422 Stereo AGC/Leveler
Contents
1. Ti Ring Sleeve Tip Sleeve Sleeve j Unbalanced q E IN Tip Tip 422 Output Balanced Lez Balanced Lez Ring Sleeve Sleeve Balanced Ps Tip Ring Sleeve Sleeve Sleeve Unbalanced Male XLR Pin 1 ground Pin 2 high Pin 3 low Male XLR Pin 1 ground Pin 2 high Pin 3 low Male 1 4 tip ring sleeve plug Tip high Ring low Sleeve ground Male 1 4 tip sleeve plug Tip high Sleeve ground Destination device input Male XLR Pin 1 ground Pin 2 high Pin 3 low Male 1 4 tip ring sleeve plug Tip high Ring low Sleeve ground Male 1 4 tip ring sleeve plug Tip high Ring low Sleeve ground Male 1 4 tip sleeve plug Tip high Sleeve ground Chapter 5 Operation The TARGET LEVEL control When setting up the 422 this is generally the control that you should adjust first The TARGET LEVEL control does just what the name implies It establishes the volume where you want it Technically the control sets a threshold Incoming signals that exceed this threshold are com pressed downward towards the threshold Incoming signals below the threshold are expanded leveled upward towards the threshold The 422 s outpu2. O Symetrix Operator Safety Summary Equipment Markings CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN TO REDUCE THE RISK OF FIRE OR WARNING ELECTRIC SHOCK Do NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE AVI a RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR SEE OWNERS MANUAL VOIR CAHIER D INSTRUCTIONS No user serviceable parts inside Refer servicing to qualified service personnel ll ne se trouve a l interieur aucune piece pourvant entre repar e l usager S adresser a un reparateur comp tent The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user of 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 The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance servicing instructions in the literature accompanying the product i e this manual Caution To prevent electric shock do not use the polarized plug supplied with the unit with any extension cord receptacle or other outlet unless the blades can be fully inserted Terms Several notational conventions are used in this manual Some paragraphs may use Note Caution or Warning as a heading Certain typefaces and capitalization are used to identify certain words These are Note Identifies information tha
3. that the Product will be free from defects in material and workmanship as a result of normal commer cial use for one 1 year from the date of purchase This warranty will be automatically extended subject to the additional limitations set forth below for an additional four years if the Warranty Registration is completed and returned to Symetrix or completed online within thirty 30 days of the date of delivery Symetrix s warranty obligation is limited to the repair replacement or refund at Symetrix s sole discretion of the part or parts of the Product which may thus prove defective in materials or workmanship within one year from date of purchase or five years from the date of purchase if Buyer has registered its purchase as provided above under normal use and which our examination discloses to our satisfaction to be thus defective provided that Buyer gives Symetrix prompt notice of its warranty claim and satisfactory proof thereof Symetrix will make every reasonable effort to ensure that parts are available to support the repair of our products under warranty In the event that a product or component part thereof becomes obsolete unavailable or irreparable Symetrix reserves the right to refund a prorated portion of the purchase price in full satisfaction of all warranty claims A refund of the purchase price is prorated as follows 100 through year one 80 through year two 60 through year three 40 through year four a
4. 19 1 cm and a height of 1 75 4 45 cm Allow at least 4 10 16 cm behind the unit for the protrusion of connectors We recommend you take care not to mount the 422 next to devices that emit large electromagnetic fields such as audio power amplifiers To do so may compromise the noise performance of the 422 The 422 has been designed to conform to mechani cal guidelines as described in EIA Standard RS 310 C and IEC Recommendation 297 Recommended audio cable wiring For optimum system performance we recommend that the 422 be connected to balanced signal sources If this is not practical in your situation then you may connect to unbalanced sources The diagram on the next page illustrates recommended cable wiring practices gt Symetrix Source device output Female XLR Pin 1 ground Pin 2 high Pin 3 low Male 1 4 tip ring sleeve plug Tip high Ring low Sleeve ground Male 1 4 tip ring sleeve plug Tip high Ring low Sleeve ground Male 1 4 tip sleeve plug Tip high Sleeve ground Female XLR Pin 1 ground Pin 2 high Pin 3 low Female XLR Pin 1 ground Pin 2 high Pin 3 low Male 1 4 tip ring sleeve plug Tip high Ring low Sleeve ground Male 1 4 tip sleeve plug Tip high Sleeve ground Symetrix lt 422 Input Balanced Balanced Tip Ring Sleeve ip Sleeve Balanced a Fa
