Symetrix 531E,%20532E 电路图.pdf

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1、531E and 532E Graphic Equalizers User?s Guide 531E 532E / RadioFans.CN 收音机爱 好者资料库 i Table of Contents Chapter 1Introduction1 Chapter 2Operator Safety Summary2 Chapter 3Fast Set-Up3 Chapter 4Front Panel Controls4 Chapter 5Rear Panel Connections7 Chapter 6Troubleshooting8 Chapter 7Specifications9 Chap

2、ter 8Warranty and Service11 Appendix A Flow Chart13 Appendix B Input/Output Connections14 Appendix C Declaration of Conformity15 Rev A.02, 21 July, 1997 Symetrix part number 53531E0A02 Subject to change at our whim and fancy without notice. 1996, Symetrix, Inc. All right reserved. Symetrix is a regi

3、stered trademark of Symetrix, Inc. Mention of third-party products is for informational 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 manual

4、may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photcopying, scanning, recording or by any information storage and retrieval system, without permission, in writing, from Symetrix, Inc. Symetrix Inc. 14926 35th Ave. West Lynnwood, WA 98037 USA Tel (42

5、5) 787-3222 Fax (425) 787-3211 Email Website 531E 532E/ RadioFans.CN 收音机爱 好者资料库 1 531E 532E/ IntroductionChapter 1 Thank you for choosing a Symetrix Graphic Equalizer. We think you will be glad that you made this choice because, out of the sea of graphic eqs that you might have purchased, the 531E a

6、nd 532E are the only affordable equalizers that offer truly professional perfor- mance. How did we do this? First, because our design team believes that no one should have to settle for ?good enough?, they threw out the conven- tional design ideas and started from scratch. The result: a highly advan

7、ced filter topology that delivers extremely low distortion and noise, even at very high signal levels. Second, our state-of-the-art facility gives us the ability to build quickly, consistently, and in high volume, allowing us to keep our prices low. In addition, the 531E and 532E make extensive use

8、of surface-mount components. This allows us to cram more circuitry onto a smaller circuit board, further reducing costs. In fact, the 531E and 532E are a purist?s dream - audiophile sound quality, uncluttered control surface, and rugged reliability in one package. They offer thirty-one filter bands

9、per channel on ISO 1/3rd octave centers. Through the use of a global range switch, each band delivers either 6dB or 12dB of cut or boost. The grounded center detent position on each band serves as an on/off switch that completely removes that band from the audio signal path. In addition, they sport

10、12dB per octave High Cut and Low Cut filters. Each has a sweepable cutoff frequency and a control range that extends well into the sub/ultrasonic. Of course, the controls and features are secondary to the all important question: How does it sound? Consider the following facts. Our proprietary filter

11、 technology delivers the lowest noise floor of any graphic equalizer in the world, ultra-accurate summing, and minimal ringing and phase shift. The total harmonic distortion is less than 0.002%. Translation: the 531E and 532E are clean, clear, and musical-sounding. To ensure the highest level of yea

12、r-after-year performance, we build the 531E and 532E to touring standards. Double sided, glass epoxy circuit boards, metal shaft, plastic film slide potentiometers, gold-plated XLR connectors, and a heavy duty all-steel chassis deliver rugged reliability. You don?t have to treat these with kid glove

13、s. The details are worth noting, too. High-contrast front panel graphics make your control settings easy to read even in a darkened concert hall. Servo-balanced outputs remove all DC offset from the 531E or 532E?s output. This elimi- nates the need for DC blocking capacitors in the signal path while

14、 improving noise, distor- tion, and low-frequency performance. Of course, the 531E and 532E incorporate a high- current, internal power supply with an IEC- type detachable power cord. No ?wall warts? here! We recommend that you read this manual cover-to-cover. You?ll find the answers to most of your

15、 questions inside. However, if you are in a hurry, go directly to the Fast First-Time Setup section. It will get you started quickly. Should you have any comments or questions, please do not hesitate to contact us at the numbers/addresses below. Your calls are always welcome. Phone 425 787 3222 Fax

16、425 787 3211 Email EQUALIZER GRAPHIC +12 +6 20K16K12.5K10K 0 -6 -12 16K20K10K12.5K 8K6.3K5K4K3.15K2K2.5K1.25K8001K6305004003151.6K 6.3K8K4K5K3.15K2K2.5K1.25K8001K5003154006301.6K 2501602001006380125402531.520 +12 +6 50 2001602501006380125 18K HIGH CUT 12dB BYPASS 42K 3K65K MODE0 402531.5 -6 -12 2050

17、 22 LOW CUT 50 U INPUT 5K 115 6260 8 - +15 CLIPE 10dB 0dB POWER -20dB LEVEL 531 CUT FILTERS +6 +3 -3 -6 +6 +3 6dB -3 -6 +12 0 16K10K 12.5K20K -12 +12 16K12.5K10K20K -12 16K12.5K10K20K 0 8K5K4K6.3K3.15K2K2.5K1.25K8001K5004003156301.6K 4K8K6.3K5K3.15K2K2.5K 4K8K6.3K5K3.15K2K2.5K 1.25K1K800500400315630

