Mode Switches - Arcam HDA PA720 Handbook [Page 12]

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Operation

Switching On

The POWER button switches the unit on and off. The status indicator LED indicates the state of the amplifier: it changes from red to orange then white if mains power is connected and the unit is switched on. Pressing the STBY button while the unit is powered on, will place the PA720, PA240 or PA410 into standby mode. Press the STBY button again to bring the unit out of standby. Automatic Standby In order to comply with international regulations for consumer products, this unit is designed to enter standby mode if no user interaction and no audio input signal are detected for an extended period of time (default is 20 minutes). The unit can be brought out of standby by pressing the STBY button on the front panel, the trigger input or RS232 or ethernet command (if enabled, see "Network and RS322 in Standby" for more information) The standby time out can be adjusted using either RS232 or IP control commands. Please refer to the PA720 / PA240 / PA410 RS232/IP control document, available for download from www.arcam.co.uk. Alternatively pressing and holding the MUTE button will toggle the standby time out between OFF and 20 minutes. The LED will flash to indicate the setting change, red for OFF, green for 20 minutes. Note: if the standby time-out is set to OFF, the automatic standby feature will be disabled. Network and RS322 in Standby In low power standby mode the network and RS322 functionality is disabled. To enable network and RS232 in standby, send a control or status request command to the unit whilst it is powered on. This will enable whichever control method was used when the unit is in standby. Note: To indicate the unit is not in lowest power standby mode the LED will flash briefly when entering standby mode. Note: Enabling network or RS232 control will increase standby power consumption. To restore the unit to the default low power standby consumption press and hold the STBY button for more than 3 seconds or restore the unit to factory defaults. Muting the Output The speaker outputs of the PA720, PA240 or PA410 can be silenced by pressing the MUTE button on either the front panel or by sending the relevent command via either the RS232 or network connection. If the unit is muted, front panel power indicator will change to orange. To cancel the mute, press the MUTE button again or send the relevent command via either the RS232 or network connection. EN-12

Mode switches

The various mode switches located on the rear of the PA720 and PA240 amplifiers allow you to configure your power amplifier to your specific equipment setup. See "Connecting Sources and Loudspeakers" on page EN-13 for more information. INPUT (PA720 and PA240 only) This switch selects between the XLR and RCA phono inputs of the amplifier. Select which ever connection method you are using to connect your preamp. GAIN(PA240 only) This switch allows the gain to be changed from standard Arcam gain of 31dB (which matches all Arcam amplifiers and receivers) to 26dB. This allows flexibility to connect multiple PA240 amplifiers in different modes to multiple speakers. In normal set-ups this switch should be left at 31dB. MODE (PA240 only) This switch selects between the different amplification modes of the PA240. STEREO (ST) This is the standard stereo amplification mode using two separate preamp inputs driving two separate speaker outputs. DUAL MONO (DM) This mode allows two separate speakers to be driven from a single preamp input. Alternatively the two drivers of a single speaker can be bi-amped from a single PA240. BRIDGED MONO (BRIDGE) This mode uses both channels of the PA240 to drive a single speaker. This the ultimate in high power, high fidelity amplification. Table of Contents Previous Page Next Page

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