5. FITNESS FOR USE AND OF ALL OTHER OBLIGATIONS OR LIABILITIES ON OUR PART AND WE NEITHER ASSUME NOR AUTHORIZE ANY OTHER PERSON TO ASSUME FOR US ANY OTHER LIABILITY IN CONNECTION WITH THE SALE OF THE PRODUCT THIS WARRANTY SHALL NOT APPLY TO THIS PRODUCT OR ANY PART THERE OF WHICH HAS BEEN SUBJECT TO ACCIDENT NEGLIGENCE ALTERATION ABUSE OR MISUSE WE MAKE NO WARRANTY WHATSO EVER IN RESPECT TO ACCESSORIES OR PARTS NOT SUPPLIED BY US THE TERM ORIGINAL PURCHASER AS USED IN THIS WARRANTY SHALL BE DEEMED TO MEAN THAT PERSON OR COMPANY THAT ORIGINALLY PURCHASED THE PRODUCT This Symetrix product has been designed and manufactured for use in professional and studio audio systems and is not intended for other usage This warranty only applies to Buyers using the Product in professional and studio audio systems With respect to others including but not limited to consumers for personal family or household use Symetrix expressly disclaims all warranties including but not limited to warranties of merchantability and fitness for a particular purpose and the express warranties as otherwise provided herein Symetrix reserves the right to modify the design or make additions to or improvements to its product lines without making similar upgrades to Product purchased by Buyer Symetrix does not authorize any third party including any dealer or sales representative to assume any liability effect any repairs or modifications to the Prod
6. PEAK LIMIT SYSTEM THRESHOLD VU O ON 0000000000 OINPUTLEVEL BYPASS 48 42 36 30 24 18 12 6 OVU 6 12 x n n r ae Bass UMT 42 36 30 24 48 42 OVU 6 12 CLIP Symetrix 6 45 BYPASS QO oUTPUT LEVEL Peak Limit control Determines the level at which peak limiting gain reduction begins Signals exceeding this threshold will be reduced by a ratio of approximately 15 1 an increase of 15 dB at the input results in only 1 dB increase at the output Byrass In button Activates relays which route the 422 input signals directly from the input connectors to the output connectors when in the Bypass position Input Output LEDs Indicate the higher of either left or right channel calibrated in VU volume units 0 VU 4 dBu O Symetrix O Symetrix Rear panel view left D 422 STEREO AGC LEVELER C REMOTE LEFT LEFT oN AC INPUT 7 N BYPASS OUTPUTS INPUTS 15 WATTS POWER MAX C IS UNIT IS THIS U etrix MANUFACTURED IN LYNNWOOD WA U S A AC INPUT connector Accepts nominal AC power sources of 117 volts or 230 volts REMOTE Bypass connector Provides for the control of the Bypass IN function via a remote contact closure Lert INPUT connectors Electronically balanced bridging line level inputs XLR pin 1 is ground pin 2 is high and pin 3 is low The 1 4 connector s sleeve is ground ring is low and tip is high LEFT Output connectors
7. a plastic bag and surround it with bubble wrap 3 Pack the box full of Styrofoam peanuts Be sure there is enough clearance in the carton to protect the rack ears We will return the unit in Symetrix packaging Appendix A Remote Bypass Wiring For those installations that may require remote bypassing of the 422 s functions a rear panel jack has been provided to accept an external switch for this purpose The external switch should be a high quality industrial grade single pole double throw toggle switch We highly recommend that shielded wire be used to connect the switch to the 422 so as to minimize the possibility of introduc ing any radio frequency interference into the 422 The external 1 4 audio plug should be of the tip sleeve type often referred to as a mono plug The following diagram illustrates recom mended wiring practice User supplied remote bypass circuitry The cable should be wired as shown above and as described below 1 The tip of the 1 4 plug is soldered to one end of the signal wire of a coaxial cable 2 One end of the shield of the coaxial cable is soldered to the sleeve of the 1 4 plug 3 The other end of the signal wire is soldered to the common terminal of a single pole double throw switch 4 The remaining shield is soldered to either of the remaining terminals of the switch one terminal remains unconnected 3 Symetrix O Symetrix Declaration of Conformity Appe
8. the Symetrix factory If this does not correspond to the voltage setting for your locale then do not attempt to apply power to the 422 Instead return the unit to your local Symetrix distributor for modification The 422 is shipped from the Symetrix factory with a detachable AC power cable IEC standard included Depending on the intended destination the power plug is either the US type intended for 117 VAC use or the Europlug type If the power cable s plug is not right for your locale then please contact your local Symetrix distributor for the proper cable Once you have determined that the 422 s operating voltage matches that of your locale and you are ready to begin follow these steps 1 Plug the socket end of the power cable into the recessed AC power receptacle on the back of the 422 2 Plug the other end of the power cable into a three hole grounded outlet or power strip Warning The 422 is intended to be electrically grounded It has been provided with a three wire grounding plug a plug that has a third grounding pin This plug will fit only a grounded AC outlet This is a safety feature If you are unable to insert the plug into the outlet contact a licensed electrician to replace the outlet with a properly grounded outlet Do not defeat the purpose of the grounding plug Mounting in an equipment rack The 422 occupies one rack space 1U in a standard equipment rack with a width of 19 48 3 cm a depth of 7 5
