Lectrosonics SMQV User manual

SMV Series
Super Miniature Variable Power Transmitters
With Digital Hybrid Wireless®Technology
SMQV Dual battery 50, 100, 250 mW
SMV Single battery 50, 100 mW
RM Remote Control
RM2 Remote Control
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
Fill in for your records:
Serial Number:
Purchase Date:
US Patent 7,225,135

SMQV
LECTROSONICS, INC.
2
Introduction
The SM Series variable power transmitters are the
product of many years of engineering and experience in
professional audio markets. The unique design provides
several distinct features for professional applications:
• Selectableoutputpowertomaximizebatterylifeor
operating range as needed
• Superb,compandor-free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 operating
range as analog systems, the same spectral efficiency
as analog systems, the same long battery life as analog
systems, plus the excellent audio fidelity typical of pure
digital systems.
The SM Series transmitters feature the unique servo
bias input circuitry with a standard TA5M 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, frequency and compatibility
mode selection quick and accurate, without having to
view the receiver. The battery compartment accepts
AA lithium or rechargeable batteries. The housings are
machined from solid aluminum blocks to provide an
extremely lightweight and rugged package. A special
non-corrosivenishresistssaltwaterexposureand
perspiration in extreme environments.
TheDSP-baseddesignworkswithallDigitalHybrid
receivers, and is backward compatible for use with
Lectrosonics 200 Series, 100 Series, IFB receivers and
some other brands of analog wireless receivers.

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 3
Table of Contents
Introduction.............................................................................2
General Technical Description ..............................................4
Servo Bias Input....................................................................4
NoPre-Emphasis/De-Emphasis ...........................................4
LowFrequencyRoll-Off ........................................................4
Input Limiter ..........................................................................4
SignalEncodingandPilotTone ............................................5
Microprocessor Control.........................................................5
Compatibility Modes..............................................................5
Control Panel ........................................................................5
Wide-BandDeviation ............................................................5
VariablePowerOutput ..........................................................5
BatteryOptionsandOperatingTime ....................................5
Frequency Blocks..................................................................5
Circulator/Isolator..................................................................5
Controls and Functions .........................................................6
LCD Screen ..........................................................................6
PowerLED ............................................................................6
Audio Input Jack....................................................................6
AUDIOButton .......................................................................6
FREQButton.........................................................................6
Up/DownArrows ...................................................................6
Antenna.................................................................................6
Setup Screens.........................................................................7
Audio Screen .......................................................................7
Frequency Screen.................................................................7
Lock/UnlockScreen ..............................................................7
RemoteControlOperation ....................................................7
Battery Installation .................................................................8
Operating Instructions...........................................................8
Power Up and Boot Sequence..............................................8
Power Down..........................................................................8
Standby Mode.......................................................................9
SelectingtheCompatibilityModeandOutputPower.............9
SettingTransmitterOperatingFrequency..............................9
Adjusting Audio Level (Gain)...............................................10
Locking or Unlocking the Controls ......................................10
Attaching and Removing the Microphone...........................11
5-Pin Input Jack Wiring ........................................................12
Installing the Connector: .....................................................12
Microphone Cable Termination for
Non-Lectrosonics Microphones..........................................13
Microphone RF Bypassing..................................................14
Line Level Signals...............................................................14
Wiring Hookups for Different Sources ...............................15
CompatibleWiring...............................................................15
SimpleWiringforServoBias ..............................................15
Optional RM Remote Control ..............................................16
Powering the RM on and off................................................16
Setup Screens ....................................................................16
OperatingNotes..................................................................17
RMQuickReference...........................................................17
RM2 Remote Control............................................................17
Troubleshooting....................................................................18
RM Troubleshooting ............................................................19
Included Accessories...........................................................20
Optional Accessories...........................................................20
Whip Antennas .....................................................................21
Specifications and Features................................................22
Service and Repair ...............................................................23
Returning Units for Repair ..................................................23

