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A digital audio expander can pass audio into or out of the system. Typical applications are room connectivity and audio distribution. Basic functions, automatic gain control, the venue for language and simultaneous interpretation language channel audio input channel, the venue for language and simultaneous interpretation channel audio output channel (16 than 44.1 kHz), simultaneous interpretation on the language and language channel can be flexible voice distribution, through the display screen and a single knob to configure the digital audio expander, installation personnel for each digital audio expander assign a unique name to identify, through the VU meter readings to monitor the audio input and audio output. Can make use headphones for listening, applicable to the desktop or 19-inch rack-mount (2 u), the handle of the chassis, convenient carrying through the optical fiber network power supply control and indicator light, 2 lines 16 characters LCD display, is used to display audio expander state and configuration, knobs, used to browse, interconnected components front panel LCD menu stereo jack headphone output all the way back after 3.5 mm (0.14 inch), two optical fiber network connection, Used to connect to CCU, two XLR AES / 3 needle the EBU stereo input port, for the two audio channels, two lotus SPDIF stereo input port, for the two audio channels, two XLR AES / 3 needle the EBU stereo output port, is used to output two audio channels, the two lotus SPDIF stereo output port, to control the output audio channel 2, 8 contact input port, For enabling audio input and audio output ? 5 control relay output ports, Used to indicate the channel occupancy status certificate and approval to the European CE certification - 4 dex4 digital audio accessories parts number 1 PRS expander for 19 inch rack-mount stent suite 1 leg suite 1 connector suite specification index of electric power supply voltage 24 to 48 VDC power 6 W frequency response 30 Hz - 20 kHz THD < 0.5% of the rated electricity at ordinary times installed mechanical index using desktop or in the 19 inch rack size (high x Wide x thick) desktop installation, including a foot 92 x 440 x 400 mm (3.6 x 17.3 x 15.7 inches) 19-inch cabinet installation, Containing stents, 88 x 88 x 483 mm (3.5 x 19 x 15.7 inches) behind stents 40 mm (1.6 inch) in front of the 360 mm (14.2 inch) weight 6 kg (13.2 lb) 10736 (PH) and silver grey color carbon order information PRS ? 4 dex4 digital audio digital audio expander expander external audio into the system and will be handed out the audio from the system. Order number dex4 PRS - 4