9. 422 Stereo AGC Leveler User s Guide O Symetrix O Symetrix Table of Contents Chapter 1 Introduction Chapter 2 Operator Safety Summary Chapter 3 Front amp Rear Panel Overview Chapter 4 Installation Chapter 5 Operation Chapter 6 Specifications Chapter 7 Troubleshooting Chapter 8 Warranty amp Service Appendix 4 Remote Bypass Wiring Appendix B Declaration of Conformity 422 Stereo AGC Leveler User s Guide August 2000 Symetrix Inc All rights reserved Printed in the United States of America Symetrix Part Number 53422 0A02 The information in this guide is subject to change without notice Symetrix Inc shall not be liable for technical or editorial errors or omissions contained herein nor is it liable for incidental or consequential damages resulting from the furnishing performance or use of this material Mention of third party products is for informa tional purposes only and constitutes neither an endorsement nor a recommendation Symetrix assumes no responsibility with regard to the performance or use of these products Under copyright laws no part of this user guide may be reproduced or transmitted in any form or by any means electronic or mechanical without permission in writing from Symetrix Inc If however your only means of access is electronic permission to print one copy is hereby granted Permission to copy the Architects and Engineers Specificiations for written proposals specifyin
10. Electronically balanced low impedance line level outputs XLR pin 1 is ground pin 2 is high and pin 3 is low The 1 4 connector s sleeve is ground ring is low and tip is high Rear panel view right RIGHT RIGHT TYPICAL CONNECTIONS OUTPUTS INPUTS PIN 1 SLEEVE GROUND PIN 2 TIP HIGH PIN 3 RING LOW Input and Output connections may be Balanced or Unbalanced XLR Pin 2 is HIGH D Ricut INPUT connectors Electronically balanced bridging line level inputs XLR pin 1 is ground pin 2 is high and pin 3 is low The 1 4 connector s sleeve is ground ring is low and tip is high Ricut OUTPUT connectors Electronically balanced low impedance line level outputs XLR pin 1 is ground pin 2 is high and pin 3 is low The 1 4 connector s sleeve is ground ring is low and tip is high Note For optimum immunity to noise and radio frequency interference we highly recommend connecting the 422 to balanced equipment where possible If this is not possible unbalanced connections are OK Unbalanced connections via tip sleeve mono 1 4 plugs are easy to make via the 422 s 1 4 input and output connectors 4 Chapter 4 Installation Before you plug the 422 into a wall socket carefully read the information in the following chapter AC Line connection in countries outside of the European Community A sticker on the right end of the unit indicates the nominal voltage setting for the unit as it left
11. ace the unit in BYPASS mode to determine that you are feeding it a clean signal Buzz in the output Check input and output connector wiring Check for ground loops between interconnected system equipment Are all system components on the same AC ground Check input signal levels and input level control settings The input may be too low in level If so boost the signal from your console or input source Is the input signal already noisy Disconnect the inputs from the 422 and listen for noise at the output If the noise is gone then the problem is prior to the 422 Consult a qualified service technician or the Symetrix factory Chapter 8 Important Information Regarding Your Warranty We would like to offer you an incentive to complete our product registration form Either fully complete and mail your product registration card or register online at www symetrixaudio com You will then have a total of 5 years of warranty coverage under the terms and limitations as set forth below without additional cost If you don t register your product you will still receive one year of warranty coverage but it only takes a minute to fill out the card or register online and we won t share your personal information with others Following are the terms and limitations of the Symetrix warranty Warranty Symetrix Inc expressly warrants to the original purchaser Buyer subject to the terms and conditions set forth below
