Peavey 2462 User's Manual
Contents
1. Z Z Z Z g CIRCUIT DESCRIPTION Two separate inputs are provided on the Digital Effects Processor An instrument level input nominally 250 mVolts or 12 dBv is provided on the front panel and a line level input nominally 2 0 Volts or 6 dBv is provided on the rear panel Both inputs are passed through an input gain stage in preparation for processing If the front panel low level input jack is used the rear panel line level input jack is disconnected After the initial gain stage the input signal is pre conditioned using a pre emphasis circuit to provide better Signal to Noise characteristics for effects operation The INPUT LEVEL control sets the level for the input signal for optimal signal to noise and ultimately the maximum output level for the processor The INPUT LEVEL contro should be set so that the green ACTIVE indicator is lit and the red OVERLOAD indicator only flashes occasionally Continued operation with an OVERLOAD condition could cause distortion and a noticable deterioration in sound quality It should be pointed out that the ACTIVE and OVERLOAD indicators are located after the feedback signal is mixed in giving an excellent indication of any potential overload condition The INPUT LEVEL control also ultimately sets the maximum output signal level If the green ACTIVE indicat2. Controls the phase of the feedback signal used for regeneration Controls the resonance or cancellation frequencies for the ilanging effects 10 Feedback Filter Low pass filter for filtering the feedback signal at 5 KHz to eliminate the build up of noise at increased feedback levels Feedback signal is automatically filtered unless the Filter button is depressed MODULATION SECTION 11 VCO Enable Engages the Low Frequency Oscillator LFO for modulating the delay length or output frequency 12 LFO Speed Controls the frequency of the LFO modulation from 0 1 Hz to 10 Hz 13 LFO Depth Controls the VCO modulation depth or the maximum and minimum delay length Maximum achievable range varies with the selected range but can be as high as 20 to 1 OUTPUT SECTION 14 Output Dry Level Provides the control of the level of the output dry level available at the Low Level Outputs and the Line Level Outputs simultaneously The dry level is automatically mixed with the in phase and out of phase delayed signal 15 Output Delay Level Provides the control of the level of the output delayed signal levels Both the in phase and the out of phase delayed signal are controlled simultaneously Both phases are automatically mixed wtih the dry signal and are available at the Low Level Outputs and the Line Level Outputs IB Bypass Allows the bypass of the Digital Effects Processor regardless of any settings Footswitch control option 17 Stereo Chor
3. WHEN OPERATING THIS AMPLIFICATION SYSTEM IN CRDERTO PREVENT A PERMANENT HEARING LOSS F EXPOSURE IS IN EXCESS CF THE ANTS AG SEI FORTH ABOVE TO INSURE AGAINST POTENTIALLY DANGEROUS EXPOSURE TO HIGH SOUND PRESSURE LEVELS IT S RECOMMENDED THAT ALL PERSONSEXPOSED 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 CAUTION THIS MIXINGCONSOLELPREAMPIEFFECTS DEVICE HAS BEEN DESIGNED ND CONSTRUCTED TO PROVIDE ADEQUATE SIGNAL VOLTAGE FOR PLAYING MODERN MUSIC IMPROPER USE OF THE GAIN EOUALIZATIONCONTROLS UR IMEROPER USE OF INTEPNAL EXTEANAL BUSSES MAY CREATE CLIPPING SCUARE WAVES AND POSSIBLY CAUSE SUBSEDUENT DAMAGE TO THE LOUDSPEAKER SYSTEMS EXTENDED OPERATION OF THE AN EQUALIZATION CONTROLS IN THER MAXIMUM POSITIONS IS THEREFORE NOT RECOMMENDED PLEASE BE AWARE THAT MAXIMUM POWER CAN BE OBT AINED WITH VERY LOW SETTINGS OF THE GAN EQURLIZATION CONTROLS iF THE INPUT SIGNAL VERY STRONG ITIS COMMON PRACTICE AMONG USERS OF SOUND REINFORCEMENT EQUIPMENT TO IDENTIFY THE INDIVIDUAL CHANNELS WITH STRIP CF TAPE PLACED ABOVE OR BELOW THE ROW VOLUME FADERS MANY OF BRANDS OF TAPE HAVE A VERY STRONG ADHESIVE WHICH CAN INHIBIT THE PAINT N THE FACEPLATE AND ACTUALLY REMOVE THE PAINT WHEN THE TAPEIS REMOVED WE STRONGLY RECOMMEND THAT SCOTCH TAPE NOT BE USED ON PAINTED SURFACES NOR ANY OTHER TAPE THAT S NOT ESPECIALLY DESIGNED FOR SUCH APPLICATIONS