18、 1.25K1K800500400315630 1.6K 1.6K 2502001601006380125402531.520 0 CH118K HIGH CUT MODE 50 2501602001006380125 2502001601006380125 402531.5 BYPASS 12dB 3K65K 18K HIGH CUT CH2 20 402531.5 12dB BYPASS 42K 3K65K MODE 20 0 50 50 42K 2250 LOW CUT U INPUT CLIP CH1 LEVEL 115 6260 8 +15 LOW CUT U INPUT 0dB -

19、20dB E CH2 LEVEL 115 5K 6260 8 +15 10dB -20dB 0dB POWER 2250 CLIP EQUALIZER GRAPHIC 532 5K10dB CH1 CUT FILTERS CH2 CUT FILTERS +6 -6 +6 -6 6dB 6dB RadioFans.CN 收音机爱 好者资料库 2 531E 532E/ The information in this summary is intended for persons who operate the equipment as well as repair personnel. Speci

20、fic warnings and cautions are found throughout this manual wherever they may apply; they do not appear in this summary. The notational conventions used in this manual and on the equipment itself are described in the following paragraphs. The lightning flash with arrowhead symbol within an equilatera

21、l triangle is intended to alert the user of the presence of uninsulated dangerous voltage within the products 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 pre

22、sence of important operating and mainte- nance (servicing) instructions in the literature accompanying the product (i.e. this manual). CautionTo 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

23、fully inserted. Terms Several notational conventions are used in this manual. Some paragraphs may use Note, Caution, or Warning as a heading or certain typefaces and capitalization are used to identify certain words. These are: NoteIdentifies information that needs extra emphasis. A Note generally s

24、upplies extra information to help you to better use the product. Equipment Markings Operator Safety SummaryChapter 2 CautionIdentifies information that, if not heeded, may cause damage to the Symetrix product or other equip ment in your system. WarningIdentifies information that, if ignored, may be

25、hazardous to your health or that of others. CAPITALSControls, switches or other markings on the products chassis. BoldfaceStrong emphasis. Power source - This product is intended to operate from a power source that does not apply more than 255Vrms between the power supply conductors or between eithe

26、r power supply conductor and ground. A protective ground connection, by way of the grounding conductor in the power cord, is essential for safe operation. Danger from loss of ground - If the pro- tective ground connection is lost, all accessible conductive parts, including knobs and controls that ma

27、y appear to be insulated, can render an electric shock. Proper power cord - Use only the power cord specified for the product. Use only a power cord that is in good condition. Operating location - Do not operate this equipment under any of the following condi- tions: explosive atmospheres, in wet lo

28、cations, in inclement weather, improper or unknown AC mains voltage, or if improperly fused. Stay out of the box - To avoid personal injury or injury to others, do not remove the product covers or panels. Do not operate the product without the covers and panels properly installed. AVIS:NE PAS OUVRIR

29、 Il ne se trouve a linterieur aucune piece pourvant entre repare lusager. SEE OWNERS MANUAL. VOIR CAHIER DINSTRUCTIONS. Sadresser a un reparateur comptent. RISQUE DE CHOC ELECTRIQUE No user serviceable parts inside. Refer servicing to qualified service personnel. CAUTION WARNING: TO REDUCE THE RISK

30、OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE DO NOT OPEN RISK OF ELECTRIC SHOCK 3 531E 532E/ ? ? ? ? ? ? ? Fast Set-Up This section is for those of you who are in too much of a hurry to read the rest of the manual. It provides just enough information to get the Graphic

31、Equalizer hooked up and working in your sound system. Chapter 3 Set the INPUT LEVEL control at the unity gain setting . This is noted as ?U? at the 12:00 position. Set all the graphic EQ slide potentiom- eters at 0dB, center detent position. Set LOW CUT control fully counterclock- wise and the HIGH

32、CUT control fully clockwise. Set the MODE switch to +/-12dB. Connect equalizer to AC power. Connect the audio inputs and outputs. See chapter 5 if you need more informa- tion. Let ?er rip. Now read the rest of this manual. ? 4 531E 532E/ Front Panel Controls FRONT PANEL Chapter 4 18K HIGH CUT 12dB B

33、YPASS 42K 3K65K MODE0 -6 22 LOW CUT 50 U INPUT 5K 115 6260 8 -+15 CLIP 10dB 0dB POWER -20dB LEVELCUT FILTERS 6dB -3 Input Level control - Use this control to adjust the 531E/532E?s input sensitivity. The range is - (infinity) to + 15dB. You can do three useful things with this knob: 1) Turn the knob

34、 down completely to mute your sound system - this can be very useful during troubleshooting, or if your console lacks an output mute switch. 2) Turn it down a little to give yourself enough headroom to make massive boosts in the EQ section without clipping. 3) Turn the knob up a little to boost a lo

