SMV Series

SMV Series
SMV Series
Super Miniature Variable Power Transmitters
With Digital Hybrid Wireless® Technology
US Patent 7,225,135
Dual Battery Model
Fill in for your records:
Serial Number:
Purchase Date:
Rio Rancho, NM, USA
Super-Minature Belt Pack Transmitter
General Technical Description
Servo Bias Input
No Pre-Emphasis/De-Emphasis
The voltage and current requirements of the wide variety of electret microphones used in professional applications 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 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 (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 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.
Because it uses an analog FM link, the Digital Hybrid
system enjoys all the benefits of conventional FM wireless systems and it does away with the analog compandor and its artifacts.
The Digital Hybrid design results in a signal-to-noise ratio
high enough to preclude the need for conventional preemphasis (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
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 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 while preserving
short term dynamics.
Variable 1.8 - 4v
Rio Rancho, NM
SMV Series
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 squelch in
the receiver. A pilot tone squelch system provides a reliable 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 different 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 Compatibility Mode and that the correct pilot tone is added to the
encoded signal.
Compatibility Modes
SM transmitters are 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 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.
Battery Options and Operating Time
Switching power supplies convert regulated battery voltages to operate various circuit stages with maximum
The firmware “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.
Frequency Blocks
Lectrosonics established a “block” numbering system
years ago to organize the range of frequencies available 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 special band between 944 and 952 MHz.
The RF output circuit includes a one way circulator/isolator 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
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.
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 transmitter is turned off.
Super-Minature Belt Pack Transmitter
Controls and Functions
Modulation LEDs
Cover Plate
UP Arrow
Input Jack
Thumb Screw
DOWN Arrow
AUDIO Button
FREQ Button
LCD Screen
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. When the LED begins to blink red, there are only a
few minutes of life.
The exact point at which the LED turns red will vary
with battery brand and condition, temperature and current drain. The LED is intended to simply catch your
attention, not to be an exact indicator of remaining time.
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 flash red during use. If the LEDs never flash red, the
gain is too low. In the table below, +0 dB indicates full
Signal Level
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.
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.
-20 LED
-10 LED
Less than -20 dB
-20 dB to -10 dB
-10 dB to +0 dB
+0 dB to +10 dB
Greater than +10 db
AUDIO Button
The AUDIO button is used to display the audio level and
low frequency roll-off settings. 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 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.
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.
Hours 2
A weak battery will sometimes cause the PWR LED to
glow green immediately after the transmitter is turned
on, but will soon discharge to the point where the LED
will turn red or the unit will turn off completely.
The transmitter uses a whip antenna with a flexible woven, galvanized steel mesh cable and a standard SMA
Audio Input Jack
The Servo Bias input circuitry 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.
Rio Rancho, NM
SMV Series
Battery Installation
We recommend using lithium batteries for longest life.
Refer to the battery life listings in the specifications.
Batteries are inserted (+) end first on both single and
double battery models.
To install new batteries:
1. Turn the Battery Cover Plate Thumbscrew counterclockwise a few turns until the door will rotate. If
you continue to rotate the thumbscrew, the door will
separate from the transmitter.
2. Insert the new batteries into the housing. The positive (+) battery terminal goes into the transmitter
3. Align the Battery Cover Plate and tighten the Battery Cover Plate Thumbscrew. Apply pressure to the
cover plate to press the batteries into the housing
while rotating the thumbscrew to tighten the cover
plate flush to the housing.
engraved into
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. The flange around the rim of the connector on the transmitter helps retain the sleeve after it is
installed and
The following procedure simplifies the attachment and
removal of the microphone to assure the sleeve is
seated securely.
Align the pins on the plug and jack and insert the connector.
If the sleeve is pulled down
and covering the connector,
squeeze the end of the sleeve
so you can feel the connector
inside and press it into the jack
until it latches.
covered vent
Pinch and
squeeze the
sleeve on this end
to work it down
over the flange.
