104.5. Micro switches on the rear panel• REMOTE: Turn on (ON) the remote control from the WPmVOL or WPmVOL-SR wall panelconnected to the REMOTE port.• NOISE GATE: Turn on (ON) or turn off the noise gate function for the LINE3/MIC input. Whenthis function is active the microphone input is muted whilst there is no signal above the functionactivation threshold, so the equipment rejects background noise captured by the microphoneconnected to it.• TALKOVER: On or off according to the priority of the LINE3/MIC input over the line inputs(LINE1 or LINE2). When the TALKOVER function is on, the LINE3/MIC signal will attenuatethe selected line (LINE 1 or 2) when the activation threshold set is reached.• AUTO STANDBY: Switch the AUTO STANDBY function on (ON) or off. When the function ison, the CA120HZ will automatically go into STANDBY or low consumption mode in theabsence of audio signals in its inputs.• LINE3/MIC: input selection between LINE and MIC3 (line level input from RCA connectors ormicrophone level input from Euroblock connector)• HPF: frequency selection (50 or 70 Hz) for the unit's high-pass filter4.6. Lock modeTo switch the CA120HZ lock mode on or off hold in the VOL/MUTE control for 10 seconds from theVOL/MUTE mode. The LED SETTING indicators will flash 3 times to indicate that lock mode is now on.When in lock mode the device cannot be managed using the VOL/MUTE control (it will flash three times toshow that it is in that mode when you turn the knob). This will protect the equipment from unwantedhandling until it is restored to normal operation after holding the VOL/MUTE control in for a further 10seconds (the LED SETTING indicators will flash twice to show that the lock mode is off).Note: once lock mode is activated it will stay activated even when the equipment is turned off andon again. It will stay in lock mode until the VOL/MUTE control is held in for 10 seconds again.4.7. Restore default settings and update firmwareIf you would like to restore the CA120HZ to factory settings, follow this procedure:1. Unplug the equipment then press and hold the knob in.2. Plug back the unit without releasing the knob. The MUTE LED indicator will flash.3. Wait a few seconds and then switch the CA120HZ off again.4. The next time you turn it on, the factory settings will be in the memory.Note: for instructions on how to update the unit's firmware, see the product web page at www.ecler.com,where you will find the update software utility and instructions on how to proceed.