Lectrosonics SMQV/X Handleiding


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SMV Series
Miniature Transmitters
TECHNICAL DATA
Rio Rancho, NM, USA
www.lectrosonics.com
Digital Hybrid Wireless® is a revolutionary new design
that combines digital audio with an analog FM radio link
to provide outstanding audio quality and the exemplary
RF performance of the finest analog wireless systems.
This overcomes 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 pro-
prietary algorithm is not a digital implementation of an
analog compandor. Instead, it is a technique which can
be accomplished only in the digital domain.
The process eliminates compandor artifacts, expand-
ing the applications to include test and measurement of
acoustic spaces and musical instruments.
*US Patent 7,225,135
To meet the demand for both extended operating
range and extended battery life, the “V” series SM
transmitters offer selectable output power ranging
from 50, 100 and 250 mW (941 offers 50 or 100 mW)
on the single and dual battery model. With higher
power output, the operating range is improved at the
expense of battery life. When range is not an issue,
the power can be reduced to extend the battery life.
Both models are compatible with the LectroRM app
for setup and adjustment using audible hands free
tones delivered into the microphone from a mobile
phone. The transmitter can be put to sleep to con-
serve battery power during setup while the transmitter
is buried deep inside costuming, then awakened for
normal operation when the production begins. Other
features include frequency and audio level adjustment
and control lockout.
Selectable output power to maximize
battery life or operating range
Ultra-lightweight, corrosion resistant
housing
Water resistant seals for use in damp
environments
LCD interface with lockout option
Programmable compatibility modes
for use with a wide variety of different
receivers
Servo Bias input circuitry with
selectable voltage
The input section features the unique servo bias
input circuitry with a standard TA5M type jack for
use with electret lavaliere mics, dynamic mics, or line
level signals. A DSP-controlled analog audio limiter
is employed ahead of the first mic preamp to protect
the entire audio chain from overload. The limiter has
a range of more than 30 dB for excellent overload
protection and a dual release envelope that makes
the limiter acoustically transparent while maintaining
low distortion. The limiter recovers quickly from brief
transients, with no distortion.
A water resistant control panel with LCD, membrane
switches and multi-color LEDs make input gain adjust-
ments, frequency and compatibility mode selection
quick and accurate. The battery compartment accepts
AA batteries (Lithium recommended).
The housings are machined from solid aluminum
blocks to provide an extremely lightweight and rugged
package. A special non-corrosive finish resists salt
water exposure and perspiration in extreme environ-
ments.
SMQV, SMQV-941, SMQV/X Dual Battery Models
SMV, SMV-941, SMV/X Single Battery Models
High Power Output and Long Battery Life
Variable power provides the choice of maximum power
output for extended operating range and interference
suppression, or lower power output for extended bat-
tery life when operating in less demanding RF condi-
tions.
Adjustable Low Frequency Roll-o
The low frequency roll-off can be set for 3 dB down
points at 35, 50, 70, 100, 120 or 150 Hz to control sub-
sonic and very low frequency audio content.
30 100 1kHz 10k 20k
+6
+3
0dB
-3
-6
-9
-12
Line in
Mic in 150 Hz
Roll-off
Mic in 35 Hz
Roll-off
DSP-Based Pilot Tone & Compatibility
The DSP generated pilot tone eliminates the need for
fragile crystals and allows a different pilot tone fre-
quency for each of the carrier frequencies in the tuning
range of the wireless system. Individual pilot tones
significantly reduce squelch problems in multichannel
systems where a pilot tone signal can appear in the
wrong receiver via intermodulation products.
Input Limiter
A DSP-controlled analog audio limiter is employed
before the analog-to-digital converter. The limiter
has a range of more than 30 dB for excellent over-
load protection. A dual release envelope makes the
limiter acoustically transparent while maintaining
low distortion. The limiter recovers quickly from brief
transients, so that its action is hidden from the lis-
tener, but recovers slowly from sustained high levels,
to keep audio distortion low and preserve short term
dynamic changes.
The bicolor LEDs accurately indicate limiter activity
to assist in setting the input gain for optimal signal to
noise ratio and dynamic range.
Circulator/Isolator
The transmitter RF output circuit includes a special-
ized RF device called acirculator/isolator” or simply
“isolator” using a magnetically polarized ferrite to
allow RF signals to pass through to the antenna, but
block them from coming backward into the transmitter
output section.
This greatly reduces RF intermodulation produced in
the transmitter output stages when multiple units are
used in close proximity (a few feet apart). The isolator
also helps protect the output stage from electrostatic
shock delivered to the antenna. Isolators are com-
mon in broadcast and commercial applications, but
because of their high cost it is unusual to find them in
wireless microphone systems.
GORE-TEX® Vent
In special circumstances it is possible for moisture
to be pulled into the housing when a unit is moved
from a warm, damp operating environment, turned
off and stored in a cool place. As the warm air inside
the unit cools a vacuum is created, pulling air in past
the exterior of the housing, bringing moisture with it.
SMV Series Transmitters Block Diagram
Variable 1.8 - 4v
+6V
+5V 5V
Regulator
X1
11.289 MHz
X2
12.000 MHz
LectroRM
By New Endian LLC
LectroRM is a mobile application for iOS and Android
operating systems. Its purpose is to remotely control
Lectrosonics Transmitters, including:
• SM Series
• WM
• L Series
The app remotely changes settings on the transmitter
through the use of encoded audio tones, which when
received by the attached microphone, will alter the
configured setting. The app was released by New En-
dian, LLC in September 2011. The app is available for
download and sells for $20 on the Apple App Store and
Google Play Store.
LectroRM’s remote control mechanism is the use of an
audio sequence of tones (dweedles) that are interpret-
ed by the transmitter as a configuration change. The
settings available in LectroRM are:
• Audio Level
• Frequency
• Sleep Mode
• Lock Mode
Activation
For a transmitter to respond to remote control audio
tones, the transmitter must meet certain requirements:
• The transmitter must not be turned off; it can
however be in sleep mode.
• The transmitter must have firmware version
1.5 or later for Audio, Frequency, Sleep and
Lock changes.
• The transmitter microphone must be
within range.
The transmitter must be configured to enable
remote control activation.
Please be aware this app is not a Lectrosonics
product. It is privately owned and operated by
New Endian LLC, www.newendian.com.
User Interface
The user interface involves selecting the audio se-
quence related to the desired change. Each version
has an interface for selecting the desired setting
and the desired option for that setting. Each version
also has a mechanism to prevent accidental activa-
tion of the tone.
iOS
The iPhone version keeps each available setting on
a separate page with the list of options for that set-
ting. On iOS, the “Activate” toggle switch must be
enabled to show the button which will then activate
the audio. The iOS version’s default orientation is
upside-down but can be configured to orient right-
side up. The purpose for this is to orient the device’s
speaker, which is at the bottom of the device, closer
to the transmitter microphone.
Android
The Android version keeps all settings on the same
page and allows the user to toggle between the
activation buttons for each setting. The activation
button must be long pressed to activate. The
Android version also allows users to keep a configu-
rable list of full sets of settings.


Product specificaties

Merk: Lectrosonics
Categorie: Niet gecategoriseerd
Model: SMQV/X

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