Antex electronic DMX-4 user manual USB Connection, Input Connections, Monitor Connections

DMX-4 USB Mixer User Manual

USB Connection

•The USB specification limits the length of the USB cable to 5 meters (about 16 feet), therefore the DMX-4 should be placed near the computer. The cable supplied is 6 feet long.

•The USB port on the computer must be USB 2.0 or higher (“high speed”). The device will not work on USB 1.1.

•Plug directly into one of the computer’s USB ports. Do not go through a hub.

•Note that the USB cable plugs into the DMX-4 with the beveled side (and the molded USB logo) facing down.

Input Connections

•Dynamic or electret condenser microphones can be used with the DMX-4. Dynamic microphones generally have lower output levels and require the input gain sliders to be set higher. Electret condenser microphones require phantom power, which can be turned on in the Antex Mixer Program. Electret condenser microphones generally require a minimum of 9 to 12 volts for phantom power. Condenser microphones that require 48 volts will not work with the DMX-4.

•The DMX-4 inputs are balanced, which provides better noise and hum rejection. However, we recommend not running the microphone cables near computers, monitors, transformers or other equipment which may cause humming or buzzing in the audio. Balanced connections may be run long distances.

•Line level devices, such as video conferencing systems or telephone line interfaces may be

DMX-4 USB Mixer User Manual

connected to the DMX-4. Note that inputs 1 and 2 do not have gain adjustments in Line setting, the gain is fixed at 0dB. If the line level device has an output level control, this can be used to adjust the recording level. If the device does not have an output level control, then it would be better to connect it to inputs 3 or 4, which do have gain adjustment in Line setting.

•To connect unbalanced (single ended) devices, use an appropriate cable, such as XLR male to RCA male. These cables connect pins 1 and 3 of the XLR together, which grounds one of the 2 balanced inputs. We recommend keeping unbalanced connections to about 6 feet maximum.

Monitor Connections

•The monitor outputs are unbalanced (single ended) line level (2VRMS max). They are intended to connect to telephone line interfaces, video conferencing systems, or PA amplifiers.

•The loudness level of the monitor output can be adjusted with the slider control in the Antex Mixer Program.

•Use caution when connecting this or any other device to the public telephone network. Do not put too loud a signal level into the phone line.

This could damage telephone equipment and/or be painfully loud to the person on the other end of the phone line.

•Any combination of the 4 inputs may be independently routed to the monitor outputs using the Antex Mixer Program. When connecting someone by phone, the caller would

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