Australian Monitor. TX8201 User Manual

TX8201

8 Channel Stereo Mixer

with Direct Outputs

Operating Manual

TX8201, 8 Channel Stereo Mixer

Product Description

The TX8201 is a single rack height, 8 channel stereo mixer with direct outputs suitable for desk or 19” rack
mounting. The TX8201 has 6 balanced mic or line inputs and 2 stereo auxiliary inputs. Each input channel
has individual bass, treble and pan controls. The first 6 channels also feature a line level direct output which
can be used to feed additional amplifiers, mixers or recording devices. An internal dip switch allows the
first 6 inputs to be routed to either the direct output, the master outputs or both. The TX8201 also features
in-built VOX muting and a 4 tone generator with Alert, Evacuate, Pre-Announce, Bell tones and Remote
VCA for the Master Volume.

Front Panel Features

Input Level Controls

Mic/Line Gain: The first 6 inputs are labeled Mic/Line 1 to Mic/Line 6 and should be adjusted to provide

the required mix level for each individual channel. Start with the controls set to Level 0 and turn
the controls clockwise until the desired mix level for each channel is reached. Each of the 6 inputs

is equipped with an mic/line dip switch which is located inside the unit (see Internal Adjustments).
Please ensure that this switch is in the correct position for the type of input (mic or line) that you are
connecting to each channel. The input sensitivity when in the mic level position is 1mV (for 1 Volt output).
The input sensitivity when in the line level position is 330mV (for a 1 Volt output)
Stereo Line Gain: The 2 auxiliary input channels are labeled Stereo Line 7 and Stereo Line 8. These
controls should be adjusted to provide the required mix level for each individual auxiliary channel. Start
with the controls set to Level 0 and turn the controls clockwise until the desired mix level for each channel
is reached. The sensitivity of auxiliary inputs 7 and 8 is 180 mV (for a 1 volt output).

Master Left and Right Output

The master Left and Right controls should be adjusted to set the overall mixer level for each output channel
based on the individual levels already set via the input channel gain controls. Start with the output controls
set at approximately the Level 5 position and adjust clockwise for more output level or counter-clockwise
for less output level.

Pan Control

Each input channel has a recessed (screwdriver adjustable) pan control. The pan control determines what
proportion of each input channel will be sent to either of the Left or Right output channels. Setting the pan
control in the centre position will send equal signal levels to both the Left and Right master outputs.
Turning the pan control in a clockwise direction will send progressively more signal to the Right output
channel and less to the Left output channel. Turning the pan control in a counter-clockwise direction will
send progressively more signal to the Left output channel and less to the Right output channel. The pan
control also allows the TX8201 to be used in dual zone applications.

Bass Control

Each input channel has a recessed (screwdriver adjustable) bass tonal adjustment control labeled “Bass”.
Setting this control in the centre position will give a flat bass response. Adjusting the bass control in a
clockwise direction will provide up to 12 dB of bass boost @ 100 Hz. Adjusting the bass control in a
counter-clockwise direction will provide up to 12 dB of bass cut @ 100 Hz.

Treble Control

Each input channel has a recessed (screwdriver adjustable) treble tonal adjustment control labeled
“Treble”. Setting this control in the centre position will give a flat treble response. Adjusting the treble
control in a clockwise direction will provide up to 10 dB of treble boost @ 10KHz. Adjusting the treble
control in a counter-clockwise direction will provide up to 10 dB of treble cut @ 10KHz.

LED Display VU Meter

An 8 segment LED VU meter is provided for each of the master Left and Right outputs. The VU meters
indicate output signal level from -21 to +3 dB. For normal operation the LED’s should rarely oscillate in
the red zone. If the LED’s in the red zone are lit continually, then the output level controls should be turned
counter-clockwise to reduce the output level. Too much output level can cause signal distortion and a
mismatch with the device that the mixer is driving. The far left blue LED on each the VU meters is for
indication that AC power is switched ON to the unit only.

Headphone Output Socket

A 1/4” TRS stereo socket is provided for the connection of monitor headphones. The output level to the
headphones is a nominal 3 volts @ 600 ohms and is connected before the master output level controls.
Adjusting the master output level controls will not effect the headphone output level.

Power Switch & “On” LED

The black rocker switch on the right hand side of the front panel is used to switch the mixer on and off. The
‘up’ position is on. When the amplifier is connected to an appropriate AC power source and is switched on,
the blue on LED’s (located on the left side of both LED displays) will illuminate.

Rear Panel Features

AC Power Inlet

The 3 pin IEC power inlet is located on the left side of the rear panel and accepts a standard mains power
lead fitted with an IEC connector. The operating voltage is 115 VAC @ 60 Hz . The inlet is equipped with
an inbuilt AC fuse holder fitted with a 2 amp slow blow fuse plus one spare. Power consumption is 15 VA.

Please ensure that the mains power cord is disconnected before attempting to check or

replace this fuse.

Tone Generator Terminal Strip

The TX8201 includes a four tone generator module. The tones available include Alert, Evacuate,

Pre-Announce and Bell. The four tones may be activated via a simple contact closure. To activate

a tone, just short out the common terminal with the terminal labeled with the tone that you want to
use. When activated, any of the four tones will mute all inputs except for channels 1 and 2. While the tone
generator function is (as default) set up to be present on both the master outputs and the direct outputs (of
channels 1-6), it can be disabled for all or any of the direct outputs via an internal dip switch (see the
‘Internal Adjustments’ section of this manual for more details). A trim pot (R104), which is located on the
pcb behind the left channel master output, may be adjusted to vary the level of tone generator output.