Rane ME 15B EQ Operators Manual 电路图.pdf

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1、Manual-1 OPERATORS MANUALME 15B microGRAPHIC EQUALIZER QUICK START If this is your fi rst equalizer, please do yourself and your speakers a favor and read the complete manual. “An ounce of prevention.,” and all that. You may use either the XLR or TRS connectors for Inputs or Outputs. Hook-up is intu

2、itive. Just follow the silk- screened instructions on the rear of the unit. Polarity convention is per IEC/ANSI/AES standards of pin 2 positive, pin 3 negative and pin 1 shield. The ME 15B does not invert the signal. Only connect one INPUT type per channel. The XLR and TRS WEAR PARTS: This product c

3、ontains no wear parts. LEVELLEVELOLOLBYPASSBYPASSRANGERANGEPOWER CHANNEL 16301002540632501604006.3k1k1.6k 2.5k4k16k10k6301002540632501604006.3k1k1.6k 2.5k4k16k10k ME 15B CHANNEL 2 1212 12 6 6 12 0 + 12 6 6 12 0 + 100 2 4 8 6 100 2 4 8 6 66 MICROGRAPHIC EQUALIZER 6 3 3 6 6 3 3 6 0 + 0 + Inputs do not

4、 sum, dont use both, pick one or the other. You may, however, use both types of OUTPUTS simultanesously if desired. Anyone familiar with other graphic equalizers fi nds the ME 15B just as familiar. Setting curves is as easy as it is on all Rane graphics thanks to our innovative constant-Q circuitry.

5、 If you feel you want more information on setting up your curves, please read on. If you are familiar with equalizers, then hook-up, plug-in, turn-on and go! RadioFans.CN 收音机爱 好者资料库 Manual-2 REAR PANEL DESCRIPTION FRONT PANEL DESCRIPTION XLR INPUT jacks: These accommodates balanced signals. Rane adh

6、eres to the international and U.S. standard for balanced pin confi gurations: Pin 1 is chassis ground (neutral), pin 2 is hot (positive), and pin 3 is signal return (negative). Choose between this and the TRS Input jackuse only onethey do not sum. TRS INPUT jacks: These are TRS (tip-ring-sleeve) jac

7、ks accommodating either balanced or unbalanced signals. For un- balanced signals use a mono TS plug (single conductor with shield), and keep its length under 10 feet (3 meters) to avoid hum and noise. For balanced signals use microphone cable (two conductor with shield) with TRS plugs. Choose betwee

8、n this and the XLR Input jackuse only onethey do not sum. Refer to the included RaneNote, “Sound System Interconnection” for unbalanced wiring. XLR OUTPUT jacks: These balanced outputs are wired per AES standards of pin 2 “hot”, as described above in . TRS OUTPUT jacks: These are TRS (tip-ring-sleev

9、e) balanced jacks compatible with either balanced or unbalanced systems. For balanced systems, use a microphone cable wired with pin 1 is chassis ground (neutral), pin 2 is hot (positive), and pin 3 is signal return (negative). Refer to the RaneNote, “Sound System Interconnection” for unbalanced wir

10、ing. LEVELLEVELOLOLBYPASSBYPASSRANGERANGEPOWER CHANNEL 16301002540632501604006.3k1k1.6k 2.5k4k16k10k6301002540632501604006.3k1k1.6k 2.5k4k16k10k ME 15B CHANNEL 2 1212 12 6 6 12 0 + 12 6 6 12 0 + 100 2 4 8 6 100 2 4 8 6 66 MICROGRAPHIC EQUALIZER 6 3 3 6 6 3 3 6 0 + 0 + 432143215 WIRING TIP / PIN 2 =

11、POSITIVE RING / PIN 3 = NEGATIVE SLEEVE = SIGNAL GROUND PIN 1 = CHASSIS GROUND MADE IN U.S.A. RANE CORP. CHANNEL 2CHANNEL 1 OUTPUTINPUTOUTPUT ME 15B INPUT N108 50/60 Hz 12 WATTS 120 V WARNING TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMO

12、VE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. FOR CONTINUED GROUNDING PROTECTION DO NOT REMOVE SCREW 43124312 Filter level slide controls: Each of these sliders controls the output level of each of the bandpass fi lters. Center position is de- tented and grounde

13、d for guaranteed fl at response. Filter RANGE switches: The gain range of the fi lter sliders is switchable (as a group) from 6 dB for high resolution, to 12 dB for maximum boost/cut capability. BYPASS switches: When the button is pushed and the red indicator is lit, this Channel is in the BYPASS mo

14、de: signal is routed directly from the Input to the Output without passing through any active circuitry (often referred to as “hard-wire bypass”). Use this switch to compare equalized and unequalized material, or to bypass the equalizer in the event of power loss or unit failure. LEVEL controls and

15、OL indicators: These control the level of signal coming into the ME 15B. Turn this control down if its OL (OverLoad) lights up steadily (meaning too strong an Input signal). Since actual unity gain depends on varying slider settings (which is why we have not marked a unity gain position on the front

16、 panel), use the BYPASS switch to determine the exact unity gain position of this LEVEL control by comparing EQ and BYPASS volumes. The OL indicator lights up if any section of the ME 15B is within 3 dB of clipping. Occasional blinking of these LEDs are acceptable, but if they remains on more than i

17、ntermittently, turn down either the equalizers LEVEL control(s) or reduce the output level of the preceding component to avoid audible distor- tion. POWER switch: As you have astutely surmised by now, this switch powers up the ME15B (as long as the power cord is plugged in correctly). RadioFans.CN 收

18、音机爱 好者资料库 Manual-3 IMPORTANT NOTE CHASSIS GROUNDING If after hooking up your system it exhibits excessive hum or buzzing, there is an incompatibility in the grounding confi gura- tion between units somewhere. Your mission, should you accept it, is to discover how your particular system wants to be g

19、round- ed. Here are some things to try: 1. Try combinations of lifting grounds on units that are supplied with ground lift switches or links. 2. If your equipment is in a rack, verify that all chassis are tied to a good earth ground, either through the line cord grounding pin or the rack screws to a

20、nother grounded chassis. 3. Units with outboard power supplies do NOT ground the chassis through the line cord. Make sure that these units are grounded either to another chassis which is earth grounded, or directly to the grounding screw on an AC outlet cover by means of a wire connected to a screw

21、on the chassis with a star washer to guarantee proper contact. ME 15B CONNECTION When fi rst connecting the ME 15B to other components, leave the POWER switch off until the very last. This gives you a chance to make mistakes and correct them without damaging your fragile speakers, ears and nerves. I

22、NPUTS Both XLR and TRS Inputs are wired in parallel and are actively balanced. Each works equally well. Choose strictly from a required hardware point-of-view, there will be no performance trade-off s. The wiring convention adheres to American, British and International standards of pin 2 or tip bei

23、ng hot, pin 3 or ring being return, and pin 1 or sleeve being shield. Unbalanced operation involves using only pin 2 or tip as signal, and pin 1 or sleeve as shield or ground. It is not necessary to short any inputs to groundit doesnt hurt, its just not necessary. Use pin 1, or the shell, for shield

24、 ground. OUTPUTS The Outputs mimic the Inputs. Balanced output requires using pin 2 or tip, and pin 3 or ring for the signal. It does not require pin 1 or shield. The signal exists diff erentially between the two balanced leads; ground is not involved. For hum-free systems ground is used only for sh

25、ielding. EXPANDING Expanding and/or daisychaining the Inputs and Outputs normally uses the jacks. Three parallel Input connectors allows driving a second signal processor or amplifi er without special cabling. SIGNAL LEVELS Signal levels from -10 dBV to +4 dBu are considered normal and within range

26、(at least 20 dB of headroom exists above these levels). Do not directly connect microphones into the ME 15B. These require a mic preamp. RadioFans.CN 收音机爱 好者资料库 Manual-4 Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 USA TEL 425-355-6000 FAX 425-347-7757 WEB OPERATING INSTRUCTIONS Insur

27、ing the proper level of gain though the ME 15B is just as important as adjusting the equalizer bands. Improper gain distribution is a common cause of loss of system headroom and less than optimum noise performance. The OverLoad LED informs of an imminent or passed overload to the equalizer. Occasion

28、al blinking of the OL with program source material is fi ne, indicating optimized signal-to- noise performance of the ME 15B. Run the ME 15B with an input signal that is as hot as possible without the OL lighting more than occasionally. The BYPASS switch allows comparison of equalized versus un-equa

