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Model SCM410/SCM410E User Guide
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SCM410/SCM410E
FOUR CHANNEL AUTOMATIC MICROPHONE MIXER
SCM410/SCM410E
MÉLANGEUR AUTOMATIQUE À QUATRE CANAUX
SCM410/SCM410E
AUTOMATISCHER 4-KANAL-MIKROFON-MISCHER
SCM410/SCM410E
CONSOLA MEZCLADORA AUTOMATICA DE MICROFONOS DE CUATRO CANALES
SCM410/SCM410E
MIXER AUTOMATICO A QUATTRO CANALI PER MICROFONI
©2009 Shure Incorporated Printed in U.S.A.
27D8690 (Rev. 10)
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INTELLIMIX
LIMITER
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TABLE OF CONTENTS DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3 FEATURES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3 OPERATING PRINCIPLES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3 FRONT PANEL - - - - - - -
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DESCRIPTION The Shure Model SCM410/E is a four-channel automatic microphone Each input channel has a two-band equalizer and three logic termi- mixer for use in sound reinforcement, audio recording, and broadcast nals. The equalizer reduces unwanted low-frequency audio pickup and applications. The SCM410 dramatically improves audio quality in any makes different microphone types-lavaliers, boundary and handheld- application where multiple microphones are required. Any low-imped- sound similar. T
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REAR PANEL 1 2 3 4 5 6 7 Power Connector: Unit is energized when the power cord is AUX OUT Phono Connector: Feeds consumer-level audio plugged into a 100-120 Vac (SCM410) or 220-240 Vac equipment, such as a tape recorder, VCR, or video camera. Not (SCM410E) power source. NOTE: There is no power On/Off affected by MIC/LINE switch. switch on this mixer. MIC/LINE XLR OUTPUT Connector: Can be set for micro- DIP Switch: The 4-position DIP switch provides additional func- phone or line-level o
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INSTALLATION SUPPLIED HARDWARE • 4 rubber feet • 10 bracket screws, 6 mm (1/4 in.) • 1 rackmount bracket, long • 4 rackmount screws, 2.54 cm (1 in.) • 1 rackmount bracket, short • 4 plastic washers • 2 straddle brackets • 4 wood screws, 1.25 cm (1/2 in.) RACK MOUNTING The SCM410 is supplied with hardware for mounting one or two units Dual Mixer (Full Rack) Installation to a 19-inch audio equipment rack. The hardware can also be used to 1. Place the two mixers side-by-side and connect them wi
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TABLE-TOP MOUNTING Adhere the four (4) supplied rubber feet to the bottom of the mixer at each corner. This will keep it from sliding and protect the table surface. ATTACHING RUBBER FEET FOR TABLE-TOP MOUNTING FIXED MOUNTING TOP MOUNT HANGING MOUNT 1. Fasten the straddle brackets to the recessed edges of the chas- 1. Fasten the straddle brackets to the top of the mixer. sis, using four (4) bracket screws. INSTALLING STRADDLE BRACKETS FOR TOP MOUNTING INSTALLING STRADDLE BRACKETS FOR HANG MOUNTI
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SCM410 CONNECTIONS 1. Connect microphone signal sources to the Channel Input connec- 3. Connect the SCM410 Mic/Line Level Output to the input of mixers, tors. Use conventional 2-conductor shielded audio cables. EQs, amplifiers or recorders. 2. If any condenser microphones are connected, set the +12V phantom 4. Connect the power cord to 100-120 Vac (SCM410) or 220-240 Vac power DIP switch to ON. (SCM410E) SHURE OR LINKING MULTIPLE MIXERS If more than four inputs are needed, multiple Shure SCM41
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BASIC MIXER OPERATION 1. Adjust each channel level so that its Overload LED flickers only 3. Adjust the Master level control for the required output level, as during very loud speech or noise. indicated by the output peak meter. The SCM410 is now ready for 2. Adjust the Low-Cut and High-Frequency controls adjacent to each use. Input Gain control so that the microphones sound similar. LIMITER Output limiters prevent distortion during loud program peaks without The limiter may be turned on via t
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SPECIFICATIONS Measurement Conditions (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM410) or 230 Vac, 50 Hz (SCM410E); full gain; 1 kHz, one channel activated; source impedances: Mic 150 Ω; terminations: Line/Mic Aux 10 k Ω Frequency Response (at 1 kHz, channel controls centered) Input LEDs 50 Hz to 20 kHz ±2 dB; –3 dB corner at 25 Hz Green on channel activation, red at 6 dB below clipping Voltage Gain (typical, controls full clockwise) Phantom Power 12 Vdc open-circuit through 6
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ADVANCED FUNCTIONS CAUTION: Use of Advanced Functions is recommended only for qualified audio technicians. LOGIC CONNECTION SPECIFICATIONS The SCM410 logic functions expand the range of installation and con- LOGIC CONNECTIONS trol options. Logic can be used for everything from simple cough switches Pin Logic Function Logic Function Pin to elaborate computer-controlled room systems. (Shure's AMS Update No. No. publication contains additional applications of advanced logic. This publi- 1 OVERRIDE
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SUGGESTED LOGIC APPLICATIONS This section contains suggestions on the uses of the SCM410's logic REMOTE CHANNEL-ON INDICATORS capabilities. Note that uses of these functions are not limited to the listed Remote indicators can be used to indicate when a talker's microphone applications. The user is limited only by imagination and creativity. For ad- is on. Connect the LEDs and a 5-volt supply to the GATE OUT pins (See ditional suggestions and solutions to installation problems, contact the Figure
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INHIBITING GATING FOR UNWANTED SOUNDS An existing sound system using 24-volt relays can be used with the SCM410 without modification if the relay coil current draw is under 500 mA. MaxBus attempts to activate only one microphone per sound source. Muting a microphone channel prevents its audio from appearing at the D=1N4148 mixer's output. However, the muted microphone still communicates with other mic channels via MaxBus. A sound source picked up by a muted mi- DD crophone will not activate othe
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INHIBIT FUNCTION EXTERNAL LOGIC DEVICES For information on the inhibit function, refer to the Internal Modifica- SCM410 logic levels are directly compatible with TTL and 5V CMOS tions section. logic families. Mixer logic may be used with 15V CMOS logic if a pull-up resistor is used with each GATE output. See Figure 15. REMOTE VOLUME CONTROL NOTE: For information on logic gate use, refer to the TTL Cookbook and CMOS Cookbook, both by D. Lancaster, Howard The level of the Aux or Master output c
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INTERNAL MODIFICATIONS • All Channel modifications in this section use Channel 1 as an • Only make changes to jumpers (X) and resistors (R). The circuit example. board contains holes where resistors are to be added. • For Channel modifications, the first character of the reference desig- NOTE: Remove AC power before opening the unit. nator indicates the channel number,(i.e., R1027 refers to a Channel 1 resistor, X2001 refers to a Channel 2 jumper, etc.). Modifications affecting the Master sectio
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CHANGING THE LIMITER THRESHOLD To change the limiter threshold from the preset value of +16 dBu, modify the circuitry according to the following table. CHANGE LIMITER THRESHOLD Limiter Limiter X9003 R9149 R9142 Threshold (dBu) DIP switch 0 On -- Remove 20k +4 On Short -- -- +8 Off Short -- -- +12 On -- Remove 110k +16 Οn-- -- -- (default) +20 On -- Remove 300k +24 On -- Remove 400k CHANGING HOLD TIME To change the hold time from the preset value of 0.4 seconds, modify the circuitry according to
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CHANGING OVERRIDE IN TO MUTE IN (FILIBUSTER MODE) This modification should only be performed with the Change MUTE IN Procedure: to Inhibit modification described above. This is only necessary if the Mute 1. Short jumper X1006. function is desired along with Filibuster Mode. 2. Remove resistors R1087 and R1082. CHANGING THE OFF-ATTENUATION LEVEL This procedure changes the off-attenuation level from -13 dB (as Procedure: supplied). Refer to the following table for attenuation levels and resis- 1
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United States: Europe, Middle East, Africa: Asia, Pacific: Canada, Latin America, Shure Incorporated Shure Europe GmbH Shure Asia Limited Caribbean: 5800 West Touhy Avenue Wannenäckestr. 28, Unit 301, 3rd Floor Shure Incorporated 5800 West Touhy Avenue Niles, IL 60714-4608 USA 74078 Heilbronn, Germany Citicorp Centre 18, Whitfield Road Niles, IL 60714-4608 USA Phone: 847-600-2000 Phone: 49-7131-72140 Causeway Bay, Hong Kong Fax: 847-600-1212 Fax: 49-7131-721414 Phone: 847-600-2000 Email: info@s
