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Model SCM268E User Guide
1
SCM268E
Four-channel Microphone Mixer
四频道麦克风混音器
4 채널 마이크 믹서
©2008 Shure Incorporated Printed in U.S.A.
27AS8880 (Rev. 2)
3
2
+12
MASTER
+6 POWER
0
-20 -10
4
AUXIN
LEVELMETER
OUTPUT
SCM268microphonemixer
+18
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TABLE OF CONTENTS ENGLISH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 INTERNAL MODIFICATION
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ENGLISH ! IMPORTANT SAFETY INSTRUCTIONS ! 1. READ these instructions. USE only with a cart, stand, tripod, bracket, or table 12. 2. KEEP these instructions. specified by the manufacturer, or sold with the 3. HEED all warnings. apparatus. When a cart is used, use caution when 4. FOLLOW all instructions. moving the cart/apparatus combination to avoid 5. DO NOT use this apparatus near water. injury from tip-over. 6. CLEAN ONLY with dry cloth. 13. UNPLUG this apparatus during lightning storms or
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ENGLISH SHURE SCM268 DESCRIPTION The Shure Model SCM268 is a transformer-balanced, four-channel mi- and an auxiliary input channel. It can function as a primary or add-on mix- crophone mixer. Its simple, compact design delivers superior perfor- er for sound reinforcement, recording, broadcast, or audio-visual presen- mance and exceptional sound quality with low noise and a flat frequency tation systems. response. With the supplied hardware, the mixer's half-rack chassis mounts secure- Versatil
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GAIN CONTROL INPUT GAIN OUTPUT GAIN The gain control knobs 1-4, located on the front panel, adjust the gain for The master output gain control knob (MASTER) adjusts gain to both the both microphone and auxiliary-level inputs of channels 1-4 (see Figure 1). XLR balanced output (MIC/LINE LEVEL) and the auxiliary level output For example, the channel 1 gain control is used for both the channel 1 mi- (AUX LEVEL). crophone input (MIC LEVEL INPUT 1) and the channel 1 auxiliary level input (AUX LEVEL
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ENGLISH CONNECTIONS The following diagram illustrates a few of the many types of connections auxiliary level input (AUX LEVEL INPUT 4). Connecting both auxiliary lev- possible with the SCM268. Note that nothing is connected to the channel el and microphone level inputs to a single channel is not recommended 4 microphone input (MIC LEVEL INPUT 4). This is because channel 4 is because the SCM268 would not be able to independently mix the two being used for the consumer-level equipment connected t
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INSTALLATION SUPPLIED HARDWARE 2. Attach the short rackmount brackets to the outsides of the com- bined units with eight (8) of the bracket screws. • 4 rubber feet. For stand-alone installation. • 1 rackmount bracket, long. For half-rack (single unit) instal- lations. • 1 rackmount bracket, short. For half-rack (single) or du- al-mount installations. • 2 straddle brackets. For dual-mount or fixed installations. • 12 bracket screws, 1/4 in. (6 mm). For securing the brackets to the chassis. •
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ENGLISH INTERNAL MODIFICATIONS WARNING! Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. The following table lists the low-cut frequency corners for some of the DISASSEMBLY most common capacitor values: To access the printed circuit board (pc board) for internal modifications, Capacitor Value (μF) Low-Cut Frequency Corner (Hz) use the following steps: .033 803 1. Unplug the power cord. .047 564 2. Remove th
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SPECIFICATIONS Measurement Conditions (unless otherwise specified): Line voltage 120 Vac, 60 Hz (SCM268) or 230 Vac, 50 Hz (SCM268E); full gain; 1 kHz, one channel activated; source impedances: Mic 150 Ω, Aux Level 150 Ω; terminations: Line 600 Ω, Mic 600 Ω, Aux Out 10 kΩ. 12 V phantom power off. Frequency Response (Ref 1 kHz, controls centered) Polarity Microphone Inputs: 150 Hz to 20 Khz ±2 dB (built-in 80Hz All inputs to all outputs are non-inverting low-cut) Overload and Shorting Protecti
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SHURE Incorporated http://www.shure.com United States, Canada, Latin America, Caribbean: 5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A. Phone: 847-600-2000 U.S. Fax: 847-600-1212 Intl Fax: 847-600-6446 Europe, Middle East, Africa: Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414 Asia, Pacific: Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055 SHURE Incorporated http://www.shure.com SHURE Incorporated http://www.shure.com 美国、加拿大、拉丁美洲、加勒比海地区： 미국 , 캐나다 , 중남미 , 카리브해 지