12. ated counterclockwise the threshold is moved lower and the resultant limiting can be observed as a reduction in overall output level on the Output LED meter The optimum setting for the PEAK Limit control is most often correlated directly to requirements of downstream system components If you re unsure of where to set the control then you may want to try this observe the Output level display and note the average output level then adjust the PEAK Limir control 10 12 dB above the average output level Set this way the peak limiter will provide protection without over limiting the signal The Limir LED should only come on occasionally If it stays on constantly then your are applying too much limiting and should turn the Peak Limit control O Symetrix O Symetrix clockwise to reduce the amount of limiting If you do not have a clearly identified need to peak limit your signal then we recommend that you turn the Peak Limit control to the fully clockwise Bypass position The System Byrass IN button The Bypass IN button places the 422 in either Bypass or IN CIRCUIT modes In Bypass mode the incoming signals are directly routed via relays to the 422 s outputs thereby bypassing any internal circuitry In Bypass mode the front panel rotary controls have no effect on the operation of the 422 A red LED indicates Bypass status while a green LED indicates IN status The INPUT AND OUTPUT level meters The Input and Ourpur level meters a
13. d the highest professional audio industry standards in terms of headroom low noise and distortion and superb sonic qualities The 422 s logical control panel holds no hidden surprises The product is easy to learn and simple to use In the sections that follow you ll find information on installation operation and specific applications of the 422 We recommend that you read this manual from cover to cover Somewhere between the confines of the two covers you should find the answers to most of your questions If not please feel free to contact our Technical Services Group in the following ways T US customers 888 349 3222 International customers 425 787 3222 from 6 00 am to 4 30 pm Pacific Time Monday through Friday F 425 787 3211 tech symetrixaudio com www symetrixaudio com sus amo Tee ru a O THRESHOLD WU INPUT OUTPUT output LEVEL HRESHOLD YU PO 2 9999990000 Omen O 422 om vast 1 i NE then O OD S E K 5 ur senna sua EE as me Pen coeur rome mas 8 6 0 0 0 0 0 0 0 0 Soma men O e D Front panel 422 STEREO AGC LEVELER ee TYPICAL CONNECTIONS PIN 1 SLEEVE GROUND PIN2 TIP HIGH PINS RING LOW REMOTE hae 7 N C BYPASS 15WATIS POWER i O THIS UNIT IS 7 o etrix MANUFACTURED IN LYNNWOOD WA USA Rear panel O7 Oo Input and Output connections may be Balanced or Unbalanced xLRPin2is HIGH
14. en proceed as follows In Warranty Repairs Repairs made in warranty will cost you only one way freight charges We ll prepay the return surface freight Of course if the repair is due to operator error parts and labor will be charged If there are charges for the repair costs you will pay for the return freight All charges will be COD unless you have made other arrangements prepaid Visa or Mastercard Out of Warranty Repairs If the warranty period has passed you ll be billed for all necessary parts labor packaging materials and freight charges To Get Your 422 Unit Repaired USA Customers Only 1 Call our Technical Services Group for a return authorization RA number 888 349 3222 Monday through Friday 6 00 am to 4 30 pm Pacific Time Have your serial number ready to give to the service representative Pack the unit in its original packaging materials Include your name address daytime telephone number and a brief statement of the problem Write the RA number on the outside of the box nan BR N Ship the unit to Symetrix freight prepaid We do not accept freight collect shipments Symetrix Inc 14926 35th Ave West Lynnwood WA 98037 If You Don t Have Factory Packaging Materials If you send us your product in substandard packaging we will charge you for factory shipping materials If you don t have the factory packaging materials do the following 1 Select an oversized carton 2 Wrap the unit in
15. ers Specifications The Automatic Gain Controller AGC Leveler shall be a stereo model that reduces the dynamic range of wide range wideband audio signals and provides peak limiting The AGC shall occupy one rack space 1U The AGC Leveler shall be capable of controlling audio signals ranging from 70 dBu to 24 dBu and reducing their range by an input output ratio of from 1 1 to 5 1 A target output level control shall be provided to shift the level of the output signal over a nominal 20 dB range The release time of the AGC shall be controlled by the presence and nature of input signals The AGC Leveler shall also contain an integral peak limiter having at least a 15 1 ratio and adjustable threshold level A green LED indicator shall be provided to indicate peak limiter activity The peak limiter threshold shall determine the absolute maximum output amplitude of the AGC Leveler regardless of other conditions The AGC Leveler shall provide identical peak responding input and output level meters These meters shall be capable of responding to signals ranging from 48 VU to 12 VU 50 dBu to 16 dBu An output clipping indicator shall be provided The inputs shall be active balanced bridging designs terminated with 3 pin XLR AES IEC standard wiring female and 1 4 tip ring sleeve jacks The outputs shall be active balanced designs terminated with 3 pin XLR AES IEC standard wiring male and 1 4 tip ring sleeve jacks Overall fre
