Specifications

TABLE OF CONTENTS
General ............................................................. 1
Specifications ........................................................ 3
Connections. Controls and Indicators ..................................... 4
.................................................
MicrophonePlacement 6
....................................................
Typical Applications 6
.................................................
ConferenceRoom 6
Church
.......................................................... 6
Courtroom
...................................................... 6
Legislature
....................................................... 6
LogicFunctions ....................................................... 8
CoughButton .................................................... 8
Chairperson-Controlled Muting ....................................... 8
Disabling the Gating Function [Bypass] ................................. 8
.......................................
Remote Channel-On Indication 8
...............................................
LoudspeakerMuting 8
.................................................
"Filibuster"Mode 9
Preventing Room Noise Modulation ................................... 9
...............................................
MicrophoneLock-On 9
Diode Isolation of Logic Controls ...................................... 9
.............................................
External Logic Devices 9
15-VoltCMOS .................................................. 10
Digital Controls or Microcomputers .................................. 1 0
............................................
WirelessMicrophones 10
................................................
Direct Out Gating 10
Controlling Non-AMS Microphones .................................. 11
..................................................... OperatingHints 11
........................................................ Phasing I1
...............................................
MicrophoneMuting 11
...................................................... Grounding 11
Internal Wiring Modifications ........................................... 11
Troubleshooting ..................................................... 15
Appendix I: Effects of Acoustic Environment on Gating ...................... 16
RoomNoise ..................................................... 16
Reverberation
................................................... 16
TalkerDistanceandAngle ......................................... 16
Reflectivesurfaces ............................................... 16
Appendix
II: Theory of the Shure Automatic Microphone System .............. 16
Appendix
Ill: AMS Mixers and Conventional Microphones .................... 1 7
1 WARNING
Voltages in this equipment are hazardous to life . Refer all internal
wiring modifications and servicing to qualified service personnel
.