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.
To remove the connector, pull
the sleeve back to expose the
black release button. Press
the button to unlatch the plug.
Release button
Two battery
Super-Minature Belt Pack Transmitter
Operating Instructions
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
LCD Backlight Settings
The LCD backlight can be set to turn off after either 5
minutes or 30 seconds or stay on continuously. Hold
the UP arrow in while powering up the unit to enter
the setup screen. Press the AUDIO button repeatedly
to step through the setup items to reach the backlight
settings screen. Use the UP or DOWN arrow button to
select the desired setting.
The count will progress from 1
through 3 and the unit will then
power up with the RF output
turned on. During this turn on sequence, the
modulation and power LEDs all glow red, then
green, and then revert to normal operation.
The LCD displays a bootup sequence which consists of four screens:
Company Name:
Frequency Block (bXX) and
Firmware Version (rX.X):
b21r1.1 (typ)
Power Level
Pr 250
Compatibility Mode:
CP 400 (typ)
Aud 12 (typ)
Selecting the Compatibility Mode
and Output Power
400 Series or Digital
Hybrid Wireless™
compatibility mode
Power Down
Power setting
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.
Standby Mode
With the power turned off,
pressing the AUDIO and
FREQ buttons briefly places
the unit in Standby Mode. In
Standby Screen
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.
The transmitter will work with
200 Series, 100 Series and
IFB analog receivers, plus
some other analog wireless
receivers in addition to the
native digital hybrid mode.
Note: The unit
automatically enters the
Standby Mode when
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 arrows to select the desired
Power Restore Screens
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:
• 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 buttons to exit this mode and turn off the power.`
Rio Rancho, NM
SMV Series
Audio Screen
The Audio screen is used to
adjust input gain from 0 to
+44 dB, and the low frequency roll-off 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.
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
The transmitters can 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
Remote Control Screens
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 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
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:
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 loudspeakers of a sound system because the reflections
and reverberation in the room will alter the tones.
Configuring for Power Restore
When using external power source through a battery
eliminator, Power Restore will return your transmitter to
settings it had before it was powered off. This eliminates
the need to power on through the unit itself.
1) Press and hold the Down Arrow Button then power
on the transmitter by pressing the
Audio and Freq buttons simultaneously.
2) The LCD will display the status, either “rc ON” or “rc
OFF.” Press “AUDIO” or “FREQ” key to scroll to the
“PbAc setup screen
• PbAc 1 for power restore ON
• PbAc 0 for power restore OFF
3) When power restore is set to ON, the unit will turn
on whenever power is present at the battery terminals until the power is manually turned off with the
control panel switches.
NOTE: The firmware “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.
Power Up and Boot Sequence
Super-Minature Belt Pack Transmitter
Setting Transmitter Operating Frequency
The frequency can be
displayed either in MHz or
as a two-digit hexadecimal
number and can be set in
Frequency displayed
the Standby Mode or when
in MHz
the transmitter is powered
up. The hexadecimal
numbering system is unique
to Lectrosonics where two
Frequency displayed as
alphanumeric characters
two-digit hexadecimal
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 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.
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 numbers 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.
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.
Rio Rancho, NM
It is actually a good idea to turn the gain up to maximum and listen for distortion or compression to get a
feel for how much headroom is available.
Signal Level
-20 LED
-10 LED
Less than -20 dB
-20 dB to -10 dB
-10 dB to +0 dB
+0 dB to +10 dB
Greater than +10 db
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 microphone and make sure the connector is firmly
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 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.
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
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.
Control Panel Locked
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
Microphone RF Bypassing
Line Level Signals
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.
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.
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
Preferred locations for bypass capacitors
Alternate locations for bypass capacitors
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.
Rio Rancho, NM
SMV Series
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.
1) Battery is inserted backwards or dead.
2) Transmitter not powered up. (See Operating Instructions,
Power UP and Boot Sequence.)
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.
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.
