SMa Series
Super Miniature Belt-Pack Transmitters
With Digital Hybrid Wireless™ Technology
INSTRUCTION MANUAL
SMa Single battery, 100 mW
RM Remote Control
Digital Hybrid Wireless
US Patent 7,225,135
Fill in for your records:
Serial Number:
Purchase Date:
Rio Rancho, NM, USA
www.lectrosonics.com
SMa Series
2
LECTROSONICS, INC.
Thank you for selecting a Lectrosonics SM Series
ultra-miniature transmitter. The unique design provides
specialized features for professional applications:
• Outstanding RF operating range
• Superb audio quality
• Ultra-lightweight, corrosion resistant housing
• Water resistant seals for use in damp environments
• Programmable compatibility modes for use with a
wide variety of different receivers
The Digital Hybrid Wireless® design (US Patent
7,225,135) combines 24-bit digital audio with analog
FM resulting in a system that has the same excellent
operating range, spectral efficiency and long battery life
as analog systems, plus the excellent audio fidelity typical of pure digital systems.
The SM Series transmitters use a standard Lectrosonics 5-pin type input jack for use with electret lavaliere
mics, dynamic mics, or line level signals. A water
resistant control panel with LCD, membrane switches
and multi-color LEDs make input gain adjustments
and frequency and compatibility mode selection quick
and accurate, without having to view the receiver. The
battery compartment accepts AA lithium or rechargeable batteries. The housing is machined from a solid
aluminum block to provide an extremely lightweight and
rugged package. A special non-corrosive finish resists
salt water exposure and perspiration in extreme environments.
Super-Minature Belt Pack Transmitters
Table of Contents
General Technical Description ............................................. 4
Controls and Functions ........................................................ 6
LCD Screen ......................................................................... 6
Power LED ........................................................................... 6
Audio Input Jack................................................................... 6
Battery Compartment and Thumb Screw............................. 6
Modulation LEDs.................................................................. 6
Audio Button ........................................................................ 6
Freq Button .......................................................................... 6
Up/Down Arrows .................................................................. 6
Antenna................................................................................ 6
Setup with the LCD................................................................ 7
Audio Screen ....................................................................... 7
Frequency Screen................................................................ 7
Compatibility Mode Screen.................................................. 7
Turning the Power On .......................................................... 7
Turning the Power Off .......................................................... 7
Entering the Standby Mode ................................................. 7
Lock/Unlock Screen ............................................................. 7
Battery Installation ................................................................ 8
Remote Control Operation................................................... 8
Operating Instructions.......................................................... 9
Power Up and Boot Sequence.............................................9
Power Down.........................................................................9
Standby Mode...................................................................... 9
Selecting the Compatibility Mode......................................... 9
Setting Transmitter Operating Frequency............................. 10
Adjusting the Low Frequency Roll-off .................................. 10
Attaching a Microphone and Adjusting Gain........................ 10
Locking or Unlocking the Control Panel ...............................
Attaching and Removing the Microphone............................
Locking or Unlocking the Control Panel ............................... 11
Attaching and Removing the Microphone............................ 11
5-Pin Input Jack Wiring ......................................................... 12
Installing the Connector: ...................................................... 12
Cable Termination for Non-Lectrosonics Microphones ..... 13
Microphone RF Bypassing................................................... 14
Line Level Signals................................................................ 14
Wiring Hookups for Different Sources ................................ 15
Works with Servo Bias Inputs Only:..................................... 15
Works with Servo Bias Inputs and Earlier Transmitters:....... 15
RM Remote Control Operating Instructions ....................... 16
RM Front Panel Controls...................................................... 16
Powering the RM on and off................................................. 16
Principles of Operation......................................................... 16
RM Pages ............................................................................ 16
Operating Notes................................................................... 17
RM Quick Reference............................................................ 17
Troubleshooting..................................................................... 18
RM Troubleshooting ............................................................. 19
Specifications and Features................................................. 21
Service and Repair ................................................................ 22
Returning Units for Repair ................................................... 22
Rio Rancho, NM
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SMa Series
General Technical Description
Wideband Design
Digital Hybrid transmitters use ±75 kHz wide deviation
for an excellent signal to noise ratio and wide dynamic
range. The DSP controlled input limiter features a wide
range dual envelope design which cleanly limits input
signal peaks over 30 dB above full modulation. Switching
power supplies to provide constant voltages to the transmitter circuits from the beginning (1.5 Volts) to the end
(0.85 Volts) of battery life, and an ultra low noise input
amplifier for quiet operation.
Servo Input
The SM input is a radically different input system compared to previous Lectrosonics transmitter microphone
inputs. It is so superior that this input system will eventually be utilized by all Lectrosonics UHF transmitters. The
improvements are audible and make the transmitters
easier to use and much harder to overload. It is no
longer necessary on some mics to introduce pads to
prevent overload of the input stage, divide the bias
voltage down for some low voltage mics, or reduce the
limiter range at minimum gain settings.
Digital Hybrid Wireless™ Technology*
All wireless links suffer from channel noise to some degree, and all wireless microphone systems seek to minimize the impact of that noise on the desired signal. Conventional analog systems use compandors for enhanced
dynamic range, at the cost of subtle artifacts (known as
“pumping” and “breathing”). Wholly digital systems defeat
the noise by sending the audio information in digital form,
at the cost of some combination of power, bandwidth and
resistance to interference.US Patent 7,225,135
No Pre-Emphasis/De-Emphasis
Lectrosonics Digital Hybrid Wireless™ systems overcome channel noise in a dramatically new way, digitally
encoding the audio in the transmitter and decoding it
in the receiver, yet still sending the encoded information via an analog FM wireless link. This proprietary
algorithm is not a digital implementation of an analog
compandor but a technique that can be accomplished
only in the digital domain, even though the inputs and
outputs are analog.
Channel noise still impacts received signal quality and
will eventually overwhelm a receiver. Digital Hybrid
Wireless™ simply encodes the signal to use a noisy
channel as efficiently and robustly as possible, yielding audio performance that rivals that of wholly digital
systems, without the power and bandwidth problems
inherent in digital transmission.
Because it uses an analog FM link, Digital Hybrid Wireless™ enjoys all the benefits of conventional FM wireless systems, such as excellent range, efficient use of
RF spectrum, and resistance to interference. However,
unlike conventional FM systems, it does away with the
analog compandor and its artifacts.
The Digital Hybrid Wireless™ design results in a signal-tonoise ratio high enough to preclude the need for conventional pre-emphasis (HF boost) in the transmitter and deemphasis (HF roll off) in the receiver. This eliminates the
potential for extreme distortion on signals with abundant
high-frequency information.
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LECTROSONICS, INC.
Super-Minature Belt Pack Transmitters
Low Frequency Roll-Off
The low frequency roll-off can be set for a 3 dB down
point at 35, 50, 70, 100, 120 and 150 Hz to control subsonic and very low frequency audio content in the audio. The actual roll-off frequency will vary slightly depending upon the low frequency response of the microphone.
Excessive low frequency content can drive the transmitter into limiting, or in the case of high level sound systems, can even cause damage to loudspeaker systems.
The roll-off is normally adjusted by ear while listening
as the system is operating.