SMQV
LECTROSONICS, INC.
4
Variable 1.8 - 4v
+6V
+5V 5V
Regulator
Servo Bias Input
The voltage and current requirements of the wide vari-
ety of electret microphones used in professional appli-
cations has caused confusion and compromises in the
wiring needed for wireless transmitters. To address this
problem, the unique Servo Bias input circuit provides an
automatically regulated voltage over a very wide range
of current for compatibility with all microphones.
Digital Hybrid Wireless®Technology
All wireless links suffer from channel noise to some de-
gree, and all wireless microphone systems seek to mini-
mizetheimpactofthatnoiseonthedesiredsignal.Con-
ventional analog systems use compandors for enhanced
dynamic range, at the cost of subtle artifacts (typically
“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.
Digital Hybrid systems overcome channel noise in a
dramatically new way, digitally encoding the audio in the
transmitter and decoding it in the receiver, yet still send-
ing the encoded information via an analog FM wireless
link. This proprietary algorithm is not a digital imple-
mentation of an analog compandor but a technique that
can be accomplished only in the digital domain, even
though the inputs and outputs are analog.
Because it uses an analog FM link, the Digital Hybrid
system enjoys all the benefits of conventional FM wire-
less systems and it does away with the analog compan-
dor and its artifacts.
General Technical Description
No Pre-Emphasis/De-Emphasis
TheDigitalHybriddesignresultsinasignal-to-noiseratio
highenoughtoprecludetheneedforconventionalpre-
emphasis(HFboost)inthetransmitterandde-emphasis
(HF roll off) in the receiver. This eliminates the potential
fordistortionofsignalswithabundanthigh-frequency
information.
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sub-
sonic and very low frequency audio content in the au-
dio.Theactualroll-offfrequencywillvaryslightlydepend-
ing upon the low frequency response of the microphone.
Excessivelowfrequencycontentcandrivethetransmit-
ter into limiting, or in the case of high level sound sys-
tems, 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be-
foretheA-Dconverter.Thelimiterhasarangeofmore
than 30 dB for excellent overload protection. A dual re-
lease envelope makes the limiter acoustically transpar-
ent 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 while preserving
short term dynamics.

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 5
Signal Encoding and Pilot Tone
In addition to controlling the limiter, the DSP also en-
codesthedigitizedaudiofromtheA/Dconverterand
adds an ultrasonic pilot tone to control the squelch in
the receiver. A pilot tone squelch system provides a reli-
able method of keeping a receiver output muted (audio
mute) even in the presence of significant interference.
Whenthesystemisoperatinginthehybridmode,adif-
ferent pilot tone frequency is generated for each carrier
frequency to prevent inadvertent squelch problems in
multi-channelsytems.
Microprocessor Control
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 Compatibil-
ity Mode and that the correct pilot tone is added to the
encoded signal.
Compatibility Modes
SM transmitters are designed to operate with Lec-
trosonics Digital Hybrid receivers and will yield the
best performance when doing so, however, due to the
flexibility of digital signal processing, the transmitter
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 more information
aboutnon-Lectrosonicsreceivers.
Control Panel
The control panel includes four membrane switches and
anLCDscreentoadjusttheoperationalsettings.Multi-
color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.
Variable Power Output
Thisadvancedfeatureallowstheoperatortooptimize
the transmitter for maximum battery life, or for maximum
operating range. Power output is selected using the
LCD in a setup mode while the RF output of the trans-
mitter is turned off.
Battery Options and Operating Time
Switching power supplies convert regulated battery
voltages to operate various circuit stages with maxi-
mumefciency.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.
The firmware “remembers” the power status when a
battery fails, so the transmitter will be turned on auto-
matically when the battery is replaced and the previous
settings will be enabled.
Frequency Blocks
Lectrosonics established a “block” numbering system
yearsagotoorganizetherangeoffrequenciesavail-
ablefromthelowendat470MHzbandtotheupper
endat952MHz.Eachblock(except944)includes256
frequenciesin100kHzsteps,whichisthemaximum
switching range of the transmitters. Block 944 is a spe-
cialbandbetween944and952MHz.
Circulator/Isolator
TheRFoutputcircuitincludesaonewaycirculator/iso-
latorusingamagneticallypolarizedferrite.Thisdevice
greatly reduces 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 against static
shock.

