Operating Instructions: ARG-TX900 Transmitter
Audio Resource Group, Inc.
440 Ramsland Ave
Hannaford, ND 58448
888.468.4552
www.argaudio.com
Page 6
Audio Resource Group: 900MHz Talk & Listen
®
Systems Master Manual OM-027
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 Receiver 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 low battery and
solid red indicates the battery is charging.
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 transmitter, 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. When using the line input for auxiliary equipment (such as CD player or iPOD™), turn the “Gain Control” off.
8.
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”.
9.
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. 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.
10. When finished using Transmitter, make sure to power off.