Lectrosonics DBU, DIGITAL ENCRYPTED BELTPACK TX

Lectrosonics DBU, DIGITAL ENCRYPTED BELTPACK TX

The Lectrosonics DBu transmitter is a fourth-generation design featuring highly efficient digital circuitry that delivers extended operating time from just two AA batteries. It provides flexible UHF tuning across the 470–608 MHz television band, with export versions supporting 470–614 MHz. Users can select either 25 or 50 mW of RF output power, while the transmitter’s fully digital architecture supports AES-256-CTR encryption for applications requiring a high level of audio security. The top panel provides convenient access to the antenna connector, audio input level indicators, programmable function switch, and audio input connector. Red and green LED indicators display audio levels from -20 dB through the onset of limiting, making it easy to set input gain accurately. The programmable switch can be assigned to several functions, including audio mute, power on/off, or talkback, or it can be disabled when not required. The DBu delivers studio-quality audio performance through carefully selected preamp components, a wide input-gain range, and DSP-controlled limiting. Its input configuration supports a broad range of sources, including lavalier microphones, dynamic microphones, and line-level signals. Input gain can be adjusted across a 44 dB range in precise 1 dB increments, allowing the transmitter to be matched closely to the incoming signal. This helps maximize available dynamic range while maintaining an excellent 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
• Two AA battery power
• Solid machined aluminum housing

Operating Frequencies:
DBu 470.100 - 607.950 MHz
DBu/E01 470.100 - 614.375 MHz
NOTE: It’s the user’s responsibility to select the approved
frequencies for the region where the transmitter is operating
Operating temp. range: Celsius: -20° - 50°; Farenheit: -5° - 122°
Frequency Selection Steps: 25 kHz
Audio Frequency Response: 20 Hz – 20 kHz +- 3dB
RF Power output: Selectable; 10, 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 Ultra recommended
Battery Life: 5 hours; Duracell Ultra 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)
Emission Designator: 200KG1E