SMQV
LECTROSONICS, INC.
6
Controls and Functions
LCD Screen
TheLCDisanumeric-typeLiquidCrystalDisplaywith
screens for adjusting power, frequency, audio level and
lowfrequencyaudioroll-off.Thetransmittercanbe
powered up with or without the RF output turned on. A
countdown appears in the LCD when powering on and
off, allowing the transmitter to be turned on without RF
for adjustments, and to prevent accidentally turning it off
with momentary button presses.
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.
Note: A NiMH rechargeable battery will give little
or no warning when it is depleted. If you wish
to use NiMH batteries, we recommend trying
fully charged batteries in the unit and using the
battery timer feature available in most receivers to
determine the available operating time.
AweakbatterywillsometimescausethePWRLEDto
glow green immediately after the TX is turned on, but
willsoondischargetothepointwheretheLEDwillturn
redortheunitwillturnoffcompletely.Whenthetrans-
mitterisinSLEEPmode,theLEDblinksgreenevery
few seconds.
Audio Input Jack
The Servo Bias input circuitry accommodates virtually
every lavaliere, handheld or shotgun microphone avail-
able, plus line level signals.
Battery Compartment and Thumb Screw
The large knurled thumbscrew is used to release or
secure the Battery Compartment Cover Plate.
Modulation LEDs
Proper input gain adjustment is critical to ensure the
bestaudioquality.TwobicolorLEDswillgloweitherred
or green to accurately indicate modulation levels. The
input circuitry includes a wide range DSP controlled
limiter to prevent distortion at high input levels.
It is important to set the gain (audio level) high enough
to achieve full modulation during louder peaks in the
audio. The limiter can handle over 30 dB of level above
fullmodulation,sowithanoptimumsetting,theLEDs
willashredduringuse.IftheLEDsneverashred,the
gain is too low. In the table below, +0 dB 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and
lowfrequencyroll-offsettings.TheUPandDOWNar-
rows 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
values on the various setup screens and to lock out
the control panel. Pressing both arrows simultaneously
entersthelockcountdown.Whenanattemptismade
to change a setting while the control panel is locked, a
message will flash on the LCD reminding you that the
unitislocked.Oncelocked,thebuttonscanonlybe
unlocked by removing the battery, or via the RM remote
control (if the remote function was enabled in the trans-
mitter setup).
Antenna
The transmitter uses a whip antenna with a flexible wo-
ven,galvanizedsteelmeshcableandastandardSMA
connector.
Battery
Compartment
Thumb Screw
Battery
Compartment
Cover Plate
Audio
Input Jack
AUDIO Button
LCD
FREQ Button
Modulation
LEDs
PWR LED
UP Arrow
DOWN Arrow
Antenna
Jack

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 7
Setup Screens
Audio Screen
The Audio screen is used to
adjust input gain from 0 to
+44 dB, and the low fre-
quencyroll-offfrom35to
150Hz.Repeatedlypress-
ing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.
Repeatedly pressing the
FREQbuttontogglesbetweenthetwodisplays.Press
andholdtheFREQbuttonandusetheUpandDown
arrows to select the frequency.
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.Whenthetimer
reacheszero,thetransmitter’scontrolsarelocked.
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
Remote Control Screens
The transmitters can be
configured to respond to
signals from the RM remote
control unit or to ignore
them. This setting is ac-
cessed by holding down the
Down arrow button while
powering the transmitter on.
Use the arrow keys to tog-gle 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 dis-
playedbrieyonthetransmitter’sLCD,toconrm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 transmitter uses only 20% of the
normal amount of battery drain. 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thesleepmode,thePWRLEDblinksgreeneveryfew
seconds to indicate that the transmitter is asleep and not
turned off.
The RM is not included with SM Series transmitters.
Several “Dweedle tones” can also be downloaded from
the web site at:
http://www.lectrosonics.com/hybrid/rm/rm.html
The dweedle tones can be played back through an MP3
player, PDA, etc., and in most cases, will even work with
walkie talkies. The tones will not work through the loud-
speakers of a sound system because the reflections
and reverberation in the room will alter the tones.

SMQV
LECTROSONICS, INC.
8
Power Up and Boot Sequence
1) Ensurethatgoodbatteriesareinstalledintheunit.
2)SimultaneouslypressandholdtheAUDIOand
FREQbuttonsuntilthePowerOnBootSequenceis
initiated.Astheunitturnson,theModulationLEDs
andPWRLEDallglowred,thengreen,andthen
reverttonormaloperation,TheLEDsglowaccord-
ing to the audio level present at the Audio Input Jack
andthePWRLEDglowsgreen(withgoodbatteries).
The LCD displays a bootup sequence which con-
sists of four screens:
Company Name: Lectro
Frequency Block (bXX) and
Firmware Version (rX.X): b21r1.1 (typ)
Power Level Pr 250
Compatibility Mode: CP 400 (typ)
Audio: Aud 12 (typ)
Power Down
Initial Power Off
Timer Screen
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.
Operating Instructions
AUDIO
Button
FREQ
Button
Modulation LEDs
PWR LED
TheSMQVtransmitterispoweredbytwoAAbatteries.
Werecommendusinglithiumbatteriesforlongestlife.
Lithium batteries provide over 7.5 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 counter-
clockwise, a few turns until the door will rotate.
2. Insert the new batteries into the housing. The posi-
tive (+) battery terminal goes into the transmitter
first.
3. Align the Battery Cover Plate and tighten the Bat-
tery Cover Plate Thumbscrew.
NOTE:Thermware“remembers”thepower
status when a battery fails, so the transmitter will
be turned on automatically when the battery is
replaced and the previous settings will be enabled.
Two battery
compartments
(SMQV)
Kevlar
covered vent
Battery Installation