Input Limiter
A DSP-controlled analog audio limiter is employed before
the analog-to-digital (A-D) converter. The limiter has a range
of more than 30 dB for excellent overload protection. A dual
release envelope makes the limiter acoustically transparent
while maintaining low distortion. It can be thought of as two
limiters in series, a fast attack and release limiter followed by
a slow attack and release limiter. The limiter recovers quickly
from brief transients, with no audible side effects, and also
recovers slowly from sustained high levels, to keep audio
distortion low and while preserving short term dynamics.
Signal Encoding and Pilot Tone
In addition to controlling the limiter, the DSP also encodes the digitized audio from the A-D converter and
adds an ultrasonic pilot tone to control the receiver’s
squelch. A pilot tone squelch system provides a reliable
method of keeping a receiver output muted (squelched)
even in the presence of significant interference. When
the system is operating in the hybrid mode, a different pilot tone frequency is generated for each carrier
frequency to prevent inadvertent squelch problems and
simplify multi-channel coordination.
Microprocessor, PLL and VCO Circuits
A microprocessor monitors user command inputs from
the control panel buttons and numerous other internal
signals. It works intimately with the DSP to ensure the
audio is encoded according to the selected Compatibility Mode and that the correct pilot tone is added to the
encoded signal.
Control Panel
The control panel includes four membrane switches and
an LCD screen to adjust the operational settings. Multicolor LEDs are used to indicate audio signal levels for
accurate gain adjustment and for battery status.
Wide-Band Deviation
±75 kHz deviation improves the signal to noise ratio and
audio dynamic range of a wireless system dramatically,
compared to other designs that use ±30 kHz to 40 kHz
deviation. Wide deviation combined with a high powered
transmitters makes a significant improvement in signal
to noise ratio and operating range.
Battery Options and Operating Time
Switching power supplies convert regulated battery
voltages to operate various circuit stages with maximum efficiency. With the variety of alkaline, lithium and
rechargeable NiMH batteries available today in the AA
format, there are many choices to maximize operating
time or minimize cost as needed for any application.
Frequency Blocks
Lectrosonics established a “block” numbering system
years ago to organize the range of frequencies available from the low 500 MHz band to the upper 700
MHz band. Each block includes 256 frequencies in 100
kHz increments. The block number is part of a simple
formula to derive the frequency. The block number is
multiplied by 25.6 to produce the lowest frequency in
the block. For example, block 27 x 25.6 = 691.200.
Circulator/Isolator
The RF output circuit includes a one way circulator/isolator
using a magnetically polarized ferrite. This device greatly
reduces the RF intermodulation produced when multiple
transmitters are used in close proximity to one another
(several feet apart). The isolator also provides additional
RF output stage protection.
Compatibility Modes
The SM transmitters were designed to operate with
Lectrosonics Digital Hybrid receivers and will yield the
best performance when doing so. However, due to the
flexibility of digital signal processing, the transmitters
can also operate in various compatibility modes for use
with Lectrosonics 200 Series, Lectrosonics 100 Series,
IFB and certain non-Lectrosonics receivers. Contact
the Lectrosonics sales department for a complete list of
compatible non-Lectrosonics receivers.
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SMa Series
Controls and Functions
Modulation
LEDs
Battery
Compartment
Cover Plate
Battery
Compartment
Thumb Screw
PWR LED AUDIO Button FREQ Button
LCD Screen
The LCD is a numeric-type Liquid Crystal Display with
several screens that allow settings to be made with the
AUDIO, FREQ, UP and DOWN to configure the transmitter. Turn on and turn off countdowns appear in the
LCD allowing the transmitter to be turned on for adjustments without the output stage enabled, and to prevent
accidental turn off.
Power LED
The PWR LED glows green when the battery is good.
The color changes to red when there is about 30
minutes of operation left with the recommended lithium
battery. An alkaline battery will have about 20 minutes
of life left. When the LED begins to blink red, there are
only a few minutes of life.
A weak battery will sometimes cause the PWR LED to
glow green immediately after being put in the unit, but
will soon discharge to the point where the LED will go
red or shut off completely. When the SM is in SLEEP
mode, the LED blinks green every few seconds (See
Sleep Mode, page 8).
Note: A NiMH battery will give little or no warning
when it is depleted. If you wish to use NiMH
batteries in the SM, we recommend trying fully
charged batteries in the unit, noting the length of
time that the batteries will run the unit and then
using the battery timer feature available on most
Digital Hybrid receivers.
Audio Input Jack
The Servo Bias input on the SM Series transmitters
accommodates virtually every lavaliere, handheld or
shotgun microphone available, plus line level signals.
Battery Compartment and Thumb Screw
The large knurled thumbscrew is used to release or
secure the Battery Compartment Cover Plate, allowing
access to the battery.
LCD
UP Arrow
Audio
Input Jack
DOWN Arrow
Modulation LEDs
The Modulation LEDs provide a visual indication of the
input audio signal level from the microphone. These two
bicolor LEDs can glow either red or green to indicate
modulation levels. 0 dB in the table below indicates full
modulation.
Signal Level -20 LED -10 LED
Less than -20 dB Off Off
-20 dB to -10 dB Green Off
-10 dB to +0 dB Green Green
+0 dB to +10 dB Red Green
Greater than +10 db Red Red
Audio Button
The AUDIO button is used to display the audio level
setting and low frequency roll-off. The UP and DOWN
arrows adjust the values.
The AUDIO button is also used with the FREQ button to
enter standby mode and to power the transmitter on or off.
Freq Button
The FREQ Button displays the selected operating
frequency and also toggles the LCD between displaying
the actual operating frequency in MHz and a two-digit
hexadecimal number that corresponds to the equivalent
Lectrosonics Frequency Switch Setting.
The FREQ button is also used with the AUDIO button to
enter standby mode and to power the transmitter on or off.
Up/Down Arrows
The Up and Down arrow buttons are used to select the
operating frequency, adjust the audio level, or set the
Compatibility Mode.
Pressing both arrows simultaneously enters the lock
countdown. Holding the two arrow buttons until the
countdown completes locks the control panel buttons so
they can only be used to display current settings. “Loc”
is displayed to indicate the controls are locked.
Once locked, the buttons can be unlocked only by removing the battery, or via the RM remote control (if this
function was enabled in the transmitter setup).
Antenna
The flexible antenna is built with woven, galvanized
steel mesh cable, cut to the 1/4 wavelength of the
center of the frequency block of the transmitter. The
antenna is extremely rugged and moisture resistant.
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LECTROSONICS, INC.
Setup with the LCD
Six screens are used to set up and operate the SM.
These screens are used to set the operating frequency,
adjust the audio input level, select the Compatibility
Mode or lock the control panel and power down the
transmitter.
Audio Screen
The Audio screen is used to
adjust input gain from 0 to +44
dB, and the low frequency rolloff from 35 to 150 Hz. Repeatedly pressing the AUDIO button
toggles back and forth between the two displays. Press
and hold the AUDIO button and use the Up and Down
arrows to make adjustments.
Frequency Screen
The Frequency Screen displays the operating frequency
in MHz or as a two-digit
hexadecimal number that corresponds to the equivalent
Lectrosonics Frequency Switch
Setting. Pressing the FREQ button toggles between the
two displays.
