Audio Resource Group, Inc. • 405 Main Ave W, Unit 4G • West Fargo, ND 58078 • ©2015 Audio Resource Group, Inc.
All Rights Reserved • www.argaudio.com
Page 5
Operating Instructions: ARG-TX900 Transmitter
1.
Before installing batteries, determine if they are carbon zinc, heavy duty, alkaline or rechargeable.
Open the battery compartment door and locate the “ALK/NiMH” switch. If using carbon zinc, heavy
duty or alkaline batteries slide the switch to the “ALK” position; if using NiMH rechargeable batteries;
slide the switch to the “NiMH” position.
2.
Install (2) AA style batteries by pressing them into place, observing the proper battery polarity.
Incorrect insertion may cause both mechanical and electrical damage not covered by the limited
lifetime warranty. Units will not work if the batteries are incorrectly installed.
3.
Plug the microphone into the 3.5mm audio input jack located on the left side of the transmitter
housing. Do not bunch up the cord, wrap it tightly around your body or wrap it around the transmitter.
Use only Talk & Listen® approved microphones; substitutions can greatly affect the overall
performance therefore causing poor audio quality.
4.
Turn the power switch on top of the Transmitter to “ON”. The LCD backlight will turn on and remain
on until the power is turned off. The LED will turn orange indicating the power is on; red flashing
indicates the battery is charging and solid red indicates the batteries are fully charged.
5.
Confirm that the channel number on the transmitter matches the number on the receiver(s). To adjust
the channel number, open the battery compartment door and locate the “LOCK” button; press and
hold it for three seconds to unlock the transmitter. The “LOCK” icon on the LCD display will disappear
once the unit is unlocked. Use the “-“button on the front panel to scroll through the channels and
choose the appropriate channel. When
completed, press and hold the “LOCK” button for three
seconds to relock the tra
nsmitter, the “LOCK” icon will reappear on the display. Close the battery
compartment door. The channel numbers range from 1-12 and are located on the left side of the LCD
display.
6.
To temporarily silence the transmitter during use, press and hold the
“-” button until the “signal
strength meter” on the LCD display disappears: this indicates the audio has been muted. Repeat the
process to restore the audio signal and the “signal strength meter” on the LCD display reappears.
7.
Low Pass Filter:
To adjust, open
the battery compartment door and locate the “LOCK” button, press
and hold it for three seconds to unlock the transmitter. The “LOCK” icon on the LCD display will
disappear once the unit is unlocked; locate the “+” button under the LCD display and press to adjust
the low pass filter setting. When completed, press and hold the “LOCK” button for three seconds to
relock the transmitter, the “LOCK” icon will reappear on the display, close the battery compartment
door. The low pass filter settings range from 1-8; increasing the filter setting decreases unwanted
high frequencies while maintaining an acceptable audio range. The display number will go blank after
you scroll past “8” which indicates the low pass filter is turned completely off. The number located on
the right side of the LCD display is the low pass filter setting. The factory setting is
“2”.
8.
RF Level Adjustment:
To adjust, make sure the transmitter is turned off; open the battery door,
press and hold the “SET” button and simultaneously turn the transmitter ON to enter into the RF Level
Programming mode. To adjust this setting use the “+” and “-“ buttons to cycle through the settings.
There are 4 individual RF level settings. The signal meter icon on the LCD display is used to indicate
the current programmed RF level. Settings are +3dBm (1 signal bar); +6dBm (2 signal bars); +9dBm
(3 signal bars); and +13dBm (4 signal bars-
the highest RF Level Setting). Press the “SET” button to
scroll through and select the RF level setting. When finished, close the battery door and turn the
transmitter OFF to exit programming mode. The factory setting is 4 signal bars; the highest setting.
9. When finished using Transmitter, make sure to power off.
