JBL CSMA 180 Operation Manual

Also see for CSMA 1120: Application guide

Contents

JBL CSMA 180 Operation Manual Manual pdf 23 page image

233.6 Priority MutingWith CSMA180 and CSMA1120 Input Channel 1 may be used as a priority channel,muting all other channels when pins 4 and 5 are shorted using a switch closure. Ifthe amplifier has entered sleep mode due to inactivity, invoking priority will also bringthe unit out of sleep and ready for transmitting an announcement.The CSMA240, CSMA280 and CSMA2120 lets Input Ch1 operate with priority over allinputs into Amp 1. Ch1 will have priority over both Amp 1 and Amp 2 if the routingDIP switch #1 is set to ON. Ch5, however, cannot have priority over the Amp1 inputs.3.7 Remote Volume ControlRemote volume control can be implemented using a CSR-V controller connectedvia an ethernet cable to the RJ45 connector on the back panel. For the CSMA240,CSMA280 and CSMA2120, there are two connectors, one for each amplifier output.3.8 Sleep ModeTo save energy, the unit is designed to go into sleep mode after approximately 30minutes operating with no signal at any of the inputs. Return of signal (-40dBu or7.75mVRMS) to any input will wake the unit from its slumber. Also, a switch closureacross the priority input pins will return the unit to normal operating mode.3.9 AUX OutputAn auxiliary output is available that you may connect to additional amplifiers. Theaudio signal is the mix of the input channels. Note that the master volume controland tone controls will have no effect on the aux output signal.