Shure SCM410E manual Dead Zone on Mute in Defeat, Changing Override in to Mute in Filibuster Mode

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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 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 intended to be used so that the talk- er must unmute microphones to enable speech pickup (un- mute when needed), this modification is needed. This re- moves the muted channel from the MaxBus which eliminates ªdead zones.º A dead zone is an area in which a microphone picks up a talker through a muted microphone and other micro- phones do not activate for that talker.

Procedure:

Short jumper X1002.

CHANGING MUTE IN TO INHIBIT

As supplied, a channel will mute when its MUTE IN terminal is grounded. The mute function for each channel can be modified so that a logic ªlowº at the MUTE IN terminal prevents that channel from gating on if it is off, but allows it to remain on if it is already on. Use this modification to enable Filibuster Mode.

IMPORTANT: To prevent high-frequency oscillation, never connect the GATE OUT to the MUTE IN of the same channel unless the ªInhibitº modification has been made.

Procedure:

Short jumper X1007.

CHANGING OVERRIDE IN TO MUTE IN (FILIBUSTER MODE)

This modification should only be performed with the Change MUTE IN to Inhibit modification described above. This is only necessary if the Mute function is desired along with Filibuster Mode.

CHANGING THE OFF-ATTENUATION LEVEL

Procedure:

1.Short jumper X1006.

2.Remove resistors R1087 and R1082.

This procedure changes the off-attenuation level from -13 dB (as supplied). Refer to the following table for attenuation levels and resistor values.

Off-Attenuation Level

Resistor Value

 

 

10 dB

18 kΩ

 

 

13 dB

30 kΩ

(default)

 

 

 

20 dB

75 kΩ

 

 

30 dB

250 kΩ

 

 

￿ dB

open circuit

Procedure:

1.Remove resistor R9178.

2.Install new resistor at jumper points R9177.

NOTE: As more Input channels are added to the system, the off-attenuation increases slightly.

GROUP GATING

With this modification, several channels can be grouped to- gether so that all of them activate whenever one of them acti- vates. This is useful for miking choirs.

Procedure:

1.Locate pad PD1000.

2.Solder a wire from PD1000 to the other channels in the group. For example, to gate channels 1±3 as a group, solder

a wire connecting PD1000, PD2000, and PD3000.

SHORTING OVERRIDE IN TO LOGIC GROUND INTERNALLY

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Contents Four Channel Automatic Microphone Mixer Table of Contents Description FeaturesOperating Principles Front PanelPower On/Off switch on this mixer DIP Switch FunctionsNot affected by MIC/LINE switch Rear PanelSingle Mixer Half Rack Installation InstallationDual Mixer Full Rack Installation Supplied HardwareFixed Mounting TABLE-TOP MountingTop Mount Hanging MountLinking Multiple Mixers SCM410 ConnectionsSCM410 Connections Linked SCM410 and SCM810 MixersLimiter Basic Mixer OperationEqualizer Functions Low Cut Filter High-PassSpecifications Replacement Parts Logic Equivalent Circuit Diagram Logic Connection SpecificationsLogic Connector Advanced FunctionsSuggested Logic Applications Remote Channel-On IndicatorsCough Button Disabling the Gating Function BypassInhibiting Gating for Unwanted Sounds ªFilibusterº ModeLoudspeaker Muting Inhibiting Gating for Unwanted SoundsInhibit Function Remote Volume ControlDiode Isolation of Logic Controls External Logic DevicesInternal Modifications Disabling the Master Level Control Inserting AN Input Line PADChanging the Limiter Threshold Changing Hold TimeDead Zone on Mute in Defeat Changing Override in to Mute in Filibuster ModeChanging the OFF-ATTENUATION Level Group GatingDisabling Automatic Mixing Function by Channel Manual Mode EnableShorting Mute in to Logic Ground Internally
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Manual 17 pages 12.78 Kb

SCM410E, SCM410 specifications

The Shure SCM410 and SCM410E are state-of-the-art automatic microphone mixers designed to enhance audio performance in various professional environments. Known for their reliability and advanced features, these mixers are a popular choice for broadcasters, conferencing systems, and live event productions.

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