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User Guide

©

200

8

Shure Incorporated

27A8868 (Rev.

2

)

Printed in U.S.A.

SCM810/SCM810AZ

SCM810/SCM810AZ

EIGHT-CHANNEL MICROPHONE MIXER

EIGHT-CHANNEL MICROPHONE MIXER

SCM810/SCM810C

SCM810/SCM810C

SCM810/SCM810J

SCM810/SCM810J

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Содержание SCM810

Страница 1: ...d 27A8868 Rev 2 Printed in U S A SCM810 SCM810AZ SCM810 SCM810AZ EIGHT CHANNEL MICROPHONE MIXER EIGHT CHANNEL MICROPHONE MIXER SCM810 SCM810C SCM810 SCM810C SCM810 SCM810J SCM810 SCM810J チチャャンンネネルルママイイククロロホホンンミミキキササーー 8 ...

Страница 2: ...type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wider blade or the third prong are provided for your safety If the provided plug does not fit into your out let consult an electrician for replacement of the obsolete outlet 10 PROTECT the power cord from being walked on or pinched particularly at plugs conve...

Страница 3: ...low frequency rolloff and high frequency shelving for each channel Channel activation and clipping indicators Peak responding output limiter with selectable thresholds and LED indicator Active balanced microphone level XLR inputs and an active bal anced Mic Line level XLR output Aux level input with manual level control Front panel headphones output with level control Linking capability for up to ...

Страница 4: ... when plugged into a power source the rocker switch turns the unit on 쐉 Microphone Logic DB 25 male connector interfaces with each channel s GATE OUT MUTE IN and OVERRIDE IN logic terminals See the Suggested Logic Applications section NOTE THIS IS NOT AN RS 232 PORT 씈 DIP Switch The 7 position DIP switch provides setup options for the mixer see DIP Switches section 씉 LINK IN OUT Jacks Allow multip...

Страница 5: ...second Off Attenuation Changes the off attenuation level from 15 dB to infinity With the 15 dB setting an unused microphone is 15 dB lower in level than when it is activated With the setting an unused microphone is com pletely off Limiter Threshold Changes the output limiter threshold Settings are OFF factory setting 16 dBm 8 dBm or 4 dBm see Internal Modifica tions for other threshold settings Li...

Страница 6: ...toring connect headphones to the front panel 1 4 inch PHONES jack 5 Connect the power cord to 120 Vac SCM810 or 230 Vac SCM810E If the operating voltage is to be changed refer to the Internal Modifications section AUDIO CONNECTIONS FIGURE 5 OUTPUT LIMITER SETTINGS The output limiter prevents distortion during loud program peaks without af fecting normal program levels This prevents overloading of ...

Страница 7: ... AN AUTOMATIC MIXER When setting up a sound system which has an outboard equalizer or feed back controller in the signal chain set the SCM810 to MANUAL This acti vates all microphone inputs so every possible feedback path is open With the SCM810 in MANUAL mode equalize the sound system and or Ring Out the room to set the feedback controller After equalizing the sound system set the SCM810 to AUTOM...

Страница 8: ...clicks may re sult if this is not done GLOBAL LOCAL FUNCTIONS The Global Local switch selects which input channels appear at that linked mixer s output Set to the Global position all input channels appear at that mixer s output Set to the Local position only its own eight input channels appear at that mixer s output The Master level control in any mode only controls the level of its own output The...

Страница 9: ...e300 ms Indicator Lights red when limiting occurs Input LEDs Green on channel activation red at 6 dB below clipping Phantom Power 46 Vdc open circuit through 6 8 kΩ series resistance per DIN 45 596 Operating Voltage SCM810 120 Vac rated nominal see Voltage Selection for 230 Vac op eration 50 60 Hz 200 mA SCM810E 230 Vac rated nominal see Voltage Selection for 120 Vac operation 50 60 Hz 100 mA Temp...

Страница 10: ...tinct from the SCM810 audio ground Make all logic ground connections to this pin including power supply ground of external logic circuitry To avoid switching clicks do not connect logic ground to audio chassis or rack grounds Logic controls are accessed at the DB 25 multi pin connector on the rear panel Figure 11 The pin connections are given in the following table LOGIC CONNECTOR FIGURE 11 LOGIC ...

Страница 11: ... and Logic Ground pins see Figure 13 the chairperson is shown as Channel 1 An alternative to a switch is to connect the chairperson s GATE OUT to the MUTE IN of other channels When the chairperson s microphone activates all other microphones mute CHAIRPERSON CONTROLLED MUTING FIGURE 13 Remote Channel On Indicators Remote indicators can be used to indicate when a talker s microphone is on Connect t...

Страница 12: ...ect the GATE OUT terminal of each channel to a separate loudspeaker muting relay as shown in Figure 17 Channels 1 3 and 5 shown modified Recommended relays are Omron G6B 1174P US DC12 Potter Brumfield R10 E1Y2 V185 or equivalent available through Digi Key and Newark Electronics NOTE A diode across each relay coil is required to suppress inductive volt age spikes which may damage the SCM810 An exis...

Страница 13: ...ting voltage is changed from the factory setting To change the operating voltage follow these steps 1 Disconnect the SCM810 from the AC power source 2 Remove the eight Phillips head screws securing the top cover 3 Locate Voltage Selector switch SW903 adjacent to power transformer T901 and using a screwdriver turn the center rotor to the 230 V posi tion 4 Locate Fuse F901 and remove it Replace it w...

Страница 14: ...he resistor value to be used for the desired gain Procedure Remove resistor R9230 Install new resistor at jumper X914 Change Limiter Threshold All three threshold settings 16 8 and 4 dBm can be changed To shift the threshold down by 6 dB resistor R will be 82 kΩ To shift the limiter thresholds up by 6 dB R will be 330 kΩ Procedure Remove resistors R9177 and R9180 Install new resistor R at jumper X...

Страница 15: ...p plied the MUTE IN takes precedence over OVERRIDE IN Procedure Short jumper X114 Remove resistor R1046 Dead Zone on MUTE IN Defeat As supplied MUTE IN is intended for use as a momentary cough button or privacy function mute when necessary However if the MUTE IN is in tended to be used so that the talker must unmute microphones to enable speech pickup unmute when needed this modification is needed...

Страница 16: ...l Local Off Attenuation Last Mic Lock on and Automatic Manual DIP Switches If desired these functions can each be remotely controlled with an SPST switch Procedure 1 Solder a wire in the pc board jumper hole adjacent to the desired func tion printed on the printed circuit board These jumpers are located just behind DIP switch SW902 2 Solder a wire in the pc board jumper hole marked GND near switch...

Страница 17: ...ted http www shure com 美国加拿大拉丁美洲加勒比海地区 5800 W Touhy Avenue Niles IL 60714 4608 U S A 电话 847 600 2000 美国传真 847 600 1212 国际传真 847 600 6446 欧洲中东非洲 Shure Europe GmbH 电话 49 7131 72140 传真 49 7131 721414 亚太地区 Shure Asia Limited 电话 852 2893 4290 传真 852 2893 4055 SHURE Incorporated http www shure com 米国カナダ中南米カリブ海諸国 5800 W Touhy Avenue Niles IL 60714 4608 U S A Tel 847 600 2000 米国内 Fax 847 600 1...

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