16. ers and panels properly installed Only use accessories specified by the manufacturer Clean only with a damp cloth User serviceable parts There are no user serviceable parts inside the 422 In case of failure refer all servicing to the factory Servic ing is required when the 422 has been damaged in any way such as when a power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Chapter 3 Front amp Rear Panel Overview Front view left side a C DETECTOR RATIO TARGET LEVEL o THRESHOLD Vu INPUT OUTPUT OUTPUT LEVEL 422 aa 4251 LR STEREO AGC LEVELER N N N R E a im 45 20 BYPASS 5 1 DECREASE INCREASE O DETECTOR Establishes an audio reference for the purpose of discriminating between noise and useful audio The 422 will not attempt to apply leveling upward gain increases to signals that fall below the detector threshold Ratio control Sets the amount of downward compression for signals exceeding the target level as well as the amount of upward leveling for signals below the target level TARGET LEVEL control Establishes a nominal gain goal For signals below the target level the 422 adds gain and boosts them upward Signals above the target level are reduced in gain down ward towards the target Front view right o
17. g equipment for sound reinforcement systems is also granted Symetrix Inc 14926 35th Ave West Lynnwood WA 98037 2303 USA Tel 425 787 3222 Fax 425 787 3211 Web www symetrixaudio com Email symetrix symetrixaudio com NY Nn N 10 11 13 14 Chapter 1 Introduction Congratulations on your decision to use a Symetrix model 422 Stereo AGC Leveler The 422 has been designed to give professional audio users unequaled performance ease of use and reliability This manual will guide you through installation and operation of the 422 and provide valuable tips on how to interface with other equipment in your system The 422 is a singular solution for controlling unpredictable stereo or monaural audio levels in a wide variety of audio systems Application environments include broadcast recording tape duplication and installed foreground and background systems just to name a few The 422 excels at subtly and unobtrusively bringing level divergent audio into a target window resulting in greater intelligibility and informational perception Unlike compressor limiters which are effective at reducing sounds that are too loud pushing down from the top only the 422 provides both downward compression and upward leveling by gently adding gain to low level signals until a target level is reached The 422 employs advanced analog signal processing technology executed with high quality industrial grade components to meet or excee
18. leveling At high ratios the program density increase results in a more present or up front sound At low ratios the 422 performs subtle yet effective automatic gain riding At a setting of 5 1 maximum the effect of the 422 AGC leveling process is very audible The optimum setting of this control is usually dictated by the particular type of material one is processing and the desired effect For example if the 422 is part of a foreground background music paging system in a high ambient noise environment a higher ratio will produce maximum intelligibility As part of a broadcast chain where the process itself must be as subtle as possible a 2 5 1 or lower ratio is advisable If you re unsure of where to position the ratio control then we suggest you start in the twelve o clock position and make upward and downward adjustments from there as you listen and evaluate the results The PEAK Limit control The Peak Limit control sets an absolute ceiling threshold level to which the maximum output level is limited The control is calibrated in VU volume units The PEAK LIMITER is useful in any application where it is desired to prevent overload of subsequent system components This may include applications such as high volume music systems in clubs and theatres or transmission line applications such as AM FM radio and television When the control is turned to its full clockwise rotation the PEAK LIMITER is bypassed As the control is rot
19. nd 20 through year five In order to serve you better we request that the Buyer shall prior to shipping Product to Symetrix for warranty service contact Symetrix and secure a Return Authorization Number that shall be included with the returned Product This will facilitate our efforts to keep track of your Product and process your warranty repair as quickly as possible Buyer will prepay all freight charges to ship the Product to Symetrix for warranty inspection and service This warranty is subject to Symetrix s inspection of the Product at its facilities and upon Symetrix s request satisfactory proof of purchase dated copy of original retail dealer s invoice Symetrix reserves the right to effect repairs to the product with reconditioned components parts Products once Warranty amp Service repaired under warranty will be shipped to Buyer freight prepaid by Symetrix via United Parcel Service surface or any similar shipper to any location designated by buyer within the Continental United States At Buyer s request and expense Product will be returned via airfreight Outside the continental United States repaired or replaced products will be returned freight collect THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED ARISING BY LAW OR OTHERWISE INCLUDING WITHOUT LIMITATION ANY OBLIGATIONS OF THE SELLER WITH RESPECT TO CONSEQUENTIAL DAMAGES INCLUDING THE WARRANTIES OF MERCHANTABILITY AND
