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Lectrosonics L Series LMb and LT Transmitters lectrosonics lectrosonics
Hands-On Review : Lectrosonics L-Series Wireless System
The LMb from Lectrosonics is a digital hybrid wireless beltpack transmitter with 75 MHz tuning bandwidth and 50 mW RF power. When paired with a mic and receiver, it can be used to capture audio for applications such as broadcast TV, theater, houses of worship, live stage, and more.
The LMb has several other features to help you obtain good clear audio, such as 25 or 100 kHz tuning steps, a compatibility mode to ensure analog receivers will work well with the transmitter, a microphone input allowing you to use mic or line level inputs. When combined with the optional MI39-type instrument interface cable (sold separately), the LMb transmitter can be used as a musical instrument transmitter for guitar, bass or portable keyboard.
In addition, the durable LMb transmitter is enclosed in machined-aluminum housing and is built with a fixed antenna. A multi-function toggle switch allows audio muting, power on/off, or talkback (when used with the SRb or Venue receivers). A LCD and membrane switch interface make the LMb transmitter easy to setup and simple to use. This transmitter operates on the C1 channel between 614.400 to 691.175 MHz.
In the Box
Lectrosonics LMb Digital Hybrid Wireless Beltpack Transmitter (C1: 614.400 to 691.175 MHz)
Limited 1-Year Warranty
Table of Contents
614.400 to 691.175 MHz
Steps: Selectable 25 or 100 kHz
RF Power Output
25 to 32 kHz, 5 kHz deviation (Digital Hybrid mode)
± 75 kHz max. (Digital Hybrid mode)
60 dB below carrier
Equivalent Input Noise
-120 dBV (A-weighted)
Nominal 2 mV to 300 mV, before limiting Greater than 1 V maximum, with limiting
DSP controlled, dual envelope "soft" limiter with greater than 30 dB range
Gain Control Range
44 dB, digital control
Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulation LCD bar graph
SmartNR: Off 103.5 (no limiting) 108.0 (with limiting) Normal: 107.0 (no limiting) 111.5 (with limiting) Full: 108.5 (no limiting) 113.0 (with limiting)
Note: The dual envelope "soft" limiter provides 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
Top panel slide switch; programmable as power, mute, talkback or no (off) function Side panel membrane switches with LCD interface for power on/off and all setup and configuration controls