4. reconstruction and glitch removal The processed analog signal is then sent to the output mix circuitry both its in phase and out of phase form so thatit be mixed with the dry input signal and also sent back to the input circuitry as a feedback signal The output signals are available at the front panellow level Stereo Chorus outputs as both in phase mixed and out of phase mixed signals and at the rear panel line level Stereo Chorus outputs Both phases of the delayed signal are also available as feedback signals to either accentuate or diminish certain portions of the audio spectrum The level of the feedback signal is controllable using the Feedback Level Control A 5 KHz low pass filter is available in the eedback loop to allow the reduction of high frequency noise build up in prolonged feedback The output signals are separately de emphasized prior to the output stage in order to restore them to their original levels after processing Two remote controls are available on the rear panel as wellas manual functions on the front panel These controls consist of the BYPASS and HOLD controls The BYPASS control allows the unit to be bypassed entirely the only active control being the INPUT LEVEL control The HOLD control allows for the infinite repetition of all the signal data in the memory without any degradation The footswitch control connects the tip to the barrel of the phone plug to activate the remote functions The DELAY SELECT and DEL
5. AY ADJUST controls are utilized to select the range of the delay desired and the exact value of the delay or effect The number beside each LED indicator for the DELAY indicates the maximum amount of delay for thatrange in milliseconds mSec The DELAY ADJUST varies the amount of delay within that range from approximately 0 1 to 1 0 times that range setting Thus 10 to 1 range is available for each range setting allowing for more sensitivity in delay adjustment than previously available in competitive units With the additional use of the VCO this range can be extended even further The VCO controls are also available as front panel manual controls The Digital Effects Processor utilizes a unique approach to LFO modulation of the delay length and output frequency The Relative Time Monitor is utilized to assure optimum performance without degrading the processor bandwidth and at the same time extending the effects range to approximately 20 to 1 The VCO controls consist of the VCO SPEED which varies the LFO modulator frequency from 0 1 Hz to 10 0 Hz and the VCO DEPTH which varies the distance through the memory thatis traversed by the VCO modulation By adjusting the VCO DEPTH and the DELAY ADJUST controls sweeps of the signal spectrum of upto 20 to 1 can be easily accomplished The VCO modulation may be easily enabled or disabled by using the ENABLE pushbuttom on the front panel TYPICAL EFECTS DESCRIPTIONS SHADED REGIONS INDICATE AREAS OF ACTIVATIO
6. DIGITAL EFFECTS PROCESSOR model 191111 1 5 7 8 12 13 14 15 17 18 19 DESCRIPTION FRONT PANEL CY INPUT SECTION 1 Low Level Input Musical instrument input jack set for a nominal input level of 250 millivolts 12 dBv 2 Input Level Control Gain control for the input section of the Digital Effects Processor Used to maximize the signal to noise ratio of the unit Should be adjusted so the Overload indicator just begins to light 8 Active Indicator Indicates that the processor input level is sufficient for adequate operation 4 Overload Indicator Indicates that the processor has only 12 dB of headroom available Continuous illumination of the red LED indicates that the unit is being overdriven and distortion could result DELAY SECTION 5 Range Indicators Indicates the range of operation of the delay memory The number beside the LED indicates the maximum achievable delay with that particular setting The LFO may be enabled in any range desired 6 Range Select Pushbutton selection of the desired delay memory range Upper button increments the delay range Lower button decrements the delay range 7 Delay Adjust Varies the amount of delay from 0 1 10 to 1 0 100 of the selected delay range Also varies the maximum amount of modulation achievable on a particular range REGENERATION SECTION 8 Feedback Level Controls the amount cf feedback signal and thus the amount of regeneration accomplished 9 Feedback Phase