20. ndix B Declaration of Conformity We Symetrix Incorporated 14926 35th Ave West Lynnwood Washington USA declare under our sole responsibility that the product 422 Stereo AGC Leveler to which this declaration relates is in conformity with the following standards EN 60065 Safety requirements for mains operated electronic and related apparatus for household and similar general use EN 50082 1 Electromagnetic compatibility Generic immunity standard Part 1 Residential commercial and light industry The technical construction file is maintained at Symetrix Inc 14926 35th Ave West Lynnwood WA 98037 2303 USA The authorized representative located within the European Community is World Marketing Associates P O Box 100 St Austell Cornwall PL26 6YU UK Date of issue 18 January 1995 Place of issue Lynnwood Washington USA Authorized signature a Dane Butcher President Symetrix Incorporated 14 O Symetrix O Symetrix Symetrix Symetrix Inc 14926 35th Ave West Lynnwood WA 98037 2303 USA Tel 425 787 3222 Fax 425 787 3211 Web site www symetrixaudio com Email symetrix symetrixaudio com
21. quency response shall be 20 Hz to 20 kHz 1 dB measured at 4 dBv output There shall be no more than 0 02 harmonic distortion measured under the following conditions 4 dBu input 4 dBm output Bypass switch out 1000 Hz test frequency Residual noise output shall be no greater than 90 dBu measured in a 20 kHz noise bandwidth with an rms responding meter When the unit is inoperative either by loss of power or via the Bypass switch the inputs and outputs shall be wired together A REMOTE Bypass facility shall be provided whereby an external contact closure shall force the AGC Leveler into Bypass mode The AGC Leveler shall be capable of operating by means of its own built in power supply con nected to 117V nominal AC 105 to 130V 50 60 Hz and 230V nominal AC 207 to 253 VAC The AGC Leveler shall be a Symetrix Incorporated model 422 Stereo AGC Leveler O Symetrix O Symetrix Troubleshooting SYMPTOM There is no output signal Distortion in the output signal Noise hiss The 422 doesn t power up or doesn t respond properly 10 Chapter 7 PROBABLE CAUSE Check the AC power connections to the 422 Check input and output cables and connections Determine that there really is a signal coming from the source and that it is getting to the 422 Check the input signal Is it overdriving the 422 s input Is the incoming signal already distorted Listen up stream from the 422 or manually pl
22. re calibrated in VU volume units The meters read the greater of either left or right channel signal levels The meters give an indication of absolute signal levels and show the exact relationship between input and output signals as a result of various settings of the 422 s controls 8 Chapter 6 422 Specifications Input Output Inputs Stereo Balanced Bridging or Unbalanced Outputs Stereo Balanced or Unbalanced Input Connectors TRS XLR and RCA Output Connectors TRS XLR and RCA Polarity Input tip is high ring is low sleeve is ground Output tip is high ring is low sleeve is ground Maximum Input Level 24 dBu Maximum Output Level 22 dBu into 600 Ohms Performance Data Specifications Physical Size hwd 1 72 x 19 x 5 5 inches 4 37 x 48 26 x 13 97 centimeters Shipping Weight 8 Ibs 3 63kg Electrical Power Requirements 117V nominal 105 to 130V AC 50 to 60 Hz 12 watts 230V nominal 207 to 255V AC 50 Hz 12 watts Note The maximum operating ambient temperature is 25 degrees C Frequency Response 0 dB 1 dB 20 Hz 20 kHz THD Noise 05 O dBu in 10 dB gain reduction 1 kHz Dynamic Range gt 110 dB Crosstalk 60 dB 20 dBu in 20 Hz 20 kHz AGC Detector Range 70 dBu to 0 dBu Ratio 1 1 to 5 1 Target Level Range 30 dB Limiter Threshold 15 dBu to 25 dBu Limiter Ratio gt 15 1 Input Common Mode Rejection 40 dB 1 kHz Output Noise 90 dBu broadband 422 Architects and Engine
