Lectrosonics Digital Hybrid Wireless Beltpack Transmitter (B1: 537.600 to 614.375 MHz)
Product Highlights
- 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
Lectrosonics LMb Digital Hybrid Wireless Beltpack Transmitter (B1: 537.600 to 614.375 MHz)
Lectrosonics Digital Hybrid Wireless Beltpack Transmitter (B1: 537.600 to 614.375 MHz)
Lectrosonics LMB-B1 - Digital Hybrid Wireless Beltpack Transmitter (B1: 537.600 to 614.375 MHz)
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 B1 channel between 537.600 to 614.375 MHz.
| Channel |
B1 |
| Frequency Range |
537.600 to 614.375 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 (L x W x H) |
3.2 x 2.4 x .8" (81 x 61 x 20 mm) |
| Weight |
5 oz (141 g), including lithium AA batteries and wire belt clip |
