Audio Limited TX2040 Bedienungsanleitung
2040 User Guide
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1
CHAPTER
1
TX2040
........................
The TX2040 is a pocket transmitter that provides 32 pre-
programmed frequencies with a switching bandwidth of up
to 24MHz. The transmitter can be switched on and off, even
when it is worn beneath clothing, using the unique Control-X
handset. It is also compatible with the SwitchiR infra-red
controller, and AudiR™ application Palm PDA.
Control-X
........................
The Control-X uses electromagnetic induction to allow the
TX2040 transmitter to be controlled remotely, even through
clothing. At a distance of up to 20cm (8") the Control-X can
switch on and off the transmitter, or check and display
the selected frequency, and it also provides battery check
features.
SwitchiR
........................
The SwitchiR is an infra-red remote control unit the size of
a key fob, which can be used to access all the user-settable
functions of the TX2040 and HX2040. Functions include
transmitter frequency, audio level, battery status, serial
number, and user identification.
HX2040
........................
The HX2040 is a handheld transmitter designed in a classical
conical shape, designed to accept any of 14 condenser
capsules from the Schoeps™ Colette range.
The transmitter has 32 pre-programmed frequencies with
up to 24MHz switching bandwidth, and it includes a unique
infra-red remote control interface for reliable and accessible
control over settings via the SwitchiR or AudiR™ application
for Palm PDAs.
RK2040
........................
The RK2040 is a compact 1U rack capable of
accommodating up to four true diversity receivers. The
RK2040 can be mains powered via an AC/DC adaptor, or can
be powered from any 10-18V DC source. A built-in RS485 PC
interface allows remote monitoring and control via Audio
Ltd’s PC-based monitoring application, Racktop.
Introduction
The 2040 range has been designed as a result of extensive feedback from professional sound specialists and sets a
new benchmark for radio microphone systems, with several unique features and offering benefits to appeal to sound
mixers, directors, and artists.
CHAPTER
2
88
2
Controls, display and connections
........................
Top panel
Antenna
On (green)
Overload (orange)
Infra-red
port
Audio
input socket
On/Reset button
Infra-red port
Receives commands from and transmits status information
back to the SwitchiR 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
provide line-level input.
TX2040 Pocket Transmitter
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 SwitchiR™.
TX2040 Pocket Transmitter
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The following table gives the equivalent settings for the
TX2020:
TX2040 0 1 2 3 4 5 6 7 8 9
TX2020 8 9 0 1 2 3 4 5 6 7
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 RK2040 receiver and 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 off remove the lemo plug. Alternatively
TX2040 Pocket Transmitter
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4
the TX2040 can be turned off or on, even through clothing,
using the Control-X.
The LED flashes green when the battery voltage falls below
6.5V. The unit should not be used when the battery is low as
poor operation may result.
Connecting the audio input
• Connect the microphone or input cable to the six-pin
Lemo socket.
Both positive and negative microphone bias voltages are
provided, enabling the majority of Lavalier microphones to
be used with the TX2040.
Selecting the operating frequency
You can check or change the operating frequency of the
TX2040 via the infra-red control using the SwitchiR.
To check the frequency:
• Press MENU.
The display shows:
FREQUENCY
MHz
Fr
• Align the front of the SwitchiR with the infra-red port on
the TX2040 and press OK.
The display shows the current
frequency; for example:
FREQUENCY
Tx MHz
854.900
To change the frequency:
• Press OK.
The display will alternately flash between showing the
frequency and channel number.
For example:
CHANNEL
01
• Press a or v to scroll through the 32 frequencies read
from the transmitter until the desired frequency or
channel is displayed.
For example:
CHANNEL
32
• Point the SwitchiR at the infra-red port on the TX2040 and
press OK.
If the command was received successfully the display will
show the new set frequency.
For example:
FREQUENCY
Tx MHz
857.950
Otherwise it will show:
Error
• Repeat the above steps if an error message is displayed,
moving the SwitchiR closer to the infra-red port.
Setting the gain
The steps between gain settings 2-9 are approximately 3
to 4dB. Set the gain position so that the Overload indicator
does not flash on during normal operation.
TX2040 Pocket Transmitter
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To check the gain setting:
• Press MENU followed by a.
The display will indicate:
AF LEVEL
TxRx
AF
• Align the front of the SwitchiR with the infra-red port of
the TX2040 and press OK.
The display will show the current
transmitter gain setting:
AF LEVEL
Tx
0
To change the gain setting:
• Press OK again.
The display will flash the level setting.
• Press a or v to step between gain settings 2-9 until the
required gain setting is displayed.
For example:
AF LEVEL
Tx
9
• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
If the command was received correctly the display will show
the new gain setting.
For example:
AF LEVEL
Tx
9
Otherwise the display shows:
Error
• Repeat the previous steps if an error message is
displayed, moving the SwitchiR closer to the infra-red
port.
Setting the low frequency cut filter
The LF cut filter gives an approximately 6dB cut at 50Hz to
reduce handling and wind noise.
To check the status of the low frequency cut filter:
• Press MENU.
• Press a twice until the
display shows:
Tx
LF Cut
• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
The current LF cut filter setting
is displayed; for example:
Tx
OFF
To change the filter setting:
• Press OK again.
The current setting will flash.
• Press a or v to toggle between ON or OFF until the
required setting is displayed.
• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
TX2040 Pocket Transmitter
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If the command was received successfully the new setting
will be displayed.
