EXIT *MED DECAY DISPLAY RANGE 24dB Press the EQ button and “DSPL” soft button to return to the EQ RTA display. Peavey Electronics Corporation...
Page 20: The Feedback Finder
ADVANCED OPERATIONS This section deals with the more advanced uses for the CEQ 280a. It is not intended for everyone and is not necessary for simple application but as you become familiar with the CEQ 280a, reading this section may help you get the most from this product.
Page 21: Creating A Microphone Curve
*INSTR The CEQ 280a defaults to “INSTR” because it is a flat curve. You can change this to use any of the stored curves as a starting point. Use the up and down arrow buttons to select the curve with which you want to start.
Page 22: Room Target Curve Selection/Creation
*FLAT The CEQ 280a defaults to FLAT because it is a flat curve. You can change this to use any of the stored curves as a starting point. Use the up and down arrow buttons to select the curve with which you want to start.
Page 23: Combining Two Eq Curves By Addition
Overview The CEQ 280a provides you with the capability to add two curves together. This allows you to create separate room and effects EQ curves and store each of them so they can later be combined. You could use this feature, for example, to add small amounts of high frequency boost or cut to an existing room EQ curve.
Page 24: Storing
To add two curves: 1. If you are not on the EQ main display page, press the EQ button to go there. 2. Press the “OPT” soft button. NEXT CURR PROGRAM 116 *ADD --- EXIT TomU 3. This display indicates that currently no curves are added. Press the left or right arrow button until the cursor is alongside “ADD”...
Page 25: Recalling
MIDI Overview The MIDI implementation on the CEQ 280a opens the door to many creative applications. Stored curves can be recalled via MIDI, individual EQ bands and controls can be adjusted via MIDI, and stored curves can be sent and received.
Page 26: Factory Default Settings
5. If you want to turn the Omni mode on, use the left arrow button to select “OMNI MODE” and toggle it from OFF to ON. The Omni setting allows the CEQ 280a to respond to valid MIDI commands received on any channel.
Page 27: Remote Recall Of Stored Eq Curves
(e.g., if you dump preset 5 from one CEQ 280a to another, it will be loaded to preset 5 in the receiving CEQ 280a).
Page 28 This indicates that a successful dump is in progress. Receiving MIDI System Exclusive Message To dump a single preset from one CEQ 280a to another: 1. Press the GLOBAL button. 2. Use the left and right arrow buttons to position the cursor alongside “MIDI SYS-EX.”...
Page 29: Dump Eq Curves To A Midi Storage Device
Dumping EQ curves to a MIDI storage device, such as the Peavey MIDI Streamer, is similar to dumping them to another CEQ 280a. If you already have a request string setup in the MIDI Streamer, you can use the MIDI Streamer to request a dump of the EQ curves.
Page 30: Midi Send/Receive Filter
To dump a preset from one CEQ 280a to another and have it load into a different preset number in the receiving unit: 1. Press the GLOBAL button. 2. Use the left and right arrow buttons to position the cursor alongside “MIDI SYS-EX.”...
Page 31: Midi Thru
(unaltered) to the rest of the MIDI chain. If you use the CEQ 280a to control one or more Peavey CEQ 280Ras, it is best to leave the MIDI Thru option turned off. This is turned off/on in the MIDI Send/Receive display (see previous section).
Page 32: Setting The Midi Switches
EQ RANGE CC 065 3. The CEQ 280a comes from the factory with the subsonic filter set to controller 64 and the EQ range set to controller 65. These can be changed to any controller number (between 29 and 120) you want.
Page 33: User Access
ACCESS CODE 0000 Pressing either the up or down arrow button will lock the CEQ 280a. You can then choose to unlock MIDI or unlock recall of stored curves, and establish the four digit user access code. If you choose to unlock Recall, you can then set the number of the highest curve that can be recalled.
Page 34: Using The Ceq 280A With The Ceq 280Ra
USING THE CEQ 280a WITH THE CEQ 280Ra The CEQ 280a, like its predecessor, can control the CEQ 280Ra. To set up the CEQ 280a to control a CEQ 280Ra: Press the GLOBAL button. Select “ASSIGN.” Position the cursor alongside “REM#1” and change this to the number of CEQ 280Ras that will be controlled (up to sixteen CEQ 280Ras can be controlled by the CEQ 280a, “1”...
Page 35: Midi Implementation
: Active Sense : Reset Notes Mode 1 : OMNI ON, POLY Mode 2 : OMNI ON, MONO O : Yes Mode 3 : OMNI OFF, POLY Mode 4 : OMNI OFF, MONO X : No Peavey Electronics Corporation...
Page 36: System Exclusive
10.0 SYSTEM EXCLUSIVE This section contains the format of the system exclusive commands used by the CEQ 280a. The range of valid values is also listed for most of the data in the message descriptions. The description of the bit functions of status bytes and other data range information is listed at the end of this section.
Page 37 39 bytes current data in program preset format 6. Dump Current EQ (8 bytes) When received, the CEQ 280a sends a “Load Current EQ” message with the current EQ data. Dump current EQ command byte 7. Set MIDI controller numbers This message assigns MIDI control numbers for control of the EQ band levels, subsonic filter and EQ range.
Page 38 ADD ON/OFF Don’t care Note: The CEQ 280a displays the program presets (0-127) as 1 to 128. The system exclusive data in messages 1 and 3 are transmitted a nibble at a time. The high nibble (top 4 bits) is transmitted first, followed by the low nibble.
Page 39: Recommended Connections
Input/Output Connections The inputs and outputs on the CEQ 280a are a “transformer like,” electronically balanced circuit. When used in an unbalanced application, be sure not to leave pin 2 or 3 on the XLR connector, or the plug on the 1/4″ connector, unconnected.
Page 40 6/12 dB Bypass EQ In Relay 28 band Subsonic Filter Real Time Analyzer RTA In Microprocessor Buttons Display Out/Thru MIDI Noise Source...
Page 41: Specifications
Height: 1.75 inches (4.4 cm) Depth: 11.625 inches (29.5 cm) Weight Net: 8.2 pounds (3.67 kg) Shipping: 10 pounds (4.48 kg) Due to our efforts for constant improvements, features and specifications listed herein are subject to change without notice. ® Peavey Electronics Corporation...
Page 42 LIMITED WARRANTY Peavey Electronics Corporation warrants to the original purchaser of this new Architectural Acoustics product that it is free from defects in material and workmanship. If within one (1) year from date of purchase a properly installed product proves to be defective and Peavey is notified, Peavey will repair or replace it at no charge. (Note: Batteries and patch cords not covered.) “Original purchaser”...
Page 43 To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all persons exposed to equipment capable of producing high sound pressure levels such as this amplification system be protected by hearing protectors while this unit is in operation. SAVE THESE INSTRUCTIONS! Peavey Electronics Corporation...
Page 44 ® ARCHITECTURAL ACOUSTICS® Features and specifications subject to change without notice. A Division of Peavey Electronics Corporation ® 711 A Street / Meridian, MS 39301 / U.S.A. / (601) 483-5376 / Fax (601) 486-1154 ©1996 #80300382 Printed in U.S.A. 6/96 ™...