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

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.

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.

Procedure:

1.Remove resistor R9178.

2.Install new resistor at jumper points R9177.

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.