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 9
Standby Mode
Standby Screen
Withthepowerturnedoff,
pressingtheAUDIOand
FREQbuttonsbriey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.
Whiletheunitisinthestandbymode,accessthesetup
screensusingtheAUDIOandFREQbuttonsandmake
adjustments using the Up and Down arrows.
Selecting the Compatibility Mode
and Output Power
Power setting
400 Series or Digital
Hybrid Wireless™
compatibility mode
The transmitter will work
with 200 Series, 100 Series
and IFB analog receivers,
plus some other analog
wireless receivers in addi-
tion to the native digital
hybrid mode.
Note: The unit automatically
enters the Standby Mode
with selecting compatibility.
1)Setthereceiver’saudiocontrolstominimum.
2) From a power off condition, hold down the Up
arrow,thensimultaneouslypresstheAUDIOand
FREQbuttons.
3) PresseitherAUDIOorFREQbuttontoselectthe
compatibility screen and use the Up and Down ar-
rows to select the desired mode.
The following Compatibility Modes are available:
 •100Seriesmode: CP100
 •200Seriesmode: CP200
 •Mode3(contact the factory for details): CP 3
 •400Seriesmode: CP400
 •IFBSeriesmode: CPIFB
 •Mode6(contact the factory for details): CP 6
4) PresseitherAUDIOorFREQbuttontoselectthe
power setting screen and use the Up and Down
down arrows to select the desired level of power.
5) SimultaneouslypresstheAUDIOandFREQbut-
tons to exit this mode and turn off the power.`
Setting Transmitter Operating Frequency
Frequency displayed
in MHz
Frequency displayed as
two-digit hexadecimal
number
The frequency can be
displayedeitherinMHzor
asatwo-digithexadecimal
number and can be set in
the Standby Mode or when
the transmitter is powered
up. The hexadecimal
numbering system is unique
to Lectrosonics where two
alphanumeric characters
correspond to the left and
right switch settings on
earlier analog transmitters that had mechanical rotary
switches to adjust frequency.
1) PresstheFREQbuttontoselecteithertheMHZ
screen or the hexadecimal screen.
2) WhileholdingtheFREQbutton,usetheUpor
Down arrow buttons to move the operating fre-
quency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.
Most Lectrosonics receivers with an LCD interface
indicatetheoperatingfrequencybothinMHzandasa
two digit hexadecimal number. In many cases, it is more
convenient to use the two charcter hexadecimal num-
bersratherthanthesixcharacterfrequencyinMHz.
Adjusting the Low Frequency Roll-off
RepeatedlypresstheAUDIObuttonuntiltheLFroll-
off adjustment screen appears. Then press and hold
theAUDIObuttonwhileselectingthedesiredroll-off
frequencywiththeUPandDOWNarrows.
Theroll-offfrequencycanbesetto35,50,70,100,120
and150Hz.