7. DIGITAL EFFECTS PROCESSOR _ ZZ MODEL 1310 OPERATOR S GUIDE o0 CAUTION TO PREVENT ELECTRICAL SHOCK OR FIRE HAZARD DO NOT EXPOSE THIS INSTRUMENT TO RAIN OR MOISTURE BEFORE USING THIS INSTRUMENT READ BACK COVER FOR FURTHER WARNINGS CLASS COMPUTING DEVICE INFORMATION TO USER This equipment generates and uses radio frequency energy and if not installed and used properly that is inaccordance with the manufacturer s instructions may cause interference to radio and television reception It has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules which are designed to provide reasonable protection against such interference in a residential installation However there is no guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures reorient the receiving antenna relocate the equipment with respect to the receiver move the equipment away from the receiver plug the equipment into a different outlet so that the equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional sugge
8. MEDIUM OR LIGHT ADHESIVE MASKING OR MIXER LABEL TAPE Is RECOMMENDED IFTAPEISUISED ANY LEFT CN PAINTED SURFACE FOR EXTENDED PERIODS WiLL BE DIFFICULT TO REMOVE NEVER USE CLEAR OR SCOTCH TAPE FOR THESE APPLICATIONS 4 ead al safety and operating iasteuctions before using thie amp Com ct only to a power supply ofthe type marked on the unit 1 Care should betakenso that ob ects do nota and liquids are no product adjacent to the power supply cord Spilled ino the unit through the ventilation holes or any other 2 All satety and operating insituctons shovle be retained for 9 Never break off the ground pm on the power supply Fn openings future reference grounding write tor wur Shock 14 Ths unl shoud bechected a auld serie enin I 3 Obey alltautons i he eperavng istrucionsang on tne vackot and Grounding A The power sucoly cord o slug has been damaged tne unit 10 Power supply cords should always be handle carelully Never 8 Anything has fallen or been spilled nto the unt All operating instructions sticuld be followed Tris product should not be used near water a bathtub sink swing pool wet basement ec Ths product should be ocated so tha ie position does not interfere wilh its proper ventfatin It should not be flat hoist 2 wall or slaced in enclosure that will ihe low of cooking Tis produet shoul not be placed near asource of ea
9. N COMB FILTERING ON OR OFF CHORUSING 1 DIGITAL sep eFrEOTS I pai e Frey model 1910110 FLANGING ON OR OFF DIGITAL EFFECTS Bax c i HU E FFECTS model 19111 REGENERATION r oureur SLAPBACK ECHO DIGITAL EFFECTS PROCESSOR NEJ model TAT ll vis a DELAYED VIBRATO REGENERATON oureur 277 a ACNE VERDAD FEGENERATION Ld veo Am H1 ey s LI eec LONG DELAY MULTIPLE REPEATS AEGEWERATION outeur eects WORT m DIGITAL EFFECTS PROCESSOR model 1810 es p DIGITAL EFFECTS PROCESSOR model 1810 DIGITAL EFFECTS PROCESSOR DANGER EXPOSURE TO EXTREMELY HIGH NOISE LEVELS MAY CAUSE A PERMANENT HEARING LOSS INDIVIDUALS VARY CONSICERABLY INSUSCEPTIBILITY TO NOISE INDUCED HEARING LOSS BUT NEARLY EVERYONE WILL LOSESOME HEARING IF EXPOSED TO SUFFICIENTLY INTENSE NOISE FOR A SUFFICIENT TIME THE U S GOVERNMENTS OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION OSHA HAS SPECIFIED THE FOLLOWING PERMISSIBLE NOISE LEVEL EXPOSURES DURATION PER DAY IN HOURS wor kss SOUNO LEVEL dBA SLOW RESPONSE 9 2 9 10 12 15 e s ACCORDING TO USHA ANY EXPOSURE IN EXCESS OF THE ABOVE PERMISSIBLE LIMITS COULD RESULT IN SOME HEARING LOSS EAR PLUGS CR PROTECTORS IN THE EAR CANALS OT OVER THE EARS MUST BE WORN