Transmitter not turned on, or is in Standby Mode.
Transmitter battery is dead.
Receiver antenna missing or improperly positioned.
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.
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.
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.
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.
Super-Minature Belt Pack Transmitter
Transmitter gain (audio level) far too low.
Receiver antenna missing or obstructed.
Transmitter antenna broken or missing.
Operating range too great.
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.
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.
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
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.
Rio Rancho, NM
SMV Series
Specifications and Features
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
614.100 - 614.300
Low frequency roll-off:
(Frequency usage varies by country)
Frequency range:
256 frequencies in 100 kHz steps
for one 25.5 MHz wide block
Channel Spacing:
100 kHz
Frequency selection:
Control panel mounted membrane switches
RF Power output: Switchable; 50, 100 or 250 mW
Compatibility Modes (6)
Digital Hybrid Wireless® (400 Series),
200 Series, 100 Series, Mode 3 , Mode 6, IFB
Pilot tone:
25 to 32 kHz; 5 kHz deviation
(in 400 Series Mode)
Frequency stability:
± 0.002%
± 75 kHz max. (in 400 Series Mode)
Spurious radiation:
60 dB below carrier
Equivalent input noise:
–125 dBV, A-weighted
Input level:
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.
Input impedance:
Dynamic mic: 300 Ohms
Electret lavaliere: Input is virtual ground with servo adjusted
constant current bias
Line level: 2.7 k Ohms
Input limiter:
DSP Controlled Soft limiter, 30 dB range
Bias voltages:
Fixed 5 V at up to 5 mA
Selectable 2 V or 4 V servo bias for any
electret lavaliere.
Gain control range:
44 dB; panel mounted membrane switches
Modulation indicators:
Dual bicolor LEDs indicate modulation of
–20, -10, 0, +10 dB referenced to
full modulation.
Control panel with LCD and four membrane
The FCC requires that the following statements be
included in this manual for the SMV and SMQV:
For body worn operation, this transmitter models 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
Adjustable from 35 to 150 Hz.
Block 24 614.400 - 639.900
Block 25 640.000 - 665.500
Block 26 665.600 - 691.100
Mic in 35 Hz
Line in
Mic in 150 Hz
Audio Frequency Response:
35 Hz to 20 kHz, +/-1 dB (The low frequency
roll-off is adjustable - see graph above)
Signal to Noise Ratio (dB):
No Limiting
(overall system, 400 Series mode) OFF
(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:
Audio Input Jack:
Antenna:Flexible, unbreakable steel cable.
0.2% typical (400 Series mode)
Switchcraft 5-pin locking (TA5F)
1.5 Volt AA lithium
Battery Life:
SMV 50 mW (1 AA):
7.25 hrs
SMV 100 mW (1 AA):
5.5 hrs
SMV 250 mW (1 AA):
3 hrs
SMQV 50 mW (2 AA):
14.5 hrs
SMQV 100 mW (2 AA):
14 hrs
SMQV 250 mW (2 AA):
7.5 hrs
RM: 2.3 oz.. (65.8 grams) with lithium battery
SMQV: 3.7 oz.. (105 grams) with lithium batteries
Overall Dimensions:
RM: 2.3 x 1.8 x 0.64 inches
(not including microphone/lanyard)
58 x 46 x 16 mm
(not including microphone/lanyard)
RM2: 2.125 x 1.25 x 1.125 inches
(not including microphone/lanyard)
54 x 32 x 29 mm
(not including microphone/lanyard)
SMV: 2.3 x 1.8 x 0.64 inches
(not including microphone/lanyard)
58 x 46 x 16 mm
(not including microphone/lanyard)
SMQV: 2.3 x 2.4 x 0.64 inches
(not including microphone)
58 x 60 x 16 mm
(not including microphone)
Emission Designator: 180KF3E
Specifications subject to change without notice.
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.
This device complies with Industry Canada radiation exposure
limits as set forth for a controlled “professional” use only.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF