Rane ME 15B EQ Operators Manual

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Manual-2 REAR PANEL DESCRIPTION FRONT PANEL DESCRIPTION  X LR INPUT jacks: These accommodates balanced signals. Rane adheres to the international and U.S. standard for balanced pin configurations: Pin 1 is chassis ground (neutral), pin 2 is hot (positive), and pin 3 is signal return (negative) . Choose between this and the ¼" TRS Input jack- use only one-they do not sum.  ¼" TRS INPUT jacks: These are TRS (tip-ring-sleeve) ¼" jacks accommodating either balanced or unbalanced signals. For un - balanced signals use a mono ¼" 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 ¼" plugs. Choose between this and the XLR Input jack- use only one-they do not sum. Refer to the included RaneNote, Sound System Interconnection for unbalanced wiring.  X LR OUTPUT jacks: These balanced outputs are wired per AES standards of pin 2 hot, as described above in  .  ¼" TRS OUTPUT jacks: These are TRS (tip-ring-sleeve) ¼" 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 wiring. LEVEL LEVELOL OL BYPASS BYPASS RANGE RANGEPOWER CHANNEL 1 630 100 25 4063 250 160 400 6.3k 1k 1.6k 2.5k 4k 16k 10k 630 100 25 40 63 250 160 400 6.3k 1k 1.6k 2.5k 4k 16k 10k ME 15B CHANNEL 2 ±12 ±12 12 -6- --6 120 + 12-6- --6 120 + 10024 86 10024 86 ±6 ±6 MICROGRAPHIC EQUALIZER 6-3- --36 6-3- --36 0 + 0 + 4 3 2 1 4 3 2 1 5 WIRING TIP / PIN 2 = POSITIVE RING / PIN 3 = NEGATIVE SLEEVE = SIGNAL GROUND PIN 1 = CHASSIS GROUN D MADE IN U.S.A. RANE CORP. CHANNEL 2 CHANNEL 1 OUTPUTINPUT OUTPUT ME 15B INPUT N108 50/60 Hz 12 WATTS 120 V WARNINGTO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL . FOR CONTINUED GROUNDING PROTECTION DO NOT REMOVE SCRE W 4 3 1 2 4 3 1 2  Filter level slide controls: Each of these sliders controls the output level of each of the bandpass filters. Center position is de - tented and grounded for guaranteed flat response.  Filter R A NGE switches: The gain range of the filter sliders is switchable (as a group) from ±6 dB for high resolution, to ±12 dB for maximum boost/cut capability.  BY PASS switches: When the button is pushed and the red indicator is lit, this Channel is in the BY PASS mode: 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.  LEV EL controls and 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 panel), use the BY PASS switch to determine the exact unity gain position of this LEVEL control by comparing EQ and BY PASS 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 intermittently, turn down either the equalizers LEVEL control(s) or reduce the output level of the preceding component to avoid audible distor - tion.  POW ER switch: As you have astutely surmised by now, this switch powers up the ME15B (as long as the power cord is plugged in correctly).

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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 configura - tion between units somewhere. Your mission, should you accept it, is to discover how your particular system wants to be ground - 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 another 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 on the chassis with a star washer to guarantee proper contact. ME 15B CONNECTION When first connecting the ME 15B to other components, leave the POWER switch o�- until the very last . This gives you a chance to make mistakes and correct them without damaging your fragile speakers, ears and nerves. INPUTS Both XLR and ¼" 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-o�-s. The wiring convention adheres to American, British and International standards of pin 2 or tip being 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 ground-it doesnt hurt, its just not necessary. Use pin 1, or the shell, for shield 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 di�-erentially between the two balanced leads; ground is not involved. For hum-free systems ground is used only for shielding. EXPANDING Expanding and/or daisychaining the Inputs and Outputs normally uses the ¼" jacks. Three parallel Input connectors allows driving a second signal processor or amplifier without special cabling. SIGNAL LEVELS Signal levels from -10 dBV to +4 dBu are considered normal and within range (at least 20 dB of headroom exists above these levels). Do not directly connect microphones into the ME 15B. These require a mic preamp.