SMQV
LECTROSONICS, INC.
10
Adjusting Audio Level (Gain)
ThecontrolpanelModulationLEDsindicatetheaudio
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 (gain)
is adjusted with the unit in the Standby Mode or while
poweredupwhileobservingtheLEDs.
It is desirable to to set the gain so that some limiting
occurs on louder peaks. The limiter is very transparent
and its effect is not audible until the system is close to
overload.Inotherwords,don’tbeshyaboutturningup
the gain. In fact, it is a good idea to turn the gain up to
maximum and listen for distortion or compression to get
a feel for how much headroom the system actually has.
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
gain settings, 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transmitterpoweredoff,pluginthemi-
crophone and make sure the connector is firmly
seated.
Warning: If the systems is powered up while
connected to a live sound system, be careful
to turn the sound system level down first or
severe feedback can occur.
2) Place the transmitter in Standby Mode or turn it on
for normal use.
3) Position the microphone in the location where it will
be used in actual operation.
4) ObservetheModulationLEDswhilespeakingor
singing into the microphone at the same voice level
thatwillbeusedduringuse.WhileholdingtheAU-
DIObutton,presstheUPorDOWNarrowbuttons
untiltheboththe-20and-10LEDsglowgreen,
withthe-20LEDoccasionallyickering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.
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.
Locking or Unlocking the Controls
Control Panel Locked
The Lock mode protects the
transmitter from accidental
changes to its settings.
Simultaneously press both
the Up and Down arrow
buttonstostartthecountdowntimer.Whenthetimer
reacheszero,“Loc”isdisplayedandthecontrolsare
locked. Settings can be reviewed but not changed.
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
using 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.

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 11
1
Pull the sleeve over the connector so the ends of the
connector and sleeve are almost flush.
2
Align the pins on the plug and jack and insert the connector.
4
To remove the connector, pull the sleeve back to expose the
black release button. Press the button to unlatch the plug.
Release button
Attaching and Removing the Microphone
Theexiblesleeveoverthe5-pinplugonthemicro-
phone 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.
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.
Pinch and
squeeze the
sleeve on this end
to work it down
over the flange.
3

SMQV
LECTROSONICS, INC.
12
The wiring diagrams included in this section represent
the basic wiring necessary for the most common types
of microphones and other audio inputs. Some micro-
phones 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
SM Equivalent Input Circuit Wiring
10k
1k
5
4
3
2
1
To Virtual Ground
Audio Amplifier
BIAS
MIC
BIAS SELECT
LINE IN
GND
+30uF
+5 VDC
Servo Bias
Pin 4 to Pin 1 = 0 V
Pin 4 Open = 2 V
Pin 4 to Pin 2 = 4 V
+
To Limiter Control
30uF
500 Ohm
100 Ohm
2.7K
200 Ohm
+
3.3uF
100 Ohm
5-Pin Input Jack Wiring
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.
TA5F Latchlock
Insert
Insulator Strain Relief
TA5F Backshell
with Strain Relief
Remove strain relief if using dust boot
TA5F Backshell
(Strain Relief
removed) 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.
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 illus-
tration 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.)
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tub-
ing on the microphone cable, then slide the Rubber
Boot down over the TA5F connector.

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 13
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.
Microphone Cable Termination
for Non-Lectrosonics Microphones
TA5F Connector Assembly
Mic Cord Stripping Instructions
1
23
4
5
VIEW FROM SOLDER
SIDE OF PINS
0.3"
0.15"
Crimping to Shield and Insulation
Shield
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.
Crimp these
fingers to
contact the
shield
Crimp these
fingers to
clamp the
insulation

SMQV
LECTROSONICS, INC.
14
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 wire-
less 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 dif-
ficulty 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 pos-
sible, or if you are still having problems, capacitors can
be installed on the mic pins inside the TA5F connector
housing.
Install the capacitors as follows: Use 330 pF capaci-
tors. 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.
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 con-
nectortominimizenoisepickup.
3 WIRE MIC2 WIRE MIC
CAPSULE CAPSULE
SHIELD
AUDIO
SHIELD
AUDIO
BIAS
Alternate locations for bypass capacitors
TA5F
CONNECTOR
TA 5F
CONNECTOR
Preferred locations for bypass capacitors

