Audio TX2040 User Manual

User Guide
The TX2040 is a small, lightweight battery-powered pocket transmitter for use with a wide range of
lapel microphones. All settings can be read and changed via the infra-red port using the Switch iR ™.
Controls, display
and connections
Infra-red port
Receives commands from and transmits status information
back to the Switch iR infra-red controller.
On/Overload indicator
The LED glows green while the TX2040 is switched on, but
will flash orange to indicate an overload in the presence of
a high-level audio signal. At this point the low distortion
limiter operates.
Brown reset button
Resets the TX2040 and turns it on again from sleep mode.
Please use the tip of the antenna to press the button.
Battery compartment
Holds a 6LR61 type 9V alkaline battery.
Audio input
Allows a microphone or input cable to be connected.
SMA antenna connector
SMA socket to which the antenna is connected.
LF cut using SwitchiR
Gives approximately 6dB LF cut at 50Hz, to assist in the
reduction of wind noise.
Gain setting using the SwitchiR
Provides eight gain options when used with standard
microphones. Position 9 gives maximum gain and each
position decreases the gain by approximately 3 to 4dB,
giving a total of 30dB of adjustment. Positions 1 and 0
TX2040 transmitter
provide line-level input.
The following table gives the equivalent settings for the
TX2020:
TX2040 0 1 2
TX2020 8 9 0
Note: Positions 0 and 1 (8 and 9 on the TX2020) provide
line-level input.

Setting up the TX2040

To set up the TX2040:
Fit the battery.
Connect the antenna.
Switch on by plugging in the microphone or input cable.
Check or select the operating frequency.
Check that the receiver's no signal indicator is not
illuminated.
Check or set the microphone gain.
Check or set the low frequency cut filter.
Check the battery status.
These steps are explained below:

Fitting the battery

Press and slide open the battery
compartment door.
Insert a 6LR61 type 9V alkaline battery
with its contacts facing downwards
observing the polarity as shown on
the sleeve.
Push the battery down against the
spring-loaded contacts and slide the
battery compartment door closed,
pushing against the spring-loaded
contacts.
Do not use excessive force: An
electronic resettable fuse protects the
transmitter from reverse powering.
A low transmitter battery indicator
is provided on the DX2040 receiver
and on the RK2040 rack in addition
to the LED indicator on the TX2040
transmitter.

Connecting the antenna

Connect the flexible antenna to the SMA connector.

Switching on

Insert the microphone plug. The LED illuminates green
and the transmitter turns on. To turn the transmitter
3 4 5 6 7 8 9
1 2 3 4 5 6 7
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