Symetrix 533e_ug 电路图.pdf

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1、533E Graphic Equalizer User?s Guide533E 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 Chapter 8Warranty and

2、Service10 Appendix A Flow Chart12 Appendix B Input/Output Connections13 Appendix C Declaration of Conformity14 Rev A.02, 21 July 1997 Symetrix part number 53533E0A02 Subject to change at our whim and fancy without notice. 1997, Symetrix, Inc. All right reserved. Symetrix is a registered trademark of

3、 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 may be reproduced o

4、r 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. 6408 216th St. SW Mountlake Terrace, WA 98043 USA Tel (425) 778-7728 Fax (425) 778-7

5、727 Email Website 533E RadioFans.CN 收音机爱 好者资料库 1 533E 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 533E is one of the only affordable equalizers

6、 that offer truly professional performance. 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 advanced filter topology that delivers extremely

7、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 533E makes extensive use of surface-mount components. This allows us to cram

8、more circuitry onto a smaller circuit board, further reducing costs. In fact, the 533E is a purist?s dream - audio- phile sound quality, uncluttered control surface, and rugged reliability in one package. They offer thirty-one filter bands per channel on ISO 1/3rd octave centers. Through the use of

9、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 12dB per octave High Cut and Low Cut filters. Each has a swe

10、epable 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 technology delivers the lowest noise floor of any graphic e

11、qualizer in the world, ultra-accurate summing, and minimal ringing and phase shift. The total harmonic distortion is less than 0.002%. Translation: the 533E is clean, clear, and musical-sounding. To ensure the highest level of year-after-year performance, we build the 533E to touring standards. Doub

12、le sided, glass epoxy circuit boards, metal shaft, plastic film slide potenti- ometers, gold-plated XLR connectors, and a heavy duty all-steel chassis deliver rugged reliability. You don?t have to treat these with kid gloves. The details are worth noting, too. High-contrast front panel graphics make

13、 your control settings easy to read even in a darkened concert hall. Servo-balanced outputs remove all DC offset from the 533E?s output. This eliminates the need for DC blocking capacitors in the signal path while improving noise, distortion, and low-frequency performance. Of course, the 533E incorp

14、orates 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 questions inside. However, if you are in a hurry, go directly to the Fast First-Time Setup section

15、. 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 425 778 7728 Fax 425 778 7727 Email +12 20K16K10K 12.5K 0 -12 8K5K6.3K3.15K2K2.5K4K1.25K8001K6305004003151.6K +12 0

16、-12 20K16K10K 12.5K8K5K6.3K3.15K2K2.5K4K1.25K8001K6305004003151.6K 8K1.25K3154005006308001K3.15K1.6K2.5K2K4K6.3K5K20K12.5K10K16K 2501602001006380125402531.520 +12 50 HIGH CUT 18K MODE CH1 BYPASS 12dB 42K 0 -12 65K3K CH1 LEVEL LOW CUT 2250 INPUT U 5K 1158 CLIP 10dB 0dB +15 -20dB E 2606 533 CH1 CUT FI

17、LTERS +12 18K MODE CH2 12dB BYPASS 3K65K 42K 0 HIGH CUT 2502001601006380125402531.520 -12 50 CH2 LEVEL 2250 INPUT U 115 6260 8 +15 5K CLIP 0dB 10dB LOW CUT EQUALIZER POWER -20dB CH2 CUT FILTERS 202531.540506380100125160200250 GRAPHIC +6 -6 +6 -6 +6 6dB -6 +6 -6 6dB RadioFans.CN 收音机爱 好者资料库 2 533E The

18、 information in this summary is intended for persons who operate the equipment as well as repair personnel. Specific 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

19、 itself are described in the following paragraphs. 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 products enclosure that may be of sufficient magnitude to constitute a risk of electri

20、c shock to persons. The exclamation point within an equilateral triangle is intended to alert the user of the presence 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 pol

21、arized 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 or certain typefaces and capitalization are us

22、ed to identify certain words. These are: NoteIdentifies information that needs extra emphasis. A Note generally supplies 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