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 15
BALANCED AND FLOATING LINE LEVEL SIGNALS
*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 TA 5F connector.
TA5F
PLUG
XLR JACK
Fig. 7
Compatible Wiring for Both Servo Bias Inputs and Earlier Transmitters:
Simple Wiring - Can ONLY be used with
Servo Bias Inputs:
Wiring Hookups for Different Sources
In addition to the microphone and line level wiring hook-
ups illustrated below, Lectrosonics makes a number of
cables and adapters for other situations such as con-
necting 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.
1
2
3
4
5
PIN
SHIELD
AUDIO 1
2
3
4 5
TA5F
PLUG
3.3 k
1.5 k
2 VOLT POSITIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones such as
Countryman E6 headworn and B6 lavaliere.
Fig. 1
4 VOLT POSITIVE BIAS 2-WIRE ELECTRET
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. 2
SHIELD
TIP
PIN
5
4
3
2
1
SLEEVE
LINE LEVEL
RCA or 1/4” PLUG
AUDIO 1
2
3
4 5
TA5F
PLUG
UNBALANCED LINE LEVEL SIGNALS
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).
Fig. 8
1
2
3
4
5
PIN
SHIELD
AUDIO
1
2
3
4 5
TA5F
PLUG
2.7 k
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
Compatible wiring for microphones
such as negative bias TRAM models.
NOTE: The resistor value can range from 2k to 4k ohms.
Fig. 4
DRAIN (BIAS)
SOURCE (AUDIO)
SHIELD
4 VOLT POSITIVE BIAS 3-WIRE ELECTRET
WITH EXTERNAL RESISTOR
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.
Used for 3-wire lavaliere
microphones that require an
external resistor such as the
Sanken COS-11.
Fig. 5
Fig. 11
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.
Fig. 9
Fig. 3
DPA MICROPHONES (Danish Pro Audio miniature models)
This wiring is for DPA lavalier
and headset microphones.
NOTE: The resistor value can range from 3k to 4k ohms.
Fig. 10
2 VOLT NEGATIVE BIAS 2-WIRE ELECTRET
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. 6
LO-Z MICROPHONE LEVEL SIGNALS
For low impedance dynamic mics or electret
mics with internal battery or power supply.
XLR JACK
Insert 1k resistor in series with pin 3 if attenuation is needed

SMQV
LECTROSONICS, INC.
16
Optional RM Remote Control
The RM unit gives you remote control of SM Series
transmitters using an audible tone delivered to the mi-
crophone. The panel layout is the same as the transmit-
ters. Simply set the desired value or mode on the LCD,
then press the send button to set the transmitter to the
same setting or mode.
Hold the speaker on the RM close to the microphone
when 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
Send Button
Speaker
Whenthe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.
ThesetupscreensareaccessedwiththeAUDIOand
FREQbuttons.Onceonthedesiredscreen,thevalueis
adjustedwiththeUPandDOWNarrowbuttons.
Tochangeatransmitter’ssettingviatheRM,select
thescreenandvalue,thenpresstheSENDbutton
while holding the speaker close to the microphone.
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 micro-
phone and volume settings used.
Onlythespecicfunctiondisplayedisaltered.Forex-
ample,iftheremotecontrolisontheAud(audiolevel/
gain) screen, pressing the send button will set the gain
on the transmitter but will not affect any other setting.
Setup Screens
TheAUDIObuttoncyclesthrough4screens:
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screens,de-
pending 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)
A single AA Lithium battery will operate
the RM for up to several years. Unscrew
the knurled knob for access to the battery
compartment.

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 17
Operating Notes
• Thesensitivitytotheremote
control varies with the trans-
mitter’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transmitteriscongured
to respond to the remote
control, it will do so even if
the buttons are locked.
• Whenthetransmitteris
asleep, it can only be awak-
ened by the remote control,
or by removing and reinsert-
ing the battery.
• Whenthetransmitteris
asleep,thePWRledblinks
green every few seconds.
• Ifaremotecommandissentthatwouldresultin
the same display being shown again on the trans-
mitter (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.
• Ifyouarehavingtroublegettingthetransmitterto
respond,makesureyouaren’tcoveringthespeaker
withyourthumb,and/orturnupthespeakervolume
on the Loud page.
• IftheRMissettoadifferentblocknumberthan
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 hexadecimal number.
• TheaudiosignalfromtheRMwillchangetheset-
tingsofalltransmitterswithinrange.Experiment
with this to prevent accidental changes to another
transmitter during a production.
RM Quick Reference
PowerOn/Off AUDIO+FREQ
SetSMQVaudiolevel Audpage(viaAUDIO)
SleeporWakeSMV SLEEP/unSLPpage(viaAUDIO)
LockorUnlockSMV Loc/unLocpage(viaAUDIO)
AdjustRMvolume Loudpage(viaAUDIO)
SetSMQVchannel(hex) CHpage(viaFREQ)
EnableMHzdisplay b(block)page(viaFREQ)
SetSMQV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 7 of this publication.
The RM should be held close enough to the microphone to
change the settings on the intended transmitter, and not be
loud enough to affect other transmitters nearby.
RM2 Remote Control
A lower cost alternative to the RM, this model provides
remote control of:
• Sleep/Unsleep
• Lock/Unlock
• AudioLevel(gain)
This model operates on a “button cell” battery with a
recessed trim pot (screwdriver adjusted) for the speaker
level control.