23. t is a reduced dynamic range replica of its input centered around the target level As you adjust the TARGET LEVEL control it s very easy to see and hear the results A quick glance at the Output level VU meter will show you the exact effects of increasing or decreasing TARGET LEVEL The DETECTOR control The DETECTOR control increases or decreases the sensitivity of the 422 to low level audio signals and noise As you turn this control counterclockwise the 422 reaches down and increases the gain of low level audio and or noise The optimum setting of this control is entirely dependent upon the nature of the audio that the 422 is processing For example if the audio source is relatively clean and quiet like a CD the position of the DETECTOR may be noncritical To greatly increase the volume of the low level signals on the CD try a full counterclockwise setting of the control 45 On the other hand if you try the same extreme setting with a noisy cassette recording you may not find the results to be pleasing If you re processing a very noisy source then turn the detector control clockwise towards the 20 setting until the desired sound is achieved If you re unsure of where to position the DETECTOR control then start with it straight up in the twelve o clock position We ve found this to be a good compromise for unpredictable audio sources The Ratio control The Ratio control is used to increase or decrease the degree of
24. t needs extra emphasis A Note generally supplies extra information to help you to better use the 422 Identifies information that if not heeded may cause damage to the 422 or other equipment in your system Warning Identifies information that if ignored may be hazardous to your health or that of others Caution CAPITALS Controls switches or other markings on the 422 s chassis Boldface Strong emphasis Important Safety Instructions Please read and keep these instructions Heed and follow all warnings and instructions Install in accordance with the manufacturer s instructions Power Source This product is intended to operate from a power source that does not apply more than 250V rms between the power supply conductors or between either power supply conductor and ground A protective ground 2 Chapter 2 connection by way of the grounding conductor in the power cord is essential for safe operation Grounding The chassis of this product is grounded through the grounding conductor of the power cord To avoid electric shock plug the power cord into a properly wired receptacle before making any connections to the product A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Do not defeat the safety purpose of the grounding plug The grounding plug has two blades and a third grounding prong The third prong is provided for your safety When the pro
25. uct or make any additional warranties or representation regarding the Product or Product information on behalf of Symetrix Symetrix s total liability on any claim whether in contract tort including negligence or otherwise arising out of connected with or resulting from the manufacture sale delivery resale repair replacement or use of Product will not exceed the purchase price of the Product or any part thereof which gives rise to the claim In no event will Symetrix be liable for any incidental or consequential damages including but not limited to damage for lost revenue cost of capital claims of customers for service interruptions or failure to supply and costs and expenses incurred in connection with labor overhead transportation installation or removal of products or substitute facilities or supply houses as a result of Product failure This limited warranty gives Buyer certain rights Buyer may have additional rights under applicable law 11 O Symetrix O Symetrix Where to Get Service If outside of the USA If you have determined that your 422 requires repair services and you live outside of the United States please contact your local Symetrix dealer or distributor for instructions on how to obtain service If inside the USA Symetrix will perform in warranty or out of warranty service on any product it has manufactured for a period of five years from date of manufacture If you reside in the USA th
26. vided plug does not fit your outlet consult an electrician for replacement of the obsolete outlet Danger from Loss of Ground If the protective ground connection is lost all accessible conduc tive parts including knobs and controls that may appear to be insulated can render an electric shock Proper Power Cord Use only the power cord and connector specified for the product and your operating locale Use only a cord that is in good condition Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Proper Fuse The user accessible fuse is a part of the IEC AC inlet connector The fuseholder accepts 5 x 20 mm diameter fuses For 117 VAC operation the correct value is 0 5A 250 VAC standard For 230 VAC operation the correct value is 0 25A 250 VAC standard Operating Location Do not operate this equipment under any of the following condi tions explosive atmospheres in wet locations in inclement weather improper or unknown AC mains voltage or if improperly fused Do not install near any heat source such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Unplug this apparatus during lightning storms or when unused for long periods of time Stay Out of the Box To avoid personal injury or worse do not remove the product covers or panels Do not operate the product without the cov
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