Lectrosonics M2R Instruction Manual
M2R
Digital IEM Receiver
INSTRUCTION MANUAL
Fill in for your records:
Quick Start Summary
1) Install receiver batteries (pg. 6).
2) Power unit on with On/Off and Volume knob (pg. 4).
3) Scan for an available frequency (pg.9).
4) Sync the receiver with a transmitter (pg. 10).
5) Enable RF in transmitter (see transmitter manual).
6) Send audio (pg. 9).
Serial Number:
Purchase Date:
Rio Rancho, NM, USA
www.lectrosonics.com
M2R
Table of Contents
Quick Start Summary ............................................................................................................................................................................1
M2R Digital IEM Receiver ...................................................................................................................................................................3
FlexList™ ..............................................................................................................................................................................................3
RF Front-End with Tracking Filter ..........................................................................................................................................................3
Panels and Features ...............................................................................................................................................................................4
Battery Status LED ...............................................................................................................................................................................5
RF Link LED ..........................................................................................................................................................................................5
On/Off and Volume Knob ......................................................................................................................................................................5
IR (infrared) Port ...................................................................................................................................................................................5
USB Port ...............................................................................................................................................................................................5
Battery Compartment............................................................................................................................................................................ 5
Keypad and LCD Interface ....................................................................................................................................................................5
Installing Batteries .................................................................................................................................................................................6
LCD Main Window ................................................................................................................................................................................6
LCD Menu Map ........................................................................................................................................................................................8
Menu Item Descriptions .........................................................................................................................................................................9
System Setup Procedures ...................................................................................................................................................................12
Accessories ..........................................................................................................................................................................................13
Specifications .......................................................................................................................................................................................13
Wireless Designer Software and USB Driver .....................................................................................................................................14
Wireless Designer Software and USB Driver .....................................................................................................................................15
Software Installer ................................................................................................................................................................................15
Firmware Update Instructions .............................................................................................................................................................15
Service and Repair ...............................................................................................................................................................................17
Returning Units for Repair ..................................................................................................................................................................17
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, my cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
2
LECTROSONICS, INC.
Digital IEM Receiver
M2R Digital IEM Receiver
The M2R Digital IEM Receiver is a compact, rugged
body-worn unit providing studio-grade sound quality
for performers or any professionals needing to monitor
detailed audio wirelessly. The M2R employs advanced
antenna diversity switching during digital packet
headers for seamless audio. The receiver covers UHF
frequencies from 470.100 to 614.375 MHz and uses
digital modulation. The 24-bit digital audio stream
guarantees high resolution sound quality with wide
dynamic range, low noise floor, and solid stereo image.
The headphone jack is fed from a high-quality stereo
amplifier with 250 mW available to drive even inefficient headphones or earphones to sufficient levels for
stage performance or other noisy environments. The
receiver can select from stereo, mono from left or right
channels only, or mono from both channels, giving
the unit flexibility in terms of application as an IEM or
IFB receiver. An intuitive interface and high resolution,
color LCD on the unit provide performing artists and
audio professionals alike with a comfortable and confident user experience.
The M2R also employs 2-way IR sync, so can data
from the receiver can be sent to a transmitter and
thus onto Wireless Designer™ Software, via USB or
Ethernet. This way, frequency planning and coordination can be done quickly and confidently with on-site
RF information.
FlexList™
Additionally, the M2R includes a FlexList™ mode,
where up to 16 mixes can be accessed by name. This
feature enables a monitor engineer to quickly find and
listen to any of the performer’s mixes on the stage.
A FlexList mix is a profile of a performer’s personal
transmitter. The mix includes the performer’s name
(or whatever name the user chooses for that unit),
frequency, mixer settings and limiter settings. The mix
is easily shared via the M2R IR port, added to the list
of 16 mixes and stored until cleared by the user. The
M2R allows the user to toggle between the mixes,
making troubleshooting issues easy and efficient.
RF Front-End with Tracking Filter
A wide tuning range is helpful in finding clear frequencies for operation, however, it also allows a greater
range of interfering frequencies to enter the receiver.