Compatibility Mode
Screen
Holding down the Up arrow button while powering up the SM
opens the Compatibility Mode
and Power setting screens. Repeated pressing of the
FREQ or AUDIO buttons toggles between the Compatibility Mode and Power screens.
Note: RF transmission is prevented while selecting
Compatibility Modes and Power level.
Use the Up and Down arrow buttons to select the desired compatibility mode:
• 400 - for all Lectrosonics 400 Series Digital Hybrid
• 200 - for all Lectrosonics 200 Series receivers.
• 100 - for all Lectrosonics 100 Series receivers.
• 3 - (Mode 3) for non-Lectrosonics analog receivers.
• IFB - for all Lectrosonics IFB receivers.
• 6 - (Mode 6) for non-Lectrosonics analog receivers.
Wireless™ receivers, including the Venue. This mode
offers the best audio quality.
Contact the factory for a list of compatible receivers.
Contact the factory for a list of compatible receivers.
Super-Minature Belt Pack Transmitters
To power off from the compatibility mode screen, press and
hold AUDIO and FREQ together.
Initial Power On
Timer Screen
Turning the Power On
With the power turned off, simultaneously pressing
and holding the AUDIO and FREQ buttons displays a
timer with numerals on the right. The numerals count
up from one and the boot sequence begins when the
count reaches three. “LECtro” is displayed as the boot
sequence begins. If either button is release prior to the
screen reaching numeral three,
the unit will enter the Standby
Mode with no RF output (see
Standby Mode below).
Initial Power Off
Timer Screen
Turning the Power Off
With the unit turned on, simultaneously holding the AUDIO and FREQ buttons starts a countdown timer with
numerals on the right. The screen counts down from
three and the transmitter turns off when it reaches zero.
Releasing either button prior to the Power Off Timer
screen indicating zero returns
the unit to normal operation and
displays the previous screen.
Entering the
Standby Screen
Standby Mode
With the power turned off, pressing the AUDIO and
FREQ buttons for about one second places the unit in
Standby Mode. In this mode the RF output is turned off
so all setup adjustments can be made without interfering with other systems operating in the same location.
The screen displays “rf OFF” to remind the user that the
unit is not transmitting.
Holding the FREQ button in Standby Mode displays the
current operating frequency of the transmitter. The operating frequency can be changed by holding the FREQ
button and pressing either the Up or Down button.
Release the FREQ button, then press and hold it again
to toggle the display between frequency in MHz and the
hex code corresponding to the equivalent Lectrosonics
Frequency Switch Setting.
Holding the AUDIO button in Standby Mode displays
the current audio input level setting. This level can be
changed by holding the AUDIO button and pressing
either the Up or Down button.
Quickly pressing both the FREQ and AUDIO buttons
simultaneiously when the unit is
in Standby Mode powers off the
transmitter.
Lock/Unlock Screen
Simultaneously pressing and
holding both the Up and Down
arrow buttons during normal operation starts the Lock
timer. The timer starts at three and counts down to zero.
Rio Rancho, NM
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SMa Series
When the timer reaches zero, the transmitter’s controls
are locked.
The LCD will display the locked condition as long as the
arrow buttons are held, then revert back to the previous
screen when either button is released.
With the controls locked, the AUDIO and FREQ buttons
can still be used to display current settings. Any attempt
to change a setting by pressing either the Up or Down
arrow button will result in an on-screen “Loc” reminder
that the controls are locked. Remove the batteries to
unlock the control panel.
Important: Once the transmitter is locked, it
cannot be unlocked or powered off using the
buttons.The only ways to unlock a locked
transmitter are to remove the
battery or unlock it via the
RM remote control.
Remote Control
Operation
SM Series transmitters may
be configured to respond to
signals from the RM remote control unit or to ignore
them. This setting is accessed by holding down the
Down arrow button while powering the transmitter on.
Use the arrow keys to toggle between “rc on” (remote
control on) and “rc oFF” (remote control off). The default
setting is “rc on.”
If a remote control signal is detected but the transmitter
is set to “rc oFF”, the message “rc oFF” will be displayed briefly on the transmitter’s LCD, to confirm that a
valid signal was received, but that the transmitter is not
configured to respond to it.
Functions available from the remote control are:
• Audio Level
• Frequency
• Lock/Unlock Buttons
• Sleep/Wake (power saving mode)
In sleep mode, the SM uses 20% of the normal amount
of current. For example, in sleep mode it will drain the
battery as much in five hours as it would do in one hour
of normal operation. Sleep mode can only be invoked
with the remote control, and can only be revoked with the
remote control or by removing the battery. When in sleep
mode, the PWR LED blinks green every few seconds to
indicate that the SM is asleep and not turned off.
Remote Control Screens
Battery Installation
The SM transmitter is powered by a single standard AA
1.5 volt battery. We recommend using lithium batteries
for longest life. In the SM, lithium batteries provide over
4.5 hours of operation at room temperature.
Note: Standard zinc-carbon batteries marked
“heavy-duty” or “long-lasting” are not adequate.
The battery status circuitry is designed for the voltage
drop over the life of lithium batteries.
To install new batteries:
1. Turn the Battery Cover Plate Thumbscrew counterclockwise, open the battery compartment and
remove any old batteries.
2. Insert the new battery (or batteries) into the housing. The positive (+) battery terminal goes into the
transmitter first.
3. Replace the Battery Cover Plate and tighten the
Battery Cover Plate Thumbscrew.
Battery Battery
compartment cover plate
Kevlar covered vent
thumbscrew
Note: The RM is not included with SM Series
transmitters.
“Dweedle tones” can also be downloaded from the
web site at: www.lectrosonics.com. Go to the SM
Series transmitter page and follow the link.
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LECTROSONICS, INC.
Operating Instructions
Super-Minature Belt Pack Transmitters
Power Up and Boot Sequence
1) Ensure that good batteries are installed in the unit.
(See Battery Installation.)
2) Simultaneously press and hold the AUDIO and
FREQ buttons until the Power On Boot Sequence is
initiated. (See Power On Timer.) As the unit turns
on, the Modulation LEDs and PWR LED all glow red,
then green, and then they revert to normal operation, i.e., the Modulation LEDs glow according to the
audio level present at the Audio Input Jack and the
PWR LED glows green (with good batteries).
Modulation
LEDs
UP Arrow
DOWN Arrow
PWR LED
The LCD displays a bootup sequence which con-
AUDIO
Button
FREQ
Button
sists of four screens:
Company Name: Lectro
Frequency Block (bXX) and
Firmware Version (rX.X): b21r1.1 (typ)
Compatibility Mode: CP 400 (typ)
Audio: Aud 12 (typ)
Power Down
1) Simultaneously press
and hold the AUDIO
and FREQ buttons while
observing that the word
“Off” appears in the LCD along with a counter.
2) When the counter reaches “0”, the unit turns off.
Note: If the AUDIO and FREQ buttons are
released before the LCD goes blank at the end of
the countdown, the unit will not turn off. Instead, it
will stay energized and the display will return to the
previous screen.
Initial Power Off
Timer Screen
Standby Mode
Standby Mode allows the user to verify or change the
transmitter’s operating frequency or audio input level
without transmitting any signals. Standby Mode can
only be invoked from a power off condition.
Quickly press and release both the AUDIO and FREQ
buttons simultaneously to enter and exit this mode.