29、lized signal. It is also useful in adjusting the level of the ME 15B for unity gain and best signal-to-noise performance. The gain of the ME 15B is optimized when there is no sound level diff erence between the bypassed and the active positions. The overall gain range of the level control for the ME

30、 15B is off to +6 dB for unbalanced operation, or off to +12 dB for balanced operation. The level diff erence between the equalizer in bypass or active can be signifi cant. Adjust the LEVEL control so the signal level is the same between the bypassed and active posi- tions of the BYPASS switch. GETT

31、ING STARTED Here is one method of setting your equalizer that works well. Begin with the following settings: 1. Engage the BYPASS switch. (switch depressed, BYPASS LED on.) 2. Put all sliders in their center position (0 dB). The center posi- tion has a grounded detent. 3. Position the LEVEL controls

32、 about “6” for unbalanced opera- tion and “7” for balanced operation. 4. Apply a signal to the system. 5. Verify the OL LED is not onoccasionally blinking during extreme peaks indicates an optimal setting. But if it lights up a lot or lights steadily, lower the output level of the previous device in

33、 the signal chain. 6. Release the BYPASS switch and begin adjusting the equalizer fi lters. 7. During fi lter band adjustments, if the OL LED lights more than occasionally, turn down the output of the previous de- vice in the signal chain. 8. Once all fi lter bands are adjusted to your liking, compa

34、re the signal loudness with the equalizer bypassed and active. Adjust the LEVEL controls on the ME 15B so there is no diff erence between the levels of bypassed versus active. 9. The last step is to reconfi rm that the OL LED lights only when there are large signal spikes in the program material, as

35、 in step 5 above. For insight into how to use an equalizer, to alleviate acoustic problems or to adjust the overall tone of the program material, please read the following two sections. ACOUSTIC COMPENSATION A graphic equalizer may be used to correct many acoustic problems. However, one should fully

36、 understand the ramifi ca- tions of doing so. Acoustic problems are generally not consistent across the entire area of sound coverage. This is much more of a problem when setting up a sound system for large venues. In a typical large room or hall, there will be areas that have acoustic reinforcement

37、 problems and other areas where certain frequen- cies are almost entirely canceled out. Try to seek an acoustic remedy for acoustic problems whenever possible. When this is not possible or feasible, an equalizer may be used to compensate for an acoustic problem. But the problem is only improved at t

38、he point where the measurement is taken, other locations in the room may be adversely aff ected by the equalizer setting. For this reason, measure the acoustic response of the system from several locations and average the equalizers setting. Doing this helps most locations in the venue to have an eq

39、ual sound quality. The best way to “see” what the acoustic signature of the room is doing to sound is to use a real time analyzer or any of the many computerized measurement systems. Using these devices to analyze the response of the room and the sound system is the only accurate means available for

40、 setting an equalizer properly. Equalization can be like spice in the hands of a master chef. A little goes a long way in improving sound quality, too much and the mix is spoiled. If modest amounts of equalization (6-8 dB) do not solve the problem, it is best remedied by other means. Avoid adding la

41、rge amounts of boost below 63 Hz, especially when using vented bass cabinets. Boosting frequencies below the vented enclosures low frequency cutoff can easily cause over excursion of the speakers cone, causing premature failure. In ad- dition, boosting low frequencies can make your power amplifi er

42、run hotter, leading to premature amplifi er failure. When equalizer adjustment is completed, compare the un- equalized sound with the equalized sound by alternately engag- ing the BYPASS switch. Use familiar source material and walk around in the sound coverage area to insure that no anomalies have

43、been introduced into the sound system. If it sounds good, youre done. TONE CONTOURING If a ME 15B is used for tone contouring by ear, be careful about adding upper bass (63 Hz to 200 Hz) as this causes “mud- diness” or loss of defi nition. (Also see the previous warning about boosting frequencies be

44、low 63 Hz.) Middle frequency problems usually express themselves by vocals having a nasal quality (too much mid band boost) or vocals not being easily understandable (usually caused by mid band frequencies being under represented in the overall sound). High band problems show as “sizzle” not good, and is sometimes caused by too much high frequency boosting. This is most obvious with cymbals and hi-hats. To use the cooking metaphor, high frequencies should simmer, not sizzle. 106285