Lectrosonics L-Series LMb Bodypack Wireless Transmitter C1: 614 to 691 MHz
Lectrosonics L-Series LMb Bodypack Wireless Transmitter C1: 614 to 691 MHz
The LMb transmitter can be configured to operate as a “one touch” device with a single power on/off switch on the top panel, or with full access to all operational parameters using the side panel membrane switches and LCD interface. The top panel switch can also be configured to provide a mute or talkback function.
This versatility makes the transmitter at home in a wide variety of applications from video production to theater, stage and house of worship.
Along with providing peerless audio quality with wide frequency response and dynamic range in Nu Hybrid mode, the technology used in the LMb includes compatibility modes for Lectrosonics Mode 3 and IFB receivers.
LMB DATA SHEET
The LMb from Lectrosonics is a digital hybrid wireless bodypack 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.
- For Broadcast, EFP and ENG Applications
- 75 MHz Tuning Range
- Digital Hybrid Wireless
- 50 mW RF Power
- Mic and Line Inputs
- Fixed Antenna
- LCD Backlit Screen
- Multi-Function Switch for Mute/Talkback
- Rugged Machined-Aluminum
Channel
C1
Frequency Range
614.400 to 691.175 MHz
Frequency Selection
Steps: Selectable 25 or 100 kHz
RF Power Output
50 mW
Pilot Tone
25 to 32 kHz, 5 kHz deviation (Digital Hybrid mode)
Frequency Stability
± 0.002%
Deviation
± 75 kHz max. (Digital Hybrid mode)
Spurious Radiation
60 dB below carrier
Equivalent Input Noise
-120 dBV (A-weighted)
Input Level
Nominal 2 mV to 300 mV, before limiting
Greater than 1 V maximum, with limiting
Input Impedance
2 kOhms
Input Limiter
DSP controlled, dual envelope "soft" limiter with greater than 30 dB range
Gain Control Range
44 dB, digital control
Modulation Indicators
Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulation
LCD bar graph
Audio Performance
Frequency Response
90 Hz to 20 kHz (+/-1 dB)
Low Frequency Roll-Off
-12 dB/octave, 70 Hz
THD
0.2% (typical)
SNR at Receiver Output
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
Switch Controls
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
Audio Input Jack
1x Switchcraft 5-pin locking (TA5F)
Antenna
Galvanized steel, flexible wire
Battery
2x AA alkaline, lithium, NiMh rechargeable
Battery Life
Alkaline: 4.5 hours
Duracell Quantum: 7 hours
Eneloop 2400 mAH NiMH: 8 hours
Dimensions
81 x 61 x 20 mm
Weight
141 g including lithium AA batteries and wire belt clip
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