Selecting the
Compatibility Mode
All Digital Hybrid Wireless™
receivers are capable of working with the Lectrosonics SM
transmitter. By selecting the proper compatibility mode,
the SM will also work with 200 Series, 100 Series and
IFB analog receivers, plus some other analog wireless receivers (contact the factory for details). Setting
the Compatibility Mode of the transmitter to match the
receiver is easily done via the Control Panel.
Note: RF transmission is prevented while selecting
Compatibility Modes. Also, the SM exits the
Compatibility Mode screen to Standby Mode. (See
Standby Mode, this section.)
Note: The unit comes from the factory configured
as a 400 Series transmitter.
1) Set the receiver’s audio controls to minimum.
2) Power up the SM and observe the Boot Sequence.
If the Compatibility Mode for the SM does not match
the corresponding receiver, then power off the SM
transmitter.
3) From a power off condition, hold down the Up
arrow, then simultaneously press the AUDIO and
FREQ buttons.
4) The LCD will display the current Compatibility
Mode. Use the Up or Down arrow buttons to set
the Compatibility Mode to match the corresponding
receiver.
The following Compatibility Modes are available:
• 100 Series mode: CP 100
• 200 Series mode: CP 200
• Mode 3 (Contact dealer for details): CP 3
• 400 Series mode: CP 400
• IFB Series mode: CP IFB
• Mode 6 (Contact dealer for details): CP 6
5) The Compatibility Mode selected in Step 4 will be
the current Compatibility Mode until reset using this
procedure. Pressing the AUDIO or FREQ exits into
Standby Mode. To power off from the compatibility
mode screen, press AUDIO and FREQ together.
400 Series or Digital
Hybrid Wireless™
compatibility mode
Rio Rancho, NM
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SMa Series
Setting Transmitter
Operating Frequency
The Operating Frequency of the
SM can be displayed either in
MHz or as a two-digit hexadecimal number. (See Controls and
Functions, FREQ Button.) The
SM’s operating frequency can
be set with the unit in Standby
Mode or powered up for normal
operation. Use the following procedure to change the
Operating Frequency of the SM transmitter:
1) If the LCD is displaying something other than the
Frequency Screen, press the FREQ button on the
SM Control Panel to enter this screen.
Note: The default display is in MHz. Pressing
the FREQ button again displays the operating
frequency as a two-digit hexadecimal number
that corresponds the equivalent Lectrosonics
Frequency Switch Setting.
2) While holding the FREQ button, use the Up or
Down arrow buttons to move the operating frequency up or down in 100 kHz increments from the
current setting.
Note: The operating frequency displayed on the
LCD wraps as it reaches the upper or lower end of
its range. Thus, if you intend to move the operating
frequency from the lower end of the range to the
upper end, it may be faster to do this by using the
Down arrow until the frequency wraps to the upper
end.
Most Lectrosonics receivers indicate the operating
frequency both in MHz and as a two digit hexadecimal number. This conforms to the Lectrosonics
tradition of setting the operating frequency using
two 16-position rotary switches. The SM Series
units offer the ability to set the operating frequency
in a similar manner. Pressing the FREQ button
while the LCD displays the operating frequency in
MHz will change the display to show the equivalent
two-digit hexadecimal frequency select switch setting. Simply use the UP or DOWN arrow to increase
or decrease the operating frequency.
Frequency displayed
in MHz
Frequency displayed as
two-digit hexadecimal
number
Adjusting the Low Frequency Roll-off
Repeatedly press the AUDIO button until the LF rolloff adjustment screen appears. Then press and hold
the AUDIO button while selecting the desired roll-off
frequency with the UP and DOWN arrows.
Attaching a Microphone and Adjusting Gain
The control panel Modulation LEDs indicate the modulation level and limiter activity. Once set, the transmitter’s audio level setting should not be used to control
the volume of your sound system or recorder levels.
This gain adjustment matches the transmitter gain with
the microphone’s output level, the user’s voice level and
the position of the microphone. The audio input level
can be set with the unit in Standby Mode or while powered up in normal operation.
Signal Level -20 LED -10 LED
Less than -20 dB Off Off
-20 dB to -10 dB Green Off
-10 dB to +0 dB Green Green
+0 dB to +10 dB Red Green
Greater than +10 db Red Red
Note: Different voices will usually require
different settings of the AUDIO control, so check
this adjustment as each new person uses the
system. If several different people will be using
the transmitter and there is not time to make the
adjustment for each individual, adjust it for the
loudest voice.
1) With the SM powered off, insert the microphone
plug into the Audio Input Jack, aligning the pins and
ensuring that the connector locks.
See the following page for suggestions on using
the microphone connector and sleeve
2) Place the transmitter in Standby Mode, or if the unit
is to be powered up and adjusted, mute the main
sound system prior to powering up the transmitter.
3) Position the microphone in the location where it will
be used in actual operation.
4) Observe the audio level LEDs while speaking or
singing into the microphone at the same voice level
that will be used during the program. While holding
the AUDIO button, press the UP or DOWN arrow
buttons until the both the -20 and -10 LEDs glow
green, with the -20 LED occasionally flickering red.
This will maximize the signal to noise ratio of the
system with full modulation and provide subtle limiting to prevent overload and audible compression of
signal peaks.
Note: Setting the audio level too high reduces the
dynamic range of the audio signal. Setting the
audio level too low may cause hiss and noise in
the audio.
5) If the unit was set up in Standby Mode, it will be
necessary to turn the transmitter off, then power it
up again in normal operation so the RF output will
be on. Then the other components in the sound or
recording system can be adjusted.
The roll-off frequency can be set to 35, 50, 70, 100, 120
and 150 Hz.
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LECTROSONICS, INC.
Locking or Unlocking the
Control Panel
The Lock mode protects the
transmitter from accidental changes to its settings.
1) Ensure the SM setup is complete (operating frequency, audio level, Compatibility Mode, sensitivity
to remote control).
2) Simultaneously press both the Up and Down arrow buttons to start the Lock timer. When the timer
reaches zero, “Loc” is displayed and the controls
are locked.
Control Panel Locked
Super-Minature Belt Pack Transmitters
2
Important: Once the transmitter is locked, it cannot
be unlocked or powered off using the buttons.
The only ways to unlock a locked transmitter
are to remove the battery or unlock it via the
remote control. The remote control will work only
if the transmitter was previously configured to
respond to the remote control.The unit will
always power up in “unlocked” mode.
Attaching and Removing the Microphone
The flexible sleeve over the 5-pin plug on the microphone helps prevent dust and moisture from getting into
the input jack. A flange is machined into the rim of the
connector on the transmitter to help retain the sleeve
after it is installed.
The following procedure simplifies the attachment and
removal of the microphone to assure the sleeve is
seated securely.
1
Align the pins on the plug and jack and insert the connector.
3
Pinch and
squeeze the
sleeve on this end
to work it down
over the flange.
Squeeze the end of the sleeve so you can feel the connector
inside and press it into the jack until it latches. Pinch and
squeeze the sleeve near the flange and work it down with a
kneading motion over the flange all the way around until it
stays in place flush with the housing. Pull on the connector to
make sure it is firmly latched.
Pull the sleeve over the connector so the ends of the
connector and sleeve are almost flush.
