Lectrosonics DBu Digital Belt-Pack Transmitter

Incorporating a 4th-generation digital audio design, the DBu transmitter from Lectrosonics is a member of their D² family, and features specially-developed, high-efficiency digital circuitry that helps extend operating time using 2 AA batteries. It has the capability for tuning in both coarse or fine steps across the UHF television band from 470 to 608 MHz (470-614 MHz for export versions), and with a selectable power output either of 25 or 50 mW. The unit's pure digital architecture enables AES 256-CTR encryption for high-level security use.

High-quality preamp components, along with a wide-range input gain adjustment and DSP-controlled limiting all assure studio-quality audio performance, plus input connections and settings are included for any lavaliere microphone, as well as dynamic microphones and line-level inputs. Input gain is adjustable over a 44 dB range in 1 dB steps to allow a precise match to the input signal level, and thus maximizing the system's dynamic range and signal-to-noise ratio.

Features

• 24-bit/48 kHz digital conversion
• Tunes across entire UHF frequency range
• 256-bit encryption - AES 256-CTR
• Selectable RF power at 25 and 50 mW
• USB port for firmware updates
• Wide range input gain adjustment
• DSP-controlled input limiter
• 2-AA battery powered
• Solid-machined aluminum housing

Specifications

• Operating Frequencies: 470.100 - 607.950 MHz
• Frequency Selection Steps: 25 kHz
• RF Power output: Selectable; 25 or 50 mW
• Frequency Stability: ± 0.002%
• Digital Modulation: 8PSK
• Equivalent input noise: –128 dBV
• Input level:
  • Nominal 2 mV to 300 mV, before limiting
  • Greater than 1V maximum, with limiting.
• Input impedance:
  • Mic: 300 Ohm
  • Line: 2k Ohm
• Input limiter: Dual envelope type; 30 dB range
• Gain control range: 44 dB in 1 dB steps; digital control
• Modulation indicators:
  • Dual bicolor LEDs indicate modulation of -20, -10, 0 and +10 dB referenced to full modulation
  • LCD bar graph
• Controls:
  • Top panel toggle switch; programmable as power, mute or none (off) function
  • Side panel membrane switches with LCD interface for power on/off and all setup and configuration controls
• Audio Input Jack: Switchcraft 5-pin locking (TA5F)
• Antenna: Galvanized steel, flexible wire
• Battery: Two AA Duracell Quantum recommended
• Battery Life: 5 hours; Duracell Quantum alkaline
• Weight: 6.24 ounces (177 grams), including two AA batteries and wire belt clip
• Dimensions: 3.2 x 2.5 x .74 in. (86 x 62 x 19 mm)