10. f the LFO modulation of the internal VCO ANTI ALIASING FILTER LFO Depth Range Up to 20 1 20 KHz 6 Pole Chebyshev Low Pass Filter LFO Frequency 0 1 Hz to 10 Hz 36 dB Octave minimum roll off HOLD remote only SIGNAL TO NOISE Replays signal in memory indefinitely without degradation 70 dB minimum delay REGENERATION 100 dB minimum dry Allows feedback of delayed signal for multiple echos or for effects DYNAMIC RANGE Filter 5 KHz Low Pass Filter 100 dB minimum delay FOOTSWTICH 100 dB minimum dry Bypass Hold FEATURES Continuously variable delay time from 0 1 milliseconds to 1310 milliseconds 1 31 seconds with 9 operating ranges Full 20 Hz to 20 kHz bandwidth at all delay settings and with any special effects active Unique LFO modulation technique utilizing a hybrid Relative Time Monitor RTM system with time frequency equalization Easily controlled LFO with continuously variable frequency and depth for modulation of effects Wide range of special effects including Flanging Chorusing Doubling Slapback Echo Vibrato Long Delay Optional hold footswitch control for infinite repeat without signal degradation Low Level and Line Level inputs and outputs for ease of use in a multitude of operational environments Phase control of feedback and delay output signals Feedback filter for low pass regeneration Stereo chorus outputs with dry delay output level controls Bypass switch with optional footswitch control 3 2 4 6 9 10 1 16
11. obtained without sacrificing either audio Signal to Noise ratio dynamic range or bandwidth The feature that allows this Digital Effects Processor to provide the extended bandwidth without aliasing and still provide the effects offered by lower performance units is a unique hybrid Relative Time Monitor RTM system utilizing state of the art Time Frequency Equalization techniques The RTM allows for modification of the delay length and frequency modulation without altering the necessary sampling rate required for full bandwidth operation This special signal processing implementation provides the ultimate in digital effects at an affordable price without sacrificing performance TABLE OF CONTENTS 1 INTRODUCTION 1 Il SPECIFICATIONS 2 11 FEATURES 2 IV FRONT PANEL DESCRIPTION _ 3 V REAR PANEL DESCRIPTION 3 VI CIRCUIT BLOCK DIAGRAM AND DESCRIPTION 4 VIL TYPICAL EFFECTS DESCRIPTIONS 5 amp 6 SPECIFICATIONS DELAY RANGE INPUTS 0 1 to 1310 milliseconds Low Level 0 25 Vrms 12 dBV Front Panel DELAY ADJUST Line Level 2 0 Vrms 6 dBV Rear Panel 0 1 10 to 1 0 100 of range OUTPUTS FREQUENCY RESPONSE Low Level Stereo 0 25 Vrms 12 dBV Front Panel 20 Hz to 20KHz all settings Line Level Stereo 2 0 Vrms 6 dBV Rear Panel 1 0 dB HEADROOM QUANTIZATION Active 12 dB reserve 12 Bits A D amp D A Conversion Overload 6 dB reserve SAMPLE RATE VCO MODULATION 50 KHz A D Conversion Rate Complete control o
12. or is lit and the red OVERLOAD indicator flashes occasionally the maximum output level will nominally be 250 mV 12 dBv at the front panel output jacks and 2 0 V 6 dBv at the rear panel output jacks To minimize any anomolies due to aliasing Analog to Digital conversion is preceded by a 20 KHz 6 pole 36 dB octave Chebyshev Low Pass Filter constructed with precision components to assure flat response and minimum in band ripple The analog to digital conversion provides 12 bit digital representation of the analog signal at a 50 KHz sample rate once again to minimize aliasing effects The A D converter components were selected to assure the proper linearity and conversion accuracy for the 72 dB signal to noise ratio attainable with a 12 bit system The digitized signal is then stored in the memory which is constructed with the 64K dynamic RAM providing the 1 31 seconds of possible delay The control of the memory is derived from a unique Relative Time Monitoring system an approach which enables the capability to obtain extended effects extended control increased bandwidth and increased system performance over units costing far The Digital to Analog conversion is provided utilizing state of the art CMOS D A circuitry and corrective equalization to assure no reduction in frequency response due to sampling SIN X X windowing The Digital to Analog conversion is followed by 20 KHz 6 pole 36 dB Octave Chebyshev Low Pass Filter for signa
