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18

Assigning DFR

Two DFR blocks are assignable to any channel input or mix output. When using two or 

less microphones, assign the DFR to those channels to prevent feedback from routing to 

the mix bus. Additionally, if a microphone is designated for a chairperson or host, DFR 

should be applied to that channel to ensure that remains stable and does not feed back. 
Apply DFR to a mix bus when using multiple non-stationary microphones or when 

trouble frequencies are feeding back simultaneously in multiple microphone channels.

Filter Types

By default, the DFR processor filters are unlocked to dynamically adjust as feedback 

frequencies are detected. However, you can specify how many of the total number of 

notch filters will remain fixed (locked). Use a greater number of locked (fixed) filters 

on input channels for stationary microphones. In this instance, the room acoustics 

define the dominant feedback frequencies, which do not change appreciably. Use a 

greater number of the dynamic (unlocked) filters on input channels for wireless or hand-

held microphones. In this situation, feedback frequencies change drastically as the 

microphone user wanders the room or sound stage.
Both fixed and dynamic filters will automatically deepen as additional feedback is 

detected.

• Locked (Fixed): Once set, the frequency of a fixed filter will not change until it has 

been cleared or a new frequency manually entered.

• Unlocked (Dynamic): Frequencies are automatically assigned by the DFR as 

feedback is detected. Once a filter is deployed, it remains at that frequency until all 

filters are used. At that time, the DFR redeploys each dynamic filter at the newly 

detected frequency, in the order of oldest dynamic filter to newest.

⑥ ⑦

Filter Width

The DFR offers two width options for notch filters. By default, filters in the DFR are 

deployed as High Q filters. As a high Q filter gets deeper its Q increases up to 101 

(1/70th of an octave). You can also set filters to deploy at Low Q. Low Q filters affect a 

slightly wider range of frequencies by maintaining a Q of 58 (1/40th of an octave) as they 

deepen. To change the setting for an existing filter, select the Q-Width drop-down menu 

in the filter row.

New Filter Q: This setting determines the Q width for new Unlocked (Dynamic) 

frequencies as deployed by DFR.

Содержание SCM820-DAN

Страница 1: ...USER GUIDE 27A20290 Rev 4 2017 Shure Incorporated SCM820 Digital IntelliMix Automatic Mixer...

Страница 2: ...r s instructions 8 DO NOT install near any heat sources such as open flames radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not place any open flame source...

Страница 3: ...de 11 Single or Dual Mixer Operation 11 Networking 12 Network Overview 12 Digital Audio Networking 12 Dante Software by Audinate 14 Dante Controller 14 Dante Virtual Soundcard 14 Application Examples...

Страница 4: ...uting gain across channels to equal one open channel This mode incorporates IntelliMix operating principles into a gain sharing mixing style Extreme Extreme is an aggressive variation of Classic mode...

Страница 5: ...Mix B or both for adjustment with the master knob and monitoring on the LED ring and headphone output Note When both Mix A and Mix B are selected the headphone output only monitors Mix A Mix Status In...

Страница 6: ...nal path See Configuring the Inputs and Outputs for details on direct output routing Chassis Ground Screw 1 8 Provides an optional connection for microphone shield wire to chassis ground IntelliMix Se...

Страница 7: ...B 9 18 24 36 48 60 0 gain limiter L R SUM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE IntelliMix SCM820 AUX IN MASTER lockout power ethernet network audio autom...

Страница 8: ...i i i i i i i i i i i gain low cut hi shelf ch meter iiii i i i i i i i i i i i i i i i i gain low cut hi shelf ch meter iiii i i i i i i i i i i i i i i i i iiii i i i i i i i i i i i i i i i i 320 H...

Страница 9: ...UM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE IntelliMix SCM820 AUX IN MASTER lockout power ethernet network audio automix link dual mixer LIM A B 9 18 24 36 4...

Страница 10: ...ix link dual mixer LIM A B 9 18 24 36 48 60 0 gain limiter L R SUM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE 4 5 OUT L R mix a mix b AUX IN 7 gate IN mute ovr...

Страница 11: ...t the signal by 12 dB at 5 kHz with a slop of 12dB octave Direct and Mix Outputs Assign the Direct Outputs GUI Only Assign the Direct Output for each channel from the Output tab of the GUI Pre EQ Afte...

Страница 12: ...ssic Shure SCM810 automixer in its default settings It is renowned for fast acting seamless channel gating and consistent perceived ambient sound levels The Classic mode excels in most applications sp...

Страница 13: ...er operation by pressing the Dual Mixer button on the back panel or from GUI IntelliMix Tab Example Dual Mixer Applications Set Mix A to Classic mode for sound reinforcement and set Mix B to Smooth fo...

Страница 14: ...rements To network SCM820 mixers ensure the setup meets the following requirements Use shielded Cat5e cables or higher Cable runs limited to 100 m 328 ft Devices are on the same subnet Dante Network I...