Rio Rancho, NM
4
Release button
To remove the connector, pull the sleeve back to expose the
black release button. Press the button to unlatch the plug.
11
SMa Series
+5 VDC
5-Pin Input Jack Wiring
The wiring diagrams included in this section represent
the basic wiring necessary for the most common types
of microphones and other audio inputs. Some microphones may require extra jumpers or a slight variation
on the diagrams shown.
It is virtually impossible to keep completely up to date
on changes that other manufacturers make to their
products, thus you may encounter a microphone that
differs from these instructions. If this occurs please call
our toll-free number listed under Service and Repair in
this manual or visit our web site at:
www.lectrosonics.com
1
2
3
4
5
GND
BIAS
MIC
BIAS SELECT
LINE IN
100 Ohm
2.7K
1k
+
30uF
10k
Servo Bias
500 Ohm
Pin 4 to Pin 1 = 0 V
Pin 4 Open = 2 V
Pin 4 to Pin 2 = 4 V
30uF
200 Ohm
+
3.3uF
SM Equivalent Input Circuit Wiring
100 Ohm
+
To Virtual Ground
Audio Amplifier
To Limiter Control
Audio input jack wiring:
PIN 1 Shield (ground) for positive biased electret lava-
liere microphones. Shield (ground) for dynamic
microphones and line level inputs.
PIN 2 Bias voltage source for positive biased electret
lavaliere microphones.
PIN 3 Low impedance microphone level input for
dynamic microphones. Also accepts hand-held
electret microphones provided the microphone
has its own built-in battery.
PIN 4 Bias voltage selector for Pin 3. Pin 3 voltage (0, 2
or 4 volts) depends on Pin 4 connection.
Pin 4 tied to Pin 1: 0 V
Pin 4 Open: 2 V
Pin 4 to Pin 2: 4 V
PIN 5 High impedance, line level input for tape decks,
mixer outputs, musical instruments, etc.
Insulator
Insert
TA5F Latchlock
Strain Relief
Installing the Connector:
1) If necessary, remove old connector from microphone
cable.
2) Slide Rubber Boot onto microphone cable with the
large end facing away from the microphone. (See illustration above.)
3) If necessary, slide the 1/8-inch black shrink tubing
onto the mircrophone cable. (This tubing is needed
for some cables to ensure the cable fits snugly in the
rubber boot.)
4) Use the resistors and connector included with this kit
to configure the TA5F to your particular microphone.
(See Wiring Diagrams below.) A length of .065 OD
clear tubing is included if insulating the resistor leads
or shield wire is necessary. (Remove rubber strain
relief from connector backshell by pulling it out of the
backshell.)
TA5F Backshell
(Strain Relief
removed)
5) Slide the Strain Relief over the TA5F Insert and crimp
as shown to the right. Then insert the TA5F Insert
and Strain Relief in the TA5F Latchlock. Screw the
TA5F Flex Relief onto the TA5F Latchlock.
6) If needed, position and shrink the 1/8-inch shrink tubing on the microphone cable, then slide the Rubber
Boot down over the TA5F connector.
TA5F Backshell
with Strain Relief
Remove strain relief if using dust boot
Dust Boot (35510)
Note: If you use the dust boot, remove the rubber
strain relief that is attached to the TA5F cap, or the
boot will not fit over the assembly.
12
LECTROSONICS, INC.
Super-Minature Belt Pack Transmitters
0.3"
Microphone Cable Termination
for Non-Lectrosonics Microphones
TA5F Connector Assembly
Mic Cord Stripping Instructions
1
2 3
VIEW FROM SOLDER
SIDE OF PINS
4
5
0.15"
Crimping to Shield and Insulation
Shield
Crimp these
fingers to
contact the
shield
Insulation
Crimp these
fingers to
clamp the
insulation
Strip and position the cable so that the clamp
can be crimped to contact both the mic cable
shield and the insulation. The shield contact
reduces noise with some microphones and the
insulation clamp increases ruggedness.
NOTE: This termination is intended for UHF
transmitters only. VHF transmitters with 5-pin
jacks require a different termination. Lectrosonics
lavaliere microphones are terminated for
compatibility with VHF and UHF transmitters,
which is different than what is shown here.
Rio Rancho, NM
13
SMa Series
2 WIRE MIC 3 WIRE MIC
Microphone RF Bypassing
When used on a wireless transmitter, the microphone
element is in the proximity of the RF coming from the
transmitter. The nature of electret microphones makes
them sensitive to RF, which can cause problems with
the microphone/transmitter compatibility. If the electret
microphone is not designed properly for use with wireless transmitters, it may be necessary to install a chip
capacitor in the mic capsule or connector to block the
RF from entering the electret capsule.
Some mics require RF protection to keep the radio
signal from affecting the capsule, even though the
transmitter input circuitry is already RF bypassed (see
schematic diagram).
If the mic is wired as directed, and you are having difficulty with squealing, high noise, or poor frequency
response, RF is likely to be the cause.
The best RF protection is accomplished by installing RF
bypass capacitors at the mic capsule. If this is not possible, or if you are still having problems, capacitors can
be installed on the mic pins inside the TA5F connector
housing.
Preferred locations for bypass capacitors
SHIELD
Line Level Signals
The normal hookup for line level signals is: Signal Hot
to pin 5, Signal Gnd to pin 1 and pin 4 jumped to pin 1.
This allows signal levels up to 3V RMS to be applied
without limiting.
If more headroom is needed, insert a 20 k resistor in
series with pin 5. Put this resistor inside the TA5F connector to minimize noise pickup.
CAPSULE
SHIELD
AUDIO
TA5F
CONNECTOR
Alternate locations for bypass capacitors
CAPSULE
AUDIO
BIAS
CONNECTOR
Install the capacitors as follows: Use 330 pF capacitors. Capacitors are available from Lectrosonics. Please
specify the part number for the desired lead style.
Leaded capacitors: P/N 15117
Leadless capacitors: P/N SCC330P
All Lectrosonics lavaliere mics are already bypassed
and do not need any additional capacitors installed for
proper operation.
TA 5F
14
LECTROSONICS, INC.
Super-Minature Belt Pack Transmitters
BALANCED AND FLOATING LINE LEVEL SIGNALS
PLUG
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
4 VOLT POSITIVE BIAS 2-WIRE ELECTRET
UNBALANCED LINE LEVEL SIGNALS
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
NOTE: This servo bias wiring is not compatible with earlier
versions of Lectrosonics transmitters. Check with the factory
to confirm which models can use this wiring.
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Simplified wiring for microphones
such as Countryman B6 Lavalier
and E6 Earset models and others.
NOTE: This servo bias wiring is not compatible with earlier
versions of Lectrosonics transmitters. Check with the factory
to confirm which models can use this wiring.
DPA MICROPHONES (Danish Pro Audio miniature models)
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
LO-Z MICROPHONE LEVEL SIGNALS
Wiring Hookups for Different Sources
In addition to the microphone and line level wiring hookups illustrated below, Lectrosonics makes a number of
cables and adapters for other situations such as connecting musical instruments (guitars, bass guitars, etc.)
to the transmitter. Visit www.lectrosonics.com and
click on Accessories, or download the master catalog.
A lot of information regarding microphone wiring is also
available in the FAQ section of the web site at:
http://www.lectrosonics.com/faq.htm
Follow the instructions to search by model number or
other search options.