13. stions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the US Government Printing Office Washington DC 20402 Stock No 004 000 00345 4 INTRODUCTION The Peavey Digital Effects Processor utilizes the most advanced technologies available to provide high performance digital audio processing in a unique and affordable package Its quality and capabilities are sufficient for both the performing musician and the recording artist The Digital Effects Processor model 1310 provides continuously adjustable delay settings from Q 1 milliseconds to 1310 milliseconds 1 31 seconds with absolutely no change in signal quality A full audio bandwidth 20 Hz to 20 KHz is available at all settings and with any of the effects enabled This allows for utilization not only with musical instrument signal inputs but also studio quality signal inputs By utilizing the extended range of delay settings a wide range of digital effects including flanging doubling chorusing and slap back echo can be obtained through the front panel controls The front panel controls allow for the addition of LFO modulation of the delay length feedback or regeneration of the delayed signal LFO modulation of the output signal frequency and total amplitude and phase control of both feedback and delayed signals Any of these digital effects can be
14. t sue asa Teater radiator or anotner teal producing smplier lk or place equipment on power supply ceras Pariosically Check coras for cuts or sgns of stress especialy atthe plug and Th poine where the cort exits the umit The power supply cord should be unplugged when the unl is to be unages lor long periods of tise Metal parts can be cleaned wih a camp rag The vinyl covering Used on some unis Can e cleaned wih damp rag Or a mania based household cleaner if necessary 6 The uni does not operate corre The unn nas been dropped or ne enclosure damaged Tne user should not attempt to servie thiseauicment All service work should te core by qualited service technician Due to our efforts for constant improvement features and specifications are subject to change without notice PEAVEY ELECTRONICS CORP 711 A STREET MERIDIAN MS 39301 TELEPHONE 601 483 5365 TELEX 504115 PRINTED IN USA 6 80300081
15. us Low Level Output Provides simultaneous outputs for both in phase and out of phase delayed signal mixed with the original dry signal Mix is controlled with the output level controls 18 Power Switch Used to turn on the unit Energizes the A C power for both the 15 volt supply and the 5 volt supply 19 Power On Indicator Indicates that the power has been applied to the unit Power should be turned off before plugging in the unit or removing the plug from the A C source REAR PANEL OUTPUT SECTION A A C Line Cable Used to supply 120 volt 60 Hz A C power to the unit domestic units Should be plugged into any standard 120 volt wall outlet or equivalent B Stereo Chorus Line Level Output Line level output jack to provide signal levels of 2 0 Vrms 6dBV as an output Can be used in conjunction with the front panel jacks FOOTSWITCH SECTION C Bypass Switch Remote control of the Bypass function D Hold Switch Remote control of the infinite Hold function NOTE Hold function only works on upper 5 Range Selections INPUT SECTION E Lina Level Input Line level input jack to accommodate a 2 0 Vrms 6 dBv level signal input When used the front panel jack should not be used LINE DUTFUT FOOT SWITCH LINE INPUT pm Es a CLASS B SANT TD SUBPART 1 D ann Mam 6 dN 20 vas DIGITAL EFFECTS PROCESSOR BLOCK DIAGRAM n i CA
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