Shure SCM410 Manual page 20

Shure Incorporated
FIGURE 7: CHAIRPERSON-CONTROLLED MUTING
Remote Channel-On Indicators
Remote indicators can be used to indicate when a talker's microphone is on. Connect the LEDs and a 5-volt sup-
ply to the GATE OUT pins (See Figure 8). To avoid switching clicks in the audio output, do not ground the power
supply negative terminal in the audio system or rack ground.
Important: If a single cable is used for the microphone audio signal and the LED dc power, separate shielded
pairs must be used. Failure to carry the dc power on a shielded pair may result in audible clicking due to capacitive
coupling between the dc power lines and microphone lines.
FIGURE 8: REMOTE CHANNEL-ON INDICATORS
Disabling the Gating Function (Bypass)
To keep certain microphones on at all times, wire the desired microphone channel's OVERRIDE IN pins together
to the Logic Ground pin. The selected channels now function as they would in a non-automatic mixer (see Figure
9). To perform this modification internally on the mixer, refer to the Shorting Override In to Logic Ground Internally
paragraph in the Internal Modifications Addendum.
20/25