Compatible Wiring for Both Servo Bias Inputs and Earlier Transmitters:
Fig. 1
SHIELD
A UDI O
Compatible wiring for microphones such as
Countryman E6 headworn and B6 lavaliere.
Fig. 2
Most common type of wiring for lavaliere mics.
Fully compatible with 5-pin inputs on Lectrosonics
transmitters such as the LM and UM Series.
Fig. 3
3.3 k
PIN
1
1.5 k
2
3
4
5
4
3
5
T A5 F
1
2
Fig. 7
XLR JACK
*NOTE: If the output is balanced but center
tapped to ground, such as on all Lectrosonics
receivers, do not connect Pin 3 of the XLR jack
to Pin 4 of the TA5F connector.
Fig. 8
SLEEVE
LINE LEVEL
RCA or 1/4” PLUG
For signal levels up to 3V (+12 dBu) before limiting. Fully
compatible with 5-pin inputs on other Lectrosonics transmitters
such as the LM and UM Series. A 20k ohm resistor can be
inserted in series with Pin 5 for an additional 20 dB of
attenuation to handle up to 30V (+32 dBu).
TIP
SHIELD
A UDI O
PIN
TA5F
PLUG
1
2
3
4
5
4
3
T A5 F
PLUG
1
5
2
This wiring is for DPA lavalier
and headset microphones.
NOTE: The resistor value can range from 3k to 4k ohms.
Fig. 4
SHIELD
AUDIO
Compatible wiring for microphones
such as negative bias TRAM models.
NOTE: The resistor value can range from 2k to 4k ohms.
Fig. 5
WITH EXTERNAL RESISTOR
Used for 3-wire lavaliere
microphones that require an
external resistor such as the
Sanken COS-11.
This wiring is fully compatible with 5-pin inputs on Lectrosonics
transmitters such as the LM and UM Series. This is the wiring
for the Lectrosonics M152 lavaliere microphone.
SHIELD
DRAIN (BIAS)
SOURCE (AUDIO)
Fig. 6
2.7 k
PIN
Simple Wiring - Can ONLY be used with
1
2
1
4
3
5
3
T A5 F
PLUG
2
4
5
Servo Bias Inputs:
Fig. 9
Fig. 10
Simplified wiring for microphones such as negative bias TRAM.
NOTE: This servo bias wiring is not compatible with earlier
versions of Lectrosonics transmitters. Check with the factory
to confirm which models can use this wiring.
Fig. 11
XLR JACK
Insert 1k resistor in series with pin 3 if attenuation is needed
Rio Rancho, NM
For low impedance dynamic mics or electret
mics with internal battery or power supply.
15
SMa Series
RM Remote Control Operating Instructions
Important: The remote control (RC) mode must
be enabled on your SM Series transmitter for
the RM to function with it. For instructions,
refer to page 8 of this publication.
RM Front Panel Controls
The RM unit gives you remote control of SM Series
transmitters using an audible tone delivered to the
transmitter’s microphone. Operating parameters on the
transmitter can be set by holding the speaker on the
RM close to the microphone and pressing the pushbutton. A “dweedle” tone will play from the RM speaker into
the microphone and the parameter on the transmitter
will be set immediately.
Available adjustments:
• Audio input gain
• Frequency
• Lock or Unlock Modes
• Sleep Mode ON/OFF
When an SM Series Transmitter is in the power saving sleep mode, it uses only 20% of the normal battery drain, so battery life with be 5 times longer. This
is especially useful in situations where the transmitter
is buried deep inside costuming and there are waiting periods between use. The transmitter can “sleep”
for several hours and then be awakened and adjusted
when the production is about to begin.
Powering the RM on and off
To turn the RM on or off, press the AUDIO and FREQ
buttons together briefly. The unit powers up on the page
that was displayed when the unit was powered off last.
A single AA Lithium battery will operate
the RM for up to several years.
NOTE: Only the specific function displayed is
altered. For example, if the remote control is on the
CH (channel) screen, pressing the send button will
set the transmitter’s channel but will not affect any
other setting on the transmitter at that time.
RM Pages
The AUDIO button cycles through 4 pages:
1) Aud - set transmitter’s audio level
2) SLEEP/unSLP - cause transmitter to sleep or wake up
3) Loc/unLoc - lock or unlock transmitter’s buttons
4) Loud - adjust RM speaker volume
(press SEND button for a sample tone)
The FREQ button cycles through 2 or 3 pages, depending on the settings:
1) CH - set transmitter’s channel
(using block-independent hex code)
2) b - select a block number
(optional — uncovers next page)
3) 000.000 - set transmitter’s frequency in MHz
(avail. if a block is selected)
Speaker
Principles of Operation
The RM user interface is organized into pages which
are accessible via the AUDIO and FREQ buttons. Once
on a page, settings can be adjusted with the UP and
DOWN arrow buttons.
To change a transmitter’s setting via the RM, it is necessary to dial in the new setting on the appropriate page
on the RM, and then press the SEND button (on the
side, near the speaker). The speaker should be uncovered and held within a few inches of the transmitter’s
microphone. (The longest usable range is about 6 feet,
depending on the microphone and volume settings
used.)
16
Send Button
When the SEND button is pressed, the selected RM setting is
transmitted via the RM speaker to the microphone attached to
the SM Transmitter.
LECTROSONICS, INC.
Operating Notes
• The sensitivity to the remote
control varies with the transmitter’s audio level setting
and the microphone used, but
it is always possible to make
it work with a sufficiently loud
remote signal at close range.
• If the SMa is congured to
respond to the remote control, it will do so even if the
buttons are locked.
• When the SMa is asleep, it
• When the SM is asleep, the
• If a remote command is sent that would result in
• If you are having trouble getting the SMa to re-
• If the RM is set to a different block number than
• Since all SM transmitters respond to the same sig-
can only be awakened by the
remote control, or by removing and reinserting the battery.
PWR led blinks green every
few seconds.
the same display being shown again on the SM (for
example tuning to the channel already displayed),
a row of dashes is displayed briefly, as a signal that
the command was received, but it didn’t change
anything.
spond, make sure you aren’t covering the RM’s
speaker with your thumb, and/or turn up the RM’s
speaker volume on the “Loud” page.
the transmitter and an attempt is made to set the
transmitter’s frequency in MHz, the command
will still work. The transmitter is simply set to the
corresponding channel in the correct block, with a
matching hex code.
nals, take care that the remote control is presented
only to the desired transmitter, with the minimum
speaker volume necessary to do the job reliably.
Note: The audio signal from the RM will change
the settings of all transmitters within range.
Experiment with this to prevent accidental changes
to another transmitter during a production.
Super-Minature Belt Pack Transmitters
The RM should be held close enough to the microphone to
change the settings on the intended transmitter, but not be so
loud as to affect other transmitters nearby.
RM Quick Reference
Power On/Off AUDIO+FREQ
Set SM audio level Aud page (via AUDIO)
Sleep or Wake SM SLEEP/unSLP page (via AUDIO)
Lock or Unlock SM Loc/unLoc page (via AUDIO)
Adjust RM volume Loud page (via AUDIO)
Set SM channel (hex) CH page (via FREQ)
Enable MHz display b (block) page (via FREQ)
Set SM channel (MHz) 000.000 page (via FREQ)
Important: The remote control (RC) mode must
be enabled on your SM Series transmitter for
the RM to function with it. For instructions,
refer to page 8 of this publication.