35、w- level input signal - this maximizes your signal to noise ratio. Note:This feature, like everything else on the unit, will be bypassed if the 531E/ 532E loses power or gets disconnected from AC power. Output Level Meter - The four segment LED meter is designed to give you a quick, general idea abo

36、ut the level of the 531E/532E?s output. The bottom LED at -20dBu is a ?signal present? indicator. The next two LEDs, at 0dBu and +10dBu show the activity of a signal at nominal to somewhat hot line levels. The top LED, labeled CLIP, will light when a +20 dBu signal is detected at the input buffer am

37、p or output stage, though the 531E and 532E actually clip at +22dBu. Consider the CLIP LED a slightly early warning light. Note:If the INPUT LEVEL control is turned all the way down and you send a very hot input signal (greater than +20dBu) into the equalizer?s input, the CLIP LED will illuminate ev

38、en though there will be no output signal. This will occur because the input buffer amp, which is before the INPUT LEVEL control, is one of the points at which the CLIP LED detects excessive signal levels. Low Cut Filter - Diagram 1 illustrates the 12dB per octave low-frequency rolloff filter. This f

39、ilter is good for several things. It protects the low-frequency drivers in your sound system by removing potentially damaging subsonic audio material. This will also increase the efficiency of the amplifiers - why make them amplify signals that the speakers cannot reproduce? It can also clean up an

40、overly muddy sounding mix or improve speech intelligibility in announce systems by removing excessive low-frequency audio material. The range of this control is 6 Hz to 260 Hz. High Cut Filter - Diagram 2 shows the range of the 12dB per octave high-frequency rolloff filter (3kHz to 65kHz). Use this

41、control to remove unwanted noise or hiss that is greater in frequency than the highest frequency content of the program material you are trying to reproduce. This is especially pertinent to speech reinforcement and paging systems. Mode Switch - This space-saving, three position toggle switch control

42、s the cut/boost range of the faders AND functions as an EQ BYPASS when set in the middle position. If you require very fine cut and boost control for critical system voicing, put this switch in the +/-6dB mode. Permanent installations such as churches or performing arts theaters would be a good plac

43、e to use this mode. The +/-12dB mode is most useful for concert and club sound applications where quick (and sometimes extreme) control is desired. This, of course, will reduce the resolution of the fader, but the 60mm, long-throw faders on the 531E provide more than adequate resolution for most app

44、lications. In addition, we have adjusted the control taper so that the majority of the fader throw is dedicated to the +/- 6dB range, giving you greater resolution in that crucial area. t 5 531E 532E/ AUDIO PRECISION 531Evs23 MAY 96 10:54:00 -20.00 -15.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.00

45、0 AMPL(dBu) 201001k10k20k FREQ(Hz)AUDIO PRECISION 531Evs23 MAY 96 10:49:15 -20.00 -15.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.000 AMPL(dBu) 201001k10k20k FREQ(Hz) The Graphic Equalizer - The 531E/532E has 31 filter bands on ISO 1/3rd octave centers. The lowest filter band is on 20hz, the highes

46、t is 20kHz. Note the dual cut/boost scale on the side of the fader bank - the different scales correspond to the +/- 6dB and +/- 12dB positions of the MODE switch. Applied correctly, the graphic equalizer is a useful and powerful tool. It can make a mediocre system sound good. It can make a good sys

47、tem great. However, used incorrectly, it can make even a great system sound terrible. With this in mind, we would like to offer some tips to get you started in the right direction. Tip #1 Always listen to the PA system with the graphic EQ in bypass before you start fiddling with the sliders because

48、many ?frequency response? problems are actually something else entirely. If something sounds wrong, check your entire PA system for proper hookup and performance BEFORE you start working with the equalizer. For example: +12 0 16K10K 12.5K20K -12 +12 16K12.5K10K20K -12 16K12.5K10K20K 0 8K5K4K6.3K3.15

49、K2K2.5K1.25K8001K5004003156301.6K 4K8K6.3K5K3.15K2K2.5K 4K8K6.3K5K3.15K2K2.5K 1.25K1K800500400315630 1.25K1K800500400315630 1.6K 1.6K 2502001601006380125402531.520 0 CH1 MODE 50 2501602001006380125 2502001601006380125 402531.5 BYPASS 12dB CH2 20 402531.5 12dB BYPASS MODE 20 0 50 50 +6 -6 +6 -6 6dB 6dB +12 +6 20K16K12.5K10K 0 -6 -12 16K20K10K12.5K 8K6.3K5K4K3.15K2K2.5K1.25K8001K6305004003151.6K 6.3K8K4K5K3.15K2K2.5K1.25K8001K5003154006301.6K 2501602001006380125402531.520 +12 +6 50 2001602501006380125 12dB BYPASS MODE0 402531.5 -6 -12 2050 +6 +3 -3 -6