8
System Operation
Placement:
Location
For best operation, place the transmitter near the performance location.
The transmitter should be at least 1 meter (3 feet) from the receiver.
Keep antennas away from noise sources such as digital equipment,
motors, automobiles and neon lights, as well as away from large metal
objects. Audio-Technica recommends that you do not locate the M2T
Stereo Transmitter in the same rack with a wireless microphone receiver.
System set-up:
1. Plug in the included AC adapter and connect to transmitter’s DC
input.
2. Insert two AA batteries in the receiver, observing polarity as indicated.
3. Set the receiver and transmitter to the same frequency group and
frequency channel. (
See below.
) Note: Do not set more than
one transmitter to the same frequency. Multiple receivers
may be set to the same frequency.
4. Power on your receiver (without earphones) with volume in
minimum position. Note: At this point, check to be certain the
RF indictor is not illuminated. If it is illuminated before you
have powered on the transmitter, this means the frequency
you have chosen is already in use. Choose another frequency.
5. Power on the transmitter.
6. Check the RF LED on your receiver to be certain it is illuminated.
(This indicates that it is receiving a signal from the transmitter.)
7. Power off both units (transmitter and receiver).
Audio set-up:
8. Connect audio source(s) to inputs on the rear panel of the
transmitter. There are two combination audio inputs on the back
panel; each offers both XLR and 1/4" inputs. Use shielded audio
cable for the connection between the transmitter and the audio
source (mixer or instrument). Note: If you want to send the
audio signal through your transmitter (to another transmitter
or recording device, for instance), use the Loop output connectors
on the back of the M2T Stereo Transmitter. The R/2 XLR jack
duplicates the unprocessed signal of the R/2 input; the L/1 XLR
jack duplicates the unprocessed signal of the L/1 input. These
are not affected by front panel settings.
9. Turn on the transmitter.
10. Set the attenuator on rear panel of transmitter to appropriate level.
If Input Level LEDs are consistently red or orange, set the attenuator
to -10 or -20 dB or turn the trim down for corresponding audio input.
11. Trim levels are set at the factory to the maximum position; adjust if
necessary. (
See below.
)
12. Plug earphones into jack on receiver. Turn the locking ring
clockwise until tight. NOTE: Do not put the earphones in your
ears at this point.
13. Turn on receiver with volume in minimum position.
14. With volume on receiver at minimum position, put earphones into
your ears and gradually increase volume until appropriate level is
reached.
How to select a frequency
1. Select a frequency group (A-J) via the Frequency Group Selector on
the front panel of the M2T Stereo Transmitter.
2. Next, select a channel (1-10) via the Frequency Channel Selector on
the front panel of the M2T Stereo Transmitter.
3. Before turning on your receiver, use the provided screwdriver to set
the receiver channel selector switches (
see page 6
) to the same
frequency group and channel you have selected on the transmitter.
Select frequency groups A-J and channels 1-10. The transmitter
may be either on or off when changing channels (frequencies).
Each transmitter/receiver system operates on a choice of 100 switch-
selected frequencies per band (10 frequencies in 10 frequency groups).
Available frequencies are shown in the chart on page 13. When using
multiple transmitters, always use the same frequency group.
M2 “L” Band transmitters must be used only with “L” Band receivers;
the same holds true for all the frequency bands (i.e., always use
receivers and transmitters that operate in the same band). The Band
marking will be found on the antenna of both the M2T Stereo Transmit-
ter and M2R Stereo Receiver.
Note: Because these frequencies are shared with TV broadcasting
(depending on country of use), frequency selection is largely
dependent upon which TV broadcast channels are in operation
where the wireless system is to be used.
Squelch Control
The squelch control is preset at the factory, but can be adjusted if you
must use the system in a high RF interference area. If there is audio
output from the receiver when your transmitter is off, adjust the
squelch control so the system will receive the signal from your
transmitter but “squelch” or eliminate the unwanted background RF
noise. This adjustment can cause a reduction in useable range of the
wireless transmitter, so set the control to the lowest position which
reliably mutes the unwanted RF signals.
Setting Levels
Correct adjustment of transmitter audio input is important for optimum
system performance.
The M2T Stereo Transmitter trim (volume) controls (
See L/1 and R/2
trim control
, page 5) have factory pre-set audio input levels. Factory
setting is full clockwise, no attenuation. With a source plugged into the
transmitter (at typical levels, check the AF peak indicator on the
transmitter. If the AF peak indicator is red, it may be necessary to
adjust the transmitter trim control counter-clockwise until the AF peak
indicator is illuminated only on audio peaks. No further transmitter trim
adjustments should be needed, as long as the acoustic input does
not change significantly.
Aux In jack
The M2R Stereo Receiver offers a 1/8" Aux In jack that allows you to
add another audio source, such as a click track, or ambient microphone
(optional Audio-Technica lavalier microphone, available separately).
• To use a condenser microphone as an ambient microphone, select
Mic-level on the DIP switch inside receiver (
see page 7
), plug
optional Audio-Technica lavalier microphone into the Aux In jack, and
adjust volume control as needed.
• To use the Aux In jack as a line-level input, select Line-level on the
DIP switch inside the receiver (
see page 7
), plug line-level source
(a click track, for example) into the Aux In jack.
Note: If you connect a stereo source (such as an MP3 player)
into the M2R Stereo Receiver’s Aux Input, be certain to use a
mono adapter to protect your equipment from the DC voltage
that is applied to the ring of the stereo connector.
