Operating Instructions; Audio Control - Phonak TX-300V User Manual

tx-300v studio manual_2006_01_20.qxp
TX-300V Operating Instructions
Power Unit On
Turn power on by pressing the power button.
Select a Channel
Select the transmit channel by pressing the channel
select UP and DOWN buttons.
Lock on Channel
Once you determine your transmit channel, you can
lock the transmitter on that channel. To lock a
channel hold the Channel
Select "Up" button for 3
seconds until the padlock icon
appears on the display. To
unlock, repeat this process and the padlock icon will
disappear.
Test Tone (if necessary)
To broadcast a test tone, press the test tone button.
This helps to test receivers
when no audio source is
available.
2/1/2006 12:03 PM
TX-300V Audio Control
Channel Select
UP and DOWN buttons
Press Test Tone
button here
Page 9
Adjust Audio Input Level
Adjust the input knob counterclockwise to add gain to
Input 1. This will decrease gain to Input 2. Adjust
input knob clockwise to add gain to Input 2. This will
decrease gain to Input 1. If you have two audio
sources connected to both Input 1 and 2, adjust the
level of one input using the VU meter, then adjust the
output level of the other audio source. Adjust the
input level until the left VU meter(s) occasionally
illuminate the red LEDs. Illumination of the red LEDs
indicates the unit is in limiting. Limiting is required
so that the unit does not over-modulate the
transmitter. If you don't want any audio limiting to
occur, make sure the red LEDs never illuminate. If you
want a highly limited
signal, turn the audio gain
up so the red LEDs
illuminate often.
Adjust Contour
Adjust the Contour knob counterclockwise if your
audio source is mostly
voice. Adjust the knob
clockwise if your audio
source is mostly music.
The Contour knob adjusts
the relative equalization
of the unit. This
equalization boosts or cuts frequencies above 5 kHz.
Adjust Mix Level
Adjust the mix level
until the right VU
meter occasionally
illuminates the red
LED. This is the level adjustment for the combined
output from Input 1 and Input 2.
Process Mode
Process mode is used for Audio Gain Control (AGC).
With the process mode enabled, the TX-300V will
automatically adjust for inconsistent signal input levels
by raising or lowering the signal level accordingly to
provide a consistent sound output level. This feature
should be used in applications where a consistent
sound level is important and the input levels vary
substantially. Typically you would not want to engage
the Process Mode when a speaker's emphasis is critical
to the message they are conveying.
9