Model SCM268 User Guide MASTER 1 2 AUX IN 4 3 VE OUTPUT LE -20 icrop SCM268 m hone mixe -10 0 LMETER +6 +12 +18 POW ER r Four-channel Microphone Mixer Mélangeur à quatre canaux Mikrofonmischpult mit vier Kanälen Mezclador de micrófonos de cuatro canales Mixer microfonico a quattro canali 4 チャンネルマイクロホンミキサーです ©2008 Shure Incorporated 27D8646 (Rev. 6) Printed in U.S.A.
! IMPORTANT SAFETY INSTRUCTIONS ! 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. READ these instructions. KEEP these instructions. HEED all warnings. FOLLOW all instructions. DO NOT use this apparatus near water. CLEAN ONLY with dry cloth. DO NOT block any ventilation openings. Install in accordance with the manufacturer's instructions. DO NOT install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
! WICHTIGE SICHERHEITSHINWEISE ! 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Diese Hinweise LESEN. Diese Hinweise AUFHEBEN. Alle Warnhinweise BEACHTEN. Alle Anweisungen BEFOLGEN. Dieses Gerät NICHT in der Nähe von Wasser verwenden. NUR mit einem sauberen Tuch REINIGEN. KEINE Lüftungsöffnungen verdecken. Gemäß den Anweisungen des Herstellers einbauen. Nicht in der Nähe von Wärmequellen, wie Heizkörpern, Raumheizungen, Herden oder anderen Geräten (einschließlich Verstärkern) installieren, die Wärme erzeugen.
! ISTRUZIONI IMPORTANTI PER LA SICUREZZA ! 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. EGGETE queste istruzioni. CONSERVATE queste istruzioni. OSSERVATE tutte le avvertenze. SEGUITE tutte le istruzioni. NON usate questo apparecchio vicino all'acqua. PULITE l'apparecchio SOLO con un panno asciutto. NON ostruite alcuna apertura per l'aria di raffreddamento. Installate l'apparecchio seguendo le istruzioni del costruttore.
安全にお使いいただくために ☀椉ቧ㚜⹂ቑ⮶ሰሸቋ⒖扺ቑ䲚ㄵት㢝䯉ሼቮቂቤᇬ崳ቆቂ㔀ሧትሼቮቋ䞮ሻቮሶቋሯ㎂⸩ሸቯቮ␔⹈ት㶰ቑ⸩券ቑቫሩᇷ巵 ⛙ᇸᇷ㽷㎞ᇸቑℛቇ◉⒕ሺሧቡሼᇭ 巵⛙ 注意 ሶቑ嫷䯉␔⹈ት䎰尥ሺ崳ቆቂ♥ቭ㔀ሧትሼቮቋᇬ㸊ℰቡቂቒ摜⍆ት弯ሩ♾厌㊶ሯ㎂⸩ሸቯቮ␔⹈ቊሼᇭ ሶቑ嫷䯉␔⹈ት䎰尥ሺ崳ቆቂ♥ቭ㔀ሧትሼቮቋᇬ⍆⹂ት弯ሩ♾厌㊶ቡቂቒ䓸䤓㚜⹂ሯ䤉䞮ሼቮ♾厌㊶ሯ ㎂⸩ሸቯቮ␔⹈ቊሼᇭ 巵⛙ ವ 㠃⌨ቑ椪ቒᇬ彖㫋ቑሥቮ㠃⌨㕔㇢劔㉔ሽሷ䦇嵖ሲቃሸሧᇭ榊䄟ነዙኦቧኴኍቑ㚜⍆ᇬ䁁⇢ቧ䟿䓸ሯ孔函␔⏴ቭ手 ቶቃ⫃ ⚗ᇬ孔函ሯ楷ቧ䄎㺦ሸቬሸቯቂ⫃⚗ᇬ㷲デ⇫╤ሺቍሧ⫃⚗ᇬ孔函ት囌ቋሺቂ⫃⚗ቍቌᇬ孔函ሯ⇤ቬሮቑ䕅㏚ ቊ㚜⍆ሺቂ⫃⚗ቒᇬ㠃⌨ሯ㉔尐ቊሼᇭ ವ 孔函㻃䆃ቧሺሰሯⅧሮቍሧቫሩሺሲቃሸሧᇭ孔函ቑₙ啀䞅ቍቌቑ䁁⇢ቑ⏴ቆቂ䓸ት函ሮቍሧቊሲቃሸሧᇭ ವ 㦻完❐ቑ㟈抯ቒ峵ቢቍሧቊሲቃሸሧᇭ㟈抯ሺቂ⫃⚗ቒ㊹㒠ቧ完❐㟔椫ቑ☮⥯ቋቍቭቡሼᇭ 注意 ವ ሶቑ完❐ቒ㻃ቑ扠ሲቊ∎䞷ሺቍሧቊሲቃሸሧᇭ ವ 㘒棳ቒᇬ㉔ሽℍሧቂをቊ㕼ሧሲቃሸሧᇭ ವ 抩欷♲ት⫭
TABLE OF CONTENTS ENGLISH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHURE SCM268 DESCRIPTION FEATURES • • • • Four transformer-balanced microphone inputs Transformer-balanced output-switchable mic/line level Five -10 dB line-level inputs Six-segment LED output level meter • • • Built-in 12-volt phantom power Internal power transformer Built-in low-cut filter on microphone inputs (below 80 Hz) FRONT PANEL 1 2 3 4 5 1 Gain Controls (1-4). Adjusts gain for microphone level inputs and auxiliary level inputs 1-4. 4 Master Gain Control (MASTER).
GAIN CONTROL ENGLISH INPUT GAIN OUTPUT GAIN The gain control knobs 1-4, located on the front panel, adjust the gain for both microphone and auxiliary-level inputs of channels 1-4 (see Figure 1). For example, the channel 1 gain control is used for both the channel 1 microphone input (MIC LEVEL INPUT 1) and the channel 1 auxiliary level input (AUX LEVEL INPUT 1). The auxiliary gain control knob (AUX IN) affects only the auxiliary input (AUX IN).
CONNECTIONS the channel 4 auxiliary level input (AUX LEVEL INPUT 4). Connecting both auxiliary level and microphone level inputs to a single channel is not recommended because the SCM268 would not be able to independently mix the two sources. The following diagram illustrates a few of the many types of connections possible with the SCM268. Note that nothing is connected to the channel 4 microphone input (MIC LEVEL INPUT 4).
INSTALLATION SUPPLIED HARDWARE ENGLISH • • • • • • • • 4 rubber feet. For stand-alone installation. 1 rackmount bracket, long. For half-rack (single unit) installations. 1 rackmount bracket, short. For half-rack (single) or dual-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. 4 rackmount screws, 1 in. (2.5 cm). For mounting the unit in a rack. 4 plastic washers.
INTERNAL MODIFICATIONS WARNING! Voltages in this equipment are hazardous to life. No user-serviceable parts inside. Refer all servicing to qualified service personnel. DISASSEMBLY The following table lists the low-cut frequency corners for some of the most common capacitor values: Capacitor Value (μF) .033 .047 .068 .1 .22 .33 .47 .68 1.0 2.2 PHANTOM POWER DISABLE KNOB ASSEMBLY FIGURE 2 3. 4. 5.
SPECIFICATIONS ENGLISH 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. Polarity All inputs to all outputs are non-inverting Overload and Shorting Protection Shorting outputs, even for prolonged periods, causes no damage.
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