Rio Rancho, NM
17
SMa Series
Troubleshooting
Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that you
follow these steps in the sequence listed.
SYMPTOM POSSIBLE CAUSE
TRANSMITTER PWR LED OFF 1) Battery is inserted backwards or dead.
TRANSMITTER PWR LED BLINKS GREEN EVERY FEW SECONDS,TRANSMITTER
DOES NOT RESPOND OTHERWISE 1) Transmitter has been put to sleep by the remote control.
AUDIO LEVEL LEDs NOT LIGHTING 1) Gain control set to minimum.
RECEIVER RF INDICATOR OFF 1) Transmitter not turned on, or is in Standby Mode.
2) Transmitter not powered up. (See Operating Instructions,
Power UP and Boot Sequence.)
Either use the remote control to wake it up again or remove
and reinsert the transmitter’s battery.
2) Battery is dead or installed backwards. Check PWR LED.
3) Mic capsule is damaged or malfunctioning.
4) Mic cable damaged or mis-wired.
2) Transmitter battery is dead.
3) Receiver antenna missing or improperly positioned.
4) Transmitter and receiver not on same frequency.
Check switches/display on transmitter and receiver.
5) Transmitter and receiver not on same frequency block.
6) Operating range is too great.
7) Defective transmitter antenna - unit needs repair.
NO SOUND (OR LOW SOUND LEVEL), RECEIVER INDICATES PROPER AUDIO MODULATION
DISTORTED SOUND 1) Transmitter gain (audio level) is far too high. Check SM
EXCESSIVE FEEDBACK 1) Transmitter gain (audio level) too high. Check gain adjustment
1) Receiver output level set too low.
2) Receiver output disconnected, or cable defective or mis-wired.
3) Sound system or recorder input is turned down.
LEDs and receiver audio levels as SM is being used.
2) Receiver output may be mismatched with the sound system or
recorder input. Adjust output level on receiver to the correct level
for the recorder, mixer or sound system. (Use the receiver’s Tone
function to check level.)
3) Excessive wind noise or breath “pops.” Reposition microphone
and/or use a larger windscreen.
4) Transmitter is not set to same frequency as receiver. Check that
operating frequency on receiver and transmitter match.
5) Receiver/Transmitter Compatibility Mode mismatched.
and/or reduce receiver output level.
2) Talent standing too close to speaker system.
3) Mic is too far from user’s mouth.
18
LECTROSONICS, INC.
Super-Minature Belt Pack Transmitters
SYMPTOM POSSIBLE CAUSE
HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) far too low.
“Loc” APPEARS IN DISPLAY WHEN ANY BUTTON IS PRESSED
“Hold” APPEARS IN DISPLAY WHEN ARROW BUTTONS ARE PRESSED
“PLL” APPEARS IN DISPLAY 1) Indication that the PLL is not locked. This is a serious condition
TRANSMITTER WON’T RESPOND TO REMOTE CONTROL
2) Receiver antenna missing or obstructed.
3) Transmitter antenna broken or missing.
4) Operating range too great.
5) Signal interference. Turn off transmitter. If receiver’s signal
strength indicator does not drop to nearly zero, this indicates an
interfering signal may be the problem.
Try a different operating frequency.
1) Control Panel is locked. (See Operating Instructions, Locking
and Unlocking the Control Panel.)
1) Reminder that it is necessary to hold down the AUDIO or FREQ
button to make adjustments to the audio gain or frequency settings.
that requires factory repair. It may be possible to operate on
another frequency far removed from the one that was selected
when the unlocked condition was indicated.
1. If LCD blinks “rc oFF”, transmitter has not be configured
to respond to the remote control. See “Remote Control Operation”
on page 8 for instructions on how to configure.
2. If LCD blinks “- - - - - -”, transmitter is already set as
requested by the remote control.
3. If transmitter doesn’t not respond at all, try moving the remote
control closer to the microphone or increasing the remote control’s
loudness setting, or increasing audio level on transmitter.
4. SM, SMD and SMQ transmitters must have firmware ver. 1.5
or higher to work with the RM. All “a” versions of the SM Series will
work from firmware ver. 1.0 and up. The firmware version will flash
briefly on the right side of the LCD during power up.
RM Troubleshooting
SM FREQUENCY CHANGES, BUT NOT TO DESIRED FREQUENCY
RM FAILS TO CHANGE SETTINGS ON TRANSMITTER
Rio Rancho, NM
1) RM set on different block than transmitter in question. RM uses
hex code to set frequency - set RM to proper frequency block, or
use hex code method to change frequency.
1) Make sure volume of RM and proximity of microphone are
sufficient to engage transmitter.
2) Make sure transmitter is not in Sleep mode.
19
SMa Series
Included Accessories
SMa/SMV:
PSM Leather pouch with
integrated belt clip
35923 Thermal insulated pad
Optional Accessories
SMKITTA5 Connector kit for SMa series
transmitters, 5-pin TA5F plug with sleeve
installed on SMa
SMBCUPSL Spring-loaded machined
Place thermal
insulation pad on
Place thermal
back of unit, as
insulation pad on
pictured.
back of unit, as
pictured.
SMBCUP Machined, wire belt clip for SMa/SMV
transmitters, antenna up
aluminum clip. Antenna
and mic connector
will face up.
SMBCDN Machined, wire belt clip for SMa/SMV
20
transmitters, antenna down
SMBCDNSL Hinged belt clip for single battery SM
.
transmitters. Antenna and mic connector
will face down.
LECTROSONICS, INC.
Specifications and Features
z 1
Operating frequencies:
Block 470 470.100 - 495.600
Block 19 486.400 - 511.900
Block 20 512.000 - 537.500
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 588.800 - 607.900 and 614.100 - 614.300
Block 24 614.400 - 639.900
Block 25 640.000 - 665.500
Block 26 665.600 - 691.100
Block 27 691.200 - 716.700 (export only)
Block 28 716.800 - 742.300 (export only)
Block 29 742.400 - 767.900 (export only)
Block 944 944.100 - 951.900
(Frequency usage varies by country)
Frequency range: 256 frequencies in 100 kHz steps
Channel Spacing: 100 kHz
Frequency selection: Control panel mounted membrane switches
RF Power output: SMa: 100 mW (nominal)
Compatibility Modes (6) Digital Hybrid Wireless™ (400 Series),
Pilot tone: 25 to 32 kHz; 5 kHz deviation
Frequency stability: ± 0.002%
Deviation: ± 75 kHz max. (in 400 Series Mode)
Spurious radiation: 60 dB below carrier
Equivalent input noise: –125 dBV, A-weighted
Input level:
Input impedance:
Input limiter: Soft limiter, 30 dB range
Bias voltages: Fixed 5 V at up to 5 mA
for one 25.5 MHz wide block
200 Series, 100 Series, Mode 3
(other analog), Mode 6, and IFB
(in 400 Series Mode)
If set for dynamic mic: 0.5 mV to 50 mV before limiting.
Greater than 1 V with limiting.
If set for electret lavaliere mic: 1.7 uA to 170 uA before limiting.
Greater than 5000 uA (5 mA) with limiting.