For example:
Tx
On
Otherwise the display will show:
Error
• Repeat the previous steps if an error message is
displayed, moving the SwitchiR closer to the infra-red
port.
Checking the battery status
• Press MENU.
• Press a three times until
the display shows:
TxRx
BAtt
• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
The display will show the
current battery status:
Rx
9.0 v
The battery level can also be checked from the receiver; see
the appropriate instructions for the receiver.
Infra-red disable
........................
You can protect the TX2040 from an accidental change
of settings, such as in a live performance, by disabling
the infra-red port on the transmitter. This will prevent all
communication with the transmitter until the brown reset
button is pressed, or the battery is disconnected and
reconnected via the microphone plug.
Disabling the infra-red port
• Press MENU.
• Press v twice.
The display
will show:
TxRx
dISABLE
TxRx
Ir ?
• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
If the command was received
successfully the display will show:
Tx
Ir OFF
Note: Once the infra-red port has been disabled, any
subsequent interrogation of the transmitter will give an error
display; this is not a fault.
Sleep mode
........................
The TX2040 can be put into sleep mode using the SwitchiR.
In the sleep mode the TX2040 uses very little current and the
SwitchiR can still be used to read all settings.
When not in use the power should be switched off by
removing the microphone plug or input cable.
Putting the TX2040 into sleep mode
• Press MENU followed by v.
The display will indicate:
Tx
OFF
TX2040 Pocket Transmitter
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• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
The display will show:
tr oFF
To switch the transmitter on again:
• Press MENU.
The display shows:
FREQUENCY
MHz
Fr
• Align the front of the SwitchiR with the infra-red port on
the transmitter and press OK.
The display shows the current
frequency; for example:
FREQUENCY
Tx MHz
857.950
Alternatively, you can use the tip of the antenna to press the
brown On/Reset button to turn the TX2040 on again.
Technical specification
........................
Frequency range 470MHz–1000MHz
Frequency stability Better than ETS 300–422
Number of frequencies 32 pre-programmed
Switching bandwidth Up to 24MHz
Output power 50mW nominal
Gain control range 28dB in 8 steps, plus 2 steps for
600Ω line input
Maximum input level +8dB gain position 0, 600Ω
Frequency response 50Hz to 18kHz ±1dB
THD <0.1% at working levels
<0.3% at gain position 7 with
-6dB input in overload
Battery 9V (IEC 6LR61) Alkaline
Battery life Typically 10 hours
Size 89 x 60 x 21mm
Weight 135g
Operating temperature
range
-20°C to +55°C
Compliant to R&TTE Directive FCC
0891
CHAPTER
3
88
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Controls, display, and connections
........................
Lemo connector
Allows you to plug in a TX2040, TX2020, or DX2020 and
measure its on-load internal battery voltage.
Battery contacts
Allow you to measure the voltage of a 9V 6LR61 type battery.
Red off indicator
Indicates no signal from the transmitter.
Green on indicator
Indicates a signal received from the transmitter.
Display
Shows the status of the Control-X, and displays frequency
and voltage.
ON/OFF buttons
For turning the pocket transmitter on or off.
Battery compartment
Takes a 9V 6LR61 type battery.
Controlling a TX2040
........................
Switching on
To switch the TX2040 on, even through clothing:
• Hold the Control-X within 20cm (8") of the TX2040.
• Press and hold the ON button and slowly wave the
Control-X in front of the transmitter.
The green indicator illuminates
and the display shows:
tr On
• Release the ON button.
The green indicator stays illuminated if a signal is being
received from the transmitter, and the display shows the
frequency.
Control-X Transmitter Controller
The Control-X uses electromagnetic induction to switch on or off the TX2040 transmitter, or check its frequency, even
when the transmitter is hidden beneath clothing. It has a built-in frequency counter and battery tester.
Control-X Transmitter Controller
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9
For example:
MHz
856.575
FREQUENCY
Switching off
• Hold the Control-X within 20cm (8") of the TX2040.
• Press the OFF button.
The red indicator illuminates
and the display shows:
tr OFF
• Release the OFF button.
The red indicator stays illuminated
and the display then shows:
no SIG
This confirms that the TX2040 has been switched off.
Checking whether the TX2040 is switched on
You can use the Control-X to check the status of the TX2040,
without switching it on or off, as follows:
• Hold the Control-X more than 20cm (8") away from the
TX2040, and press and release the ON button.
• Move the Control-X within 20cm (8") of the TX2040.
If the TX2040 is operating the green indicator will be
illuminated and the display shows the frequency.
For example:
MHz
856.575
FREQUENCY
If the TX2040 is not operating the red indicator will be
illuminated.
The display shows:
no SIG
Displaying the frequency of any
transmitter
........................
The Control-X can be used to display the frequency of any
Audio Ltd or third-party transmitter.
Displaying transmitter frequency
• Bring the transmitter within 5cm (2”) of the Control-X.
• Hold down the ON button.
The display shows the transmitter
frequency; for example:
MHz
856.575
FREQUENCY
Checking battery voltages
........................
Checking the Control-X battery
• Press the ON and OFF buttons simultaneously, and
release them.
The display briefly shows the battery
voltage of the Control-X; for example:
7.60u
If this falls below 6V the battery should be replaced.
Note that the Control-X automatically switches itself off if no
key has been pressed for approximately 12 seconds.
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