23、 the Symetrix product or other equip ment in your system. WarningIdentifies information that, if ignored, may be 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 opera

24、te from a power source that does not apply more than 255Vrms between the power supply conductors or between either 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

25、the pro- tective ground connection is lost, all accessible conductive parts, including knobs and controls that may 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 l

26、ocation - 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. Stay out of the box - To avoid personal injury or injury to others, do not remove the product

27、covers or panels. Do not operate the product without the covers and panels properly installed. AVIS:NE PAS OUVRIR 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 us

28、er serviceable parts inside. Refer servicing to qualified service personnel. CAUTION WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE DO NOT OPEN RISK OF ELECTRIC SHOCK 3 533E ? ? ? ? ? ? ? Fast Set-Up This section is for those of you who are in

29、too much of a hurry to read the rest of the manual. It provides just enough information to get the Graphic 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

30、potentiom- eters at 0dB, center detent position. Set LOW CUT control fully counterclock- wise and the HIGH 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

31、read the rest of this manual. ? 4 533E Front Panel Controls FRONT PANEL Chapter 4 18K HIGH CUT 12dB BYPASS 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 533E?s input sensitivity. The

32、range is - (infinity) to + 15dB. You can do three useful things with this knob: 1) Turn the knob 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 ma

33、ke massive boosts in the EQ section without clipping. 3) Turn the knob up a little to boost a low- level input signal - this maximizes your signal to noise ratio. Note:This feature, like everything else on the unit, will be bypassed if the 533E loses power or gets disconnected from AC power. Output

34、Level Meter - The four segment LED meter is designed to give you a quick, general idea about the level of the 533E?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 L

35、ED, labeled CLIP, will light when a +20 dBu signal is detected at the input buffer amp or output stage, though the 533E actually clips 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 (gre

36、ater than +20dBu) into the equalizer?s input, the CLIP LED will illuminate even 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 - D

37、iagram 1 illustrates the 12dB per octave low-frequency rolloff filter. This filter 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

38、 amplify signals that the speakers cannot reproduce? It can also clean up an 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

39、 the 12dB per octave high-frequency rolloff filter (3kHz to 65kHz). Use this 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 s

40、ystems. Mode Switch - This space-saving, three position toggle switch controls the cut/boost range of the faders AND functions a 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 installat

41、ions such as churches or performing arts theaters would be a good place 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 45mm, mid-throw

42、faders provide more than adequate resolution for most applications. 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. 5 533E AUDIO PRECISION 531Evs23 MAY 96 10:54:00 -20.00 -1

43、5.00 -10.00 -5.000 0.0 5.0000 10.000 15.000 20.000 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 533E has 31 filter bands on ISO 1/3rd octave centers pe

44、r channel. The lowest filter band is on 20hz, the highest 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 m

45、ake a mediocre system sound good. It can make a good system 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 by

46、pass before you start fiddling with the sliders because 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: m Make sure that all the

47、 speakers are working properly. Check each driver within an enclosure separately. Large sound systems may have many identical drivers in an array, making it hard to pinpoint blown, or out-of-phase drivers by ear. m Adjust your overall system gain structure so that all of the components in the signal

48、 path are operating at nominal levels. m Check your cabling! The vast majority of sound system problems are related to cables. Intermittent connections, polarity reverses, bad grounds, shorts, etc. are all examples of problems that can manifest themselves as ?frequency response? problems. For instan

49、ce, if the cable feeding your stage left subwoofer array is polarity reversed, causing the left subwoofer array to be out-of-phase with the right subwoofer array, you will percieve this as a lack of adequate low end power. Obviously, no amount of work with the graphic equalizer will fix this problem. Of course, the larger the system, the more there is to check. Be thor- ough. -6 +6 +12 20K16K10K 12.5K 0 -12 8K5K6.3K3.15K2K2.5K4K1.25K8001K6305004003151.6K 8K1.25K3154005006308001K3.15K1.6K2.5K2K4K6.3K5K20K12.5K10K16K 2501602001006380125402531.520 +12 5