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LR
Compact Receiver
TECHNICAL DATA
• Tunes over a 75 MHz range*
• Tracking front-end filters
• Digital Hybrid Wireless® with compatibility
modes for use with earlier transmitters
• Compact size powered by two AA batteries
or an optional battery eliminator
• LCD with RF spectrum scanning
• SmartSquelch
filtering and squelch
• DSP-based pilot tone for squelch control
• USB port for firmware updates
• IR sync port for transmitter setup
Excellent performance in a small package for ENG and
DSLR video production is the purpose and intent of
the LR receiver design. Tracking front-end filters block
interference from high powered RF signals on nearby
channels to preserve the extended operating range. RF
spectrum scanning displays accurate results on the LCD
to make finding clear spectrum quick and easy.
The receiver is powered by internal AA batteries or with
an optional battery eliminator. The top panel includes
an IR port for transmitter setup. Firmware updates are
enabled via a USB port on the side panel. The housing is
made from a solid machined aluminum billet.
TM
DSP-controlled, noise based
Digital Hybrid Wireless® is a patented design
that combines 24-bit digital audio with an
analog FM radio link to provide outstanding
audio quality and the extended operating
range of the finest analog wireless systems.
The design overcomes channel noise in a
dramatically different 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.
Instead, it is a technique which can be accomplished only in the digital domain, even
though the audio inputs and outputs are
analog signals.
*US Patent 7,225,135
*Tuning range varies slightly in different bands
A machined aluminum, hinged door maintains
reliable contact with the batteries
Rio Rancho, NM, USA
www.lectrosonics.com
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Specifications
Operating Frequencies:
Band A1: 470.100 - 537.575 MHz
Band B1: 537.600 - 614.375 MHz
Band C1: 614.400 - 691.175 MHz
Frequency selection steps: Selectable; 100 kHz or 25 kHz
Receiver Type: Dual conversion, superheterodyne
IF Frequencies: 243.950 MHz and 250.000 kHz
Frequency stability: ±0.001 %
Front end bandwidth: 20 MHz @ -3 dB
Sensitivity
20 dB SINAD: 1.0 uV (-107 dBm), A weighted
60 dB Quieting: 2.2 uV (-100 dBm), A weighted
Squelch quieting: Greater than 100 dB typical
Modulation acceptance: +/-100 kHz max.; varies with selected
compatibility mode
Image and spurious rejection: 85 dB
Third order intercept: 0 dBm
Diversity method: SmartDiversityTM phased antenna
combining
FM detector: Digital Pulse Counting Detector
RF spectrum analyzer: Single and multiple block scanning modes;
coarse and fine views of results
Antenna inputs: 50 Ohm; SMA female connectors
Audio output: TA3 male (mini XLR) balanced output
Audio output level: Adjustable -50 to +5 dBu in 1 dB steps;
unbalanced output level is 6 dB lower
Front panel controls
and indicators: • Sealed panel with membrane switches
• LCD for setup menus and monitoring
Audio test tone: 1 kHz, -50 dBu to +5 dBu output (bal);
1% THD
Transmitter battery type
selection: AA alkaline or lithium; timer available for
use with alkaline, lithium and HiMH
Audio polarity selection: Normal or inverted
Compatibility modes: • Digital Hybrid (North American and
European)
• Lectrosonics 100, 200 and 300 Series
• Lectrosonics IFB
• Non-Lectrosonics modes 3, 6 and 7
(contact the factory for details)
SmartNR (noise reduction): OFF, NORMAL, FULL modes
(available in Digital Hybrid mode only)
System frequency response: 32 Hz to 20 kHz (+/- 1 dB) receiver only
(see transmitter documentation for overall
system response)
Signal to noise ratio:
Note: The dual envelope “soft”
limiter provides exceptionally
good handling of transients
using variable attack and
release time constants.
Once activated, the limiter compresses 30+ dB of transmitter input range into
4.5 dB of receiver output range, thus reducing the measured figure for SNR
without limiting by 4.5 dB
Total harmonic distortion: <0.4 (0.2% typical in Digital Hybrid mode)
Top panel features: • TA3M audio output jack;
• (2) SMA antenna jacks
• IR (infrared) port
Operating runtimes: 4 hours, (Duracell Quantum Alkaline)
Operating temperature: -20° C to +50°C
Weight: 185.4 grams (6.54 ozs.) with two AA lithium
batteries
Dimensions (housing): 3.21 x 2.45 x .84 in. (82 x 62 x 21 mm)
Specifications subject to change without notice
SmartNR No Limiting w/Limiting
OFF 103.5 108.0
NORMAL 107.0 111.5
FULL 108.5 113.0
Top panel provides antenna ports, IR interface
and balanced audio output. The belt clip also
attaches the shoe mount adapter.
USB port
581 Laser Road NE • Rio Rancho, NM 87124 USA • www.lectrosonics.com
(505) 892-4501 • (800) 821-1121 • fax (505) 892-6243 • sales@lectrosonics.co
4 January 2017
LR_td.indd Prelim
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