Shure SCM410E manual

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Table of contents for the manual

  • Page 1

    SCM410/SCM410E FOUR CHANNEL AUT OMA TIC MICROPHONE MIXER Shure Brothers Incorporated 222 Hartrey Avenue Evanston IL 60202-3696 U.S.A. Model SCM410/SCM410E User Guide 27A8690 (SG)  1999, Shure Brothers Incorporated Printed in U.S.A. U.S. Patents 4,658,425; 5,297,210[...]

  • Page 2

    2 T ABLE OF CONTENTS DESCRIPTION 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FEA TURES 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 3

    3 DESCRIPTION The Shure Model SCM410/E is a four-channel automatic mi- crophone mixer designed for use in sound reinforcement, au- dio recording, and broadcast applications. The SCM410 dra- matically improves audio quality in any application where mul- tiple microphones are required. Any low-impedance dynamic or condenser microphone (including wire[...]

  • Page 4

    4 REAR P ANEL MODEL SCM410 REAR P ANEL FIGURE 2 1. Power Connector: Unit is energized when the power cord is plugged into a 100–120 V ac (SCM410) or 220–240 V ac (SCM410E) power source. Can be internally modified.Refer to the “Internal Modification” section. NOTE: There is no power On/Off switch on this mixer . 2. DIP Switch: The 4-position[...]

  • Page 5

    5 INST ALLA TION SUPPLIED HARDW ARE  4 rubber feet  1 rackmount bracket, long  1 rackmount bracket, short  2 straddle brackets  10 bracket screws, 6 mm (1/4 in.)  4 rackmount screws, 2.54 cm (1 in.)  4 plastic washers  4 wood screws, 1.25 cm (1/2 in.) RACK MOUNTING The SCM410 is supplied with hardware for mounting one or two[...]

  • Page 6

    6 T ABLE-TOP MOUNTING Adhere the four (4) supplied rubber feet to the bottom of the mixer at each corner , as shown in Figure 9. This will keep it from sliding and protect the table surface. A TT ACHING RUBBER FEET FOR T ABLE–TOP MOUNTING FIGURE 9 FIXED MOUNTING T op Mount 1. Fasten the straddle brackets to the recessed edges of the chassis, u si[...]

  • Page 7

    7 SCM410 CONNECTIONS 1. Connect microphone signal sources to the Channel Input connectors, as shown in Figure 14. Use conventional 2-con- ductor shielded audio cables. 2. I f any condenser microphones are connected, set the +12V phantom power DIP switch to ON. 3. Connect the SCM410 Mic/Line Level Output to the input of mixers, EQs, amplifiers or re[...]

  • Page 8

    8 BASIC MIXER OPERA TION 1. Adjust each channel level so that its Overload LED flickers only during very loud speech or noise. 2. Adjust the Low-Cut and High-Frequency controls adjacent to each Input Gain control so that the microphones sound similar . 3. Adjust the Master level control for the required output level, as indicated by the output peak[...]

  • Page 9

    9 SPECIFICA TIONS Measurement Conditions (unless otherwise specified): Line voltage 120 V ac, 60 Hz (SCM410) or 230 V ac, 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) 50 Hz to 20 kHz ± 2 dB; -3 dB corner at 25 [...]

  • Page 10

    10 Replacement Parts Knob, Master (white) 95A8238 . . . . . . . . . . . . . . . . . . . . . . . Knob, Channel Gain (blue) 95B8238 . . . . . . . . . . . . . . . . . Line (Power) Cord (SCM410) 95A8762 . . . . . . . . . . . . . . . Line (Power) Cord (SCM410E) 95A8778 . . . . . . . . . . . . . . Link Cable 95A8889 . . . . . . . . . . . . . . . . . . . [...]

  • Page 11

    11 ADV ANCED FUNCTIONS CAUTION : Use of Advanced Functions is recommended only for qualified audio technicians. LOGIC CONNECTION SPECIFICA TIONS The SCM410 logic functions expand the range of installation an d control options. Logic can be used for everything from sim- ple cough switches to elaborate computer-controlled room systems. (Shure’s AMS[...]

  • Page 12

    12 SUGGESTED LOGIC APPLICA TIONS This section contains suggestions on the uses of the SCM410’s logic capabilities. Note that uses of these functions ar e not limited to the listed applications. The user is limited only by imagination and creativity . For additional suggestions and solutions to installation problems, contact the Shure Applica- tio[...]

  • Page 13

    13 Inhibiting Gating for Unwanted Sounds MaxBus attempts to activate only one microphone per sound source. Muting a microphone channel prevents its audio from appearing at the mixer ’ s output. However , the muted micro- phone still communicates with other mic channels via Max- Bus. A sound source picked up by a muted microphone will not activate[...]

  • Page 14

    14 Inhibit Function For information on the inhibit function, refer to the Internal Modifications section. Remote V olume Control Th e level of the Aux or Master output can be controlled from an external VCA (V oltage Controlled Amplifier) such as the RU- VCA1 from Radio Design Labs (T el. 1–800–281–2683, or www .rdlnet.com). T o connect a VCA[...]

  • Page 15

    15 INTERNAL MODIFICA TIONS W ARNING: V oltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. NOTE: • Only make changes to jumpers (X) and resistors (R). The circuit board contains holes where resistors are to be added. • For Channel modifications, the first charact[...]

  • Page 16

    16 INSERTING AN INPUT LINE P AD T o insert a 40 dB line pad for a given microphone input, remove the resistors specified in the following table. Channel Remove Resistor 1 R1005, R1006 2 R2005, R2006 3 R3005, R3006 4 R4005, R4006 DISABLING THE MASTER LEVEL CONTROL Th e Master gain control can be disabled to prevent tampering. Refer to the following [...]

  • Page 17

    17 When both MUTE IN and OVERRIDE IN logic are grounded, the Override mode will take precedence (as supplied, the MUTE IN takes precedence over OVERRIDE IN). Procedure: 1. Short jumper X1005. 2. Remove resistor R1087. DEAD ZONE ON MUTE IN DEFEA T As supplied, MUTE IN is intended for use as a momentary cough button or privacy function (mute when nec[...]

  • Page 18

    18 This modification is equivalent to shorting one of the channel OVERRIDE IN t o the LOGIC GROUND pin via the high density DB-15 logic connector . With this modification, a channel is al- ways on. Procedure: Short jumper X1003. SHORTING MUTE IN T O LOGIC GROUND INTERNALL Y This modification is equivalent to shorting a channel MUTE IN to the LOGIC [...]