Line level input: 17 mV to 1.7 V before limiting.
Greater than 50 V with limiting.
Dynamic mic: 300 Ohms
Electret lavaliere: Input is virtual ground with servo adjusted
constant current bias
Line level: 2.7 k Ohms
Super-Minature Belt Pack Transmitters
Gain control range: 40 dB; panel mounted membrane switches
Modulation indicators: Dual bicolor LEDs indicate modulation of
Controls: Control panel with LCD and four membrane
Low frequency roll-off: Adjustable from 35 to 150 Hz.
Audio Frequency Response: 35 Hz to 20 kHz, +/-1 dB (The low frequency
+6
+3
0dB
-3
-6
-9
-12
Signal to Noise Ratio (dB):
(overall system, 400 Series mode)
(Note: the dual envelope “soft”
limiter provides exceptionally
good handling of transients
using variable attack and release
time constants. The gradual onset of limiting in the design begins below full
modulation, which reduces the measured figure for SNR without limiting by 4.5 dB)
Total Harmonic Distortion: 0.2% typical (400 Series mode)
Audio Input Jack: Switchcraft 5-pin locking (TA5F)
Antenna: Flexible, unbreakable steel cable.
Batteries:
Battery Life:
Weight: RM: 2.3 oz.. (65.8 grams) with lithium battery
Selectable 2 V or 4 V servo bias for any
electret lavaliere.
–20, -10, 0, +10 dB referenced to
full modulation.
switches.
Mic in 35 Hz
Roll-off
Line in
Mic in 150 Hz
Roll-off
30
100
1kH
20k
0k
roll-off is adjustable - see graph above)
SmartNR No Limiting w/Limiting
OFF 103.5 108.0
NORMAL
FULL
107.0
108.5
111.5
113.0
1.5 Volt AA lithium or rechargeable
NiMH recommended
SMa: 1.5 hours (alkaline); 5.5 hours (lithium),
4 hours with 2500mAh NiMH
SMa: 2.7 oz.. (75.9 grams) with lithium battery
Overall Dimensions:
SMa//RM: 2.3 x 1.8 x 0.64 inches
(not including microphone/lanyard)
58 x 46 x 16 mm
(not including microphone/lanyard)
Emission Designator: 180KF3E
Specifications subject to change without notice.
The FCC requires that the following statements be
included in this manual for SM Series transmitters:
For body worn operation, this SMa Belt-Pack Transmitter has
been tested and meets the FCC RF exposure guidelines
when used with the Lectrosonics accessories supplied or
designated for this product. Use of other accessories may
not ensure compliance with FCC RF exposure guidelines.
Contact Lectrosonics if you have any questions or need more
information about RF exposure using this product..
This device complies with FCC radiation exposure limits as
set forth for an uncontrolled environment. This device should
be installed and operated so that its antenna(s) are not colocated or operating in conjunction with any other antenna or
transmitter.
Rio Rancho, NM
The FCC requires that the following statement be included in this manual for the RM:
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1) This
device may not cause harmful interference, and (2) this device
must accept any interference received, including interference
that may cause undesired operation.
21
SMa Series
Service and Repair
If your system malfunctions, you should attempt to correct or isolate the trouble before concluding that the equipment
needs repair. Make sure you have followed the setup procedure and operating instructions. Check the interconnecting
cables and then go through the Troubleshooting section in this manual.
We strongly recommend that you do not try to repair the equipment yourself and do not have the local repair shop attempt anything other than the simplest repair. If the repair is more complicated than a broken wire or loose connection,
send the unit to the factory for repair and service. Don’t attempt to adjust any controls inside the units. Once set at the
factory, the various controls and trimmers do not drift with age or vibration and never require readjustment. There are
no adjustments inside that will make a malfunctioning unit start working.
LECTROSONICS’ Service Department is equipped and staffed to quickly repair your equipment. In warranty repairs
are made at no charge in accordance with the terms of the warranty. Out-of-warranty repairs are charged at a modest
flat rate plus parts and shipping. Since it takes almost as much time and effort to determine what is wrong as it does
to make the repair, there is a charge for an exact quotation. We will be happy to quote approximate charges by phone
for out-of-warranty repairs.
Returning Units for Repair
For timely service, please follow the steps below:
A. DO NOT return equipment to the factory for repair without first contacting us by email or by phone. We need
to know the nature of the problem, the model number and the serial number of the equipment. We also need a
phone number where you can be reached 8 A.M. to 4 P.M. (U.S. Mountain Standard Time).
B. After receiving your request, we will issue you a return authorization number (R.A.). This number will help speed
your repair through our receiving and repair departments. The return authorization number must be clearly shown
on the outside of the shipping container.
C. Pack the equipment carefully and ship to us, shipping costs prepaid. If necessary, we can provide you with the
proper packing materials. UPS is usually the best way to ship the units. Heavy units should be “double-boxed” for
safe transport.
D. We also strongly recommend that you insure the equipment, since we cannot be responsible for loss of or dam-
age to equipment that you ship. Of course, we insure the equipment when we ship it back to you.
Lectrosonics USA:
Mailing address: Shipping address: Telephone:
Lectrosonics, Inc. Lectrosonics, Inc. (505) 892-4501
PO Box 15900 581 Laser Rd. (800) 821-1121 Toll-free
Rio Rancho, NM 87174 Rio Rancho, NM 87124 (505) 892-6243 Fax
USA USA
Web: E-mail:
www.lectrosonics.com sales@lectrosonics.com
Lectrosonics Canada:
Mailing Address: Telephone: E-mail:
49 Spadina Avenue, (416) 596-2202 Sales: colinb@lectrosonics.com
Suite 303A (877) 753-2876 Toll-free Service: joeb@lectrosonics.com
Toronto, Ontario M5V 2J1 (877-7LECTRO)
(416) 596-6648 Fax
22
LECTROSONICS, INC.
Super-Minature Belt Pack Transmitters
Rio Rancho, NM
23
LIMITED ONE YEAR WARRANTY
The equipment is warranted for one year from date of purchase against defects in
materials or workmanship provided it was purchased from an authorized dealer. This
warranty does not cover equipment which has been abused or damaged by careless
handling or shipping. This warranty does not apply to used or demonstrator equipment.
Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any
defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot
correct the defect in your equipment, it will be replaced at no charge with a similar new
item. Lectrosonics, Inc. will pay for the cost of returning your equipment to you.
This warranty applies only to items returned to Lectrosonics, Inc. or an authorized
dealer, shipping costs prepaid, within one year from the date of purchase.
This Limited Warranty is governed by the laws of the State of New Mexico. It states the
entire liablility of Lectrosonics Inc. and the entire remedy of the purchaser for any
breach of warranty as outlined above. NEITHER LECTROSONICS, INC. NOR
ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT
SHALL BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL,
OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
THIS EQUIPMENT EVEN IF LECTROSONICS, INC. HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF
LECTROSONICS, INC. EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE
EQUIPMENT.
This warranty gives you specific legal rights. You may have additional legal rights which
vary from state to state.
581 Laser Road NE • Rio Rancho, NM 87124 USA • www.lectrosonics.com
(505) 892-4501 • (800) 821-1121 • fax (505) 892-6243 • sales@lectrosonics.com
SMa_Seriesman.indd
15 April 2010
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