Lectrosonics LT Beltpack Transmitter (B1: 537.600 to 614.375 MHz

Model #LT-B1

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Packaging Info

Box Dimensions (LxWxH) 9.8 x 7.8 x 3.0"
Package Weight 1.05 lb

General Information

Frequency Selection Steps: Selectable 25 or 100 kHz
RF Power Output 50 or 100 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 Mic: Nominal 2 to 300 mV, before limiting Greater than 1 V maximum, with limiting Instrument: 1 MOhm high level
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
Channel B1
Frequency Range 537.600 to 614.375 MHz

Audio Performance

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 Duracell Quantum: 4.75 hours Eneloop 2400 mAH NiMH: 6 hours
Additional Ports USB on side panel for firmware updates
Dimensions (L x W x H) 2.85 x 2.45 x 0.75" (72 x 62 x 19 mm)
Weight 5.9 ounces (169 grams), with alkaline AA batteries
Low Frequency Roll-Off -12 dB/octave, 70 Hz
Frequency Response 90 Hz to 20 kHz (+/-1 dB)
Product Highlights
  • For Broadcast, EFP and ENG Applications
  • 75 MHz Tuning Range
  • Digital Hybrid Wireless
  • Selectable 50 or 100 mW Power
  • Responds to Commands from Smartphone App
  • Mic and Line Inputs
  • Detachable Antenna
  • LCD Backlit Screen
  • Multi-Function Switch for Mute/Talkback
  • Rugged Machined Aluminum
In The Box
  • Lectrosonics LT Beltpack Transmitter (B1: 537.600 to 614.375 MHz
  • Limited 1-Year Warranty
Still Have Questions?
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