Using The Aux Input - Azden PRO-XR Instruction Manual

Setting Optimal Recording Levels On Camera
If you are able to set the microphone recording level on your camera, it is generally best to keep the camera's
gain level low and set the output level of the receiver to the maximum. This is because the preamps in most
cameras tend to be of low quality and will add noise to the recording if a lot of gain is used. The output of the
PRO-XR was designed to provide a strong audio signal to a camera so that gain levels on the camera's
microphone input should not have to be turned up very high.
Follow these steps for optimal recording levels on a camera:
(This guide assumes your camera has an adjustable microphone gain setting and a digital audio meter display)
1. Turn on the system and ensure that the units are paired, the lapel microphone is properly plugged into the
transmitter and the receiver is properly connected to the camera's microphone input.
2. Find the microphone gain settings on your camera. Set the microphone gain to manual mode if necessary
(turn off auto mode). Start by setting the camera's input gain level to the minimum setting.
3. Speak into the microphone to test levels and observe the audio meters. Ideally the audio level should peak
at about 75% of the max output level. This leaves room for error to avoid distortion.
a. If the audio level is peaking below the 75% of the max output mark, increase the output gain on the
PRO-XR receiver by pressing the plus (+) button until the level is satisfactory. If the maximum is reached,
and levels are still not high enough, increase the input gain on the camera until the level is satisfactory.
b. If the audio level is peaking well above the 75% of the max output mark, or distorting, reduce the output
gain on the PRO-XR receiver by pressing the negative (-) button. If further gain reduction is necessary,
you can always move the lapel mic further away from the subject's mouth or ask them to speak more
softly.

Using The Aux Input

A unique feature on the PRO-XRT transmitter is the inclusion of an auxiliary input (marked AUX). This input is
intended for a line level signal and will not work with microphones (to use a microphone, plug it into the
transmitter's MIC IN). To use the AUX Input, push the Input Selector switch to the side with the letters "AUX IN" or
in the center to mix it with the Mic Input.
There are myriad uses for the Aux Input. One possibility is it can be used to connect the output of a multi-channel
mixer, thereby allowing you to wirelessly send a mix of 2 or more microphones to the receiver. Another is to
connect the line output of a digital recorder to wirelessly send the audio signal to a camera, giving you a backup
recording in case of any interference.
Additional cables and adapters (not included with this system) may be required in order to connect line level
equipment. It is important to note that the AUX input will accept a stereo signal but that signal is summed to mono
in transmission to the receiver.
Internal Battery and Charging
The transmitter and receiver each have an internal lithium-ion rechargeable battery inside. Both units charge via
the mini-USB port located at the bottom. The included USB dual-charging cable splits into two mini-USB plugs to
allow for charging of the RX and TX units simultaneously. While these mini-USB plugs are different colors (red,
black) it does not matter which you use to charge the units. Use the included A/C adapter to allow for charging
from a power outlet. Alternatively, the USB charging cable can be connected to a computer or power bank for
charging.
While each unit is charging, the Power Indicator light will blink GREEN. This light will turn off to let you know
charging is complete.
The total full charge time for either unit is approximately 2.5 hours. The max run time from a full battery on the
transmitter is approximately 14 hours (less at 50 or 100 mW outputs), while for the receiver it is approximately 20
hours. It is also possible to operate the receiver and transmitter while being charged.
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