Страница 15: ...60 0 gain limiter L R SUM gain low cut hi shelf meter push to solo hold to mute 1 2 3 4 5 6 7 8 A B HEADPHONE IntelliMix SCM820 AUX IN MASTER lockout power ethernet network audio automix link dual mi...

Страница 16: ...ing guidelines Ensure the router has QoS enabled Latency settings are set to at least 1 ms Caution Do not form Link groups on a 100Mbps network as this will cause increased traffic and will exceed the...

Страница 17: ...channels appear at the mixer s Mix Outputs Aux Channel The aux channel can be set to Local or Global from GUI Inputs Tab Local Aux keeps the Aux signal from appearing on the mix output of other networ...

Страница 18: ...the chairperson s microphone activates all other microphones mute automatically Remote Channel Open Indicators Remote indicators can be used to indicate when a talker s microphone is on Connect the LE...

Страница 19: ...nt the system still has insufficient gain before feedback other changes must be made to the sound system such as changing the placement of the microphones and or loudspeakers There are two basic ways...

Страница 20: ...d held microphones In this situation feedback frequencies change drastically as the microphone user wanders the room or sound stage Both fixed and dynamic filters will automatically deepen as addition...

Страница 21: ...s set the device password assign metering type and engage hardware lockout 2 Device List Displays the name of the mixer as set in the Preferences tab Click the drop down bar and select a device to ope...

Страница 22: ...two indicators illuminate green when the channel is open to that mix bus Mix A or Mix B When set to Dual Mixer the A and B indicators function separately for each mix 9 Clip Indicator Illuminates when...

Страница 23: ...Tab 6 Routing Routes the channel to the Mix A or Mix B output The routing options depend on the Mixer Type Single Mixer Type the channel can route to both or neither mixes Dual Mixer Type the channel...

Страница 24: ...enuation Last Mic Lock On and NOMA are disabled in this setting 18 Off Attenuation Sets the amount of attenuation applied to closed channels This is disabled when the Gain Scaling is set to Adaptive 1...

Страница 25: ...lect High Q default or Low Q from the drop down menu High Q 1 70th octave Q 101 Low Q 1 40 octave Q 58 10 New Filter Q This selection designates the width of each new filter as it is deployed by DFR 1...

Страница 26: ...70 octave or 100 99Q to very wide 4 octaves or 0 27 Q Gain Sets boost or cut of the EQ setting from 18 to 18 dB 8 DFR Enable Disable Button When DFR is assigned from the DFR tab an enable disable butt...

Страница 27: ...Auto Link enabled When a device is placed in a group it will automatically configure the unit to the group s settings 3 Stand Alone Devices List Displays all mixers that function independently of a l...

Страница 28: ...der This is post limiter for the mix adjustments 9 IntelliMix Metering Changes the GUI Input meters to display IntelliMix attenuation applied in realtime as displayed with an orange meter Channels tha...

Страница 29: ...rm 3 Select Apply to set the password Once a password is set any user can log on as a Guest to view the GUI without changing settings To clear a password and allow anyone full editing rights 1 Log on...

Страница 30: ...he GUI 4 Language Sets the language of the GUI This setting is saved to the computer s cookies Event Log The event log provides a detailed account of mixer activity from the moment the mixer is powere...

Страница 31: ...that five or less windows are open to the same GUI Disable software meters from GUI Preferences tab See Network section for properly setting up the network Network Audio and Link Groups Problem Indica...

Страница 32: ...Error Messages An error message is generated on the Channel LED rings when operating or environmental conditions occur that could potentially harm the mixer These types of messages indicate the mixer...

Страница 33: ...utput Level Impedance Balanced 150 20 dBV Headphone Output 6 35 mm 1 4 TRS 100 mW 350 dual mono will drive stereo phones Digital Signal Processing AD DA Converter 24 bit 48 kHz 113 dB dynamic range ty...

Страница 34: ...n 5353 udp mDNS Required for device discovery Open 5568 udp SDT Required for inter device communication Open 8023 tcp Telnet Debug console interface Password 8180 tcp Flash Required for web GUI Open 8...

Страница 35: ...tom dual mixer 0dB mic 30dB mic phm 48 VDC CH 46dB reset CHANNEL INTELLIMIX B CC B 0E DD AA 00 auto link gate IN Aux Out mute ovrd gnd L R L 1 14 25 13 R GATE OUT LOGIC GROUND MUTE IN OR OVERRIDE IN 1...

Страница 36: ...ompleks Harco Mangga Dua Blok L No 35 Jakarta Pusat I 16 GSI31 00501 0211 Europe Middle East Africa Shure Europe GmbH Jakob Dieffenbacher Str 12 75031 Eppingen Germany Phone 49 7262 92490 Fax 49 7262...

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