The UHF frequency band, where almost all wireless
microphone systems operate, is heavily populated by
high power TV transmissions. The TV signals are immensely more powerful than a wireless microphone or
IEM transmitter signal and will enter the receiver even
when they are on significantly different frequencies
than the wireless system. This powerful energy appears as noise to the receiver, and has the same effect
as the noise that occurs with extreme operating range
of the wireless system (noise bursts and dropouts). To
alleviate this interference, front-end filters are needed
in the receiver to suppress RF energy below and
above the operating frequency.
The M2R receiver employs a selective frequency,
tracking filter in the front-end section (the first circuit
stage following the antenna). As the operating frequency is changed, the filters re-tune into six different
“zones” depending on the selected carrier frequency.
BLOCK
470 MHz
BLOCK
BLOCK
In the front-end circuitry, a tuned filter is followed by
an amplifier and then another filter to provide the selectivity needed to suppress interference, yet provide a
wide tuning range and retain the sensitivity needed for
extended operating range.
BLOCK
BLOCK
BLOCK
614 MHz
Rio Rancho, NM
3
M2R
Panels and Features
RF Link LED
Battery status
LED
Belt clip
mounting
sockets
USB
port
On/Off and
volume knob
IR (infrared)
port
Headphone
output
4
Battery compartment
door
LECTROSONICS, INC.
Digital IEM Receiver
Battery Status LED
When the battery status LED on the keypad glows
green the batteries are good. The color changes to red
at a midpoint during the runtime. When the LED begins
to blink red, only a few minutes remain.
The exact point at which the LED turns red will vary
with battery brand and condition, temperature and
power consumption. The LED is intended to simply
catch your attention, not to be an exact indicator of
remaining time.
A weak battery will sometimes cause the LED to glow
green immediately after the transmitter is turned on,
but it will soon discharge to the point where the LED
will turn red or the unit will turn off completely.
RF Link LED
When a valid RF signal from a transmitter is received,
this LED will light up blue.
On/Off and Volume Knob
Turns unit on or off and controls headphone audio
level.
IR (infrared) Port
Settings, including frequency, name, limiter, mix mode,
etc. can be transferred between transmitter and receiver. FlexList profiles can be gathered by the receiver. Frequency scan information can be sent from the
receiver to the transmitter and into Wireless Designer
software for coordination purposes.
Keypad and LCD Interface
MENU/SEL Button
Pressing this button enters the menu and selects
menu items to enter the setup screens.
BACK Button
Pressing this button returns to the previous menu or
screen.
Arrow Buttons
Used to navigate the menus.
Headphone Output
A recessed, high duty cycle 3.55 mm stereo jack is
provided for standard headpohnes and earphones.
USB Port
Firmware updates via Wireless Designer are made
easy with the USB port on the side panel.
Battery Compartment
Two AA batteries are installed as marked on the rear
panel of the receiver. The battery door is hinged and
remains attached to the housing.
Rio Rancho, NM
5
M2R
Installing Batteries
Power is provided by two AA batteries. The batteries
are connected in series by a plate in the battery door.
Slide the battery
door outward to
open it
Polarity is marked on the rear panel.
Polarity markings
LCD Main Window
Receiver
Name
RF Level
RF level
The triangle graphic corresponds to the scale on the
left side of the display. The scale indicates the incoming signal strength in microvolts, from 1 uV at the bottom to 1,000 uV (1 millivolt) at the top.
Diversity activity
The two antenna icons will alternately light up depending on which one is receiving the stronger signal.
Battery Life Indicator
The battery life icon is an approximate indicator of the
remaining battery life. For the most accurate indication,
the user should select “Battery Type” in the menu and
select Alkaline or Lithium.
Audio level
This bar graph indicates the level of the audio entering
the transmitter. The “0” refers to the level reference, as
chosen in the transmitter, i.e. either +4 dBu or -10 dBV.
Diversity
Activity
Battery life
indicator
Audio Level
6
LECTROSONICS, INC.
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