SMQV
LECTROSONICS, INC.
18
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.
2) Transmitter not powered up. (See Operating Instructions,
Power UP and Boot Sequence.)
TRANSMITTER PWR LED BLINKS GREEN EVERY FEW SECONDS, TRANSMITTER
DOES NOT RESPOND OTHERWISE 1) Transmitter has been put to sleep by the remote control.
  Eitherusetheremotecontroltowakeitupagainorremove
  andreinsertthetransmitter’sbattery.
AUDIO LEVEL LEDs NOT LIGHTING 1) Gain control set to minimum.
 2) Batteryisdeadorinstalledbackwards.CheckPWRLED.
3) Mic capsule is damaged or malfunctioning.
 4) Miccabledamagedormis-wired.
RECEIVER RF INDICATOR OFF 1) Transmitter not turned on, or is in Standby Mode.
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.
NO SOUND (OR LOW SOUND LEVEL), RECEIVER INDICATES PROPER AUDIO MODULATION
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.
DISTORTED SOUND 1) Transmitter gain (audio level) is far too high. Check audio level
  LEDsandreceiveraudiolevelsduringuse.
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) Transmitter is not set to same frequency as receiver. Check that
operating frequency on receiver and transmitter match.
 4)Receiver/TransmitterCompatibilityModemismatched.
EXCESSIVE FEEDBACK 1) Transmitter gain (audio level) too high. Check gain adjustment
  and/orreducereceiveroutputlevel.
2) Talent standing too close to speaker system.
 3)Micistoofarfromuser’smouth.
Troubleshooting

Super-Minature Belt Pack Transmitter
Rio Rancho, NM 19
SYMPTOM POSSIBLE CAUSE
HISS AND NOISE -- AUDIBLE DROPOUTS 1) Transmitter gain (audio level) far too low.
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.
“Loc” APPEARS IN DISPLAY WHEN ANY BUTTON IS PRESSED
1) Control Panel is locked. (See Operating Instructions, Locking
and Unlocking the Control Panel.)
“Hold” APPEARS IN DISPLAY WHEN ARROW BUTTONS ARE PRESSED
1)ReminderthatitisnecessarytoholddowntheAUDIOorFREQ
button to make adjustments to the audio gain or frequency settings.
“PLL” APPEARS IN DISPLAY 1) Indication that the PLL is not locked. This is a serious condition
that requires factory repair. It may be possible to operate on
another frequency far removed from the one that was selected
when the condition was indicated.
TRANSMITTER WON’T RESPOND TO REMOTE CONTROL
1) If LCD blinks “rc oFF”, transmitter has not been configured
  torespondtotheremotecontrol.See“RemoteControlOperation”
on page 7 for instructions on how to configure.
 2) IfLCDblinks“------”,transmitterisalreadysetas
requested by the remote control.
3) If transmitter does not respond at all, try moving the remote
  controlclosertothemicrophoneorincreasingtheremotecontrol’s
loudness setting, or increasing the audio level on the transmitter.
4) Make sure volume of RM and proximity of microphone are
sufficient to engage transmitter.
5) Make sure transmitter is not in Sleep mode.
RM Troubleshooting
FREQUENCY CHANGES, BUT NOT TO DESIRED FREQUENCY
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.

SMQV
LECTROSONICS, INC.
20
SMKITTA5 Connector kit for SMV series
  transmitters,5-pinTA5Fplugwithsleeve
SMBCDN Machined, wire belt clip for SMV
transmitters, antenna down
Included Accessories
SMV:
Place thermal
insulation pad on
back of unit, as
pictured.
SMBCUPSL Spring-loadedmachined
aluminum clip
35923 Thermal insulated pad
installed on SMV
PSM Leather pouch with
integrated belt clip
Place thermal
insulation pad on
back of unit, as
pictured.
SMDBCSL Spring-loadedmachined
aluminum clip
35924 Themal insulated pad installed
 onSMQV
Place Thermal
insulation pad on
back of unit, as
pictured.
PSMD Leather pouch with
integrated belt clip
SMQV:
Optional Accessories
SMBCUP Machined, wire belt clip for SMV
transmitters, antenna up
SMDBC Machined,wirebeltclipforSMQV
and transmitters