Lectrosonics DBu Digital Encrypted Beltpack Transmitter
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Lectrosonics DBu Digital Encrypted Beltpack Transmitter
The DBu transmitter is a 4th generation design with specially developed, high-efficiency digital circuitry for extended operating time on two AA batteries. The transmitter can tune in coarse or fine steps across the UHF television band from 470 to 608 MHz (470-614 MHz for export versions), with a selectable output power of 25 or 50 mW. The pure digital architecture enables AES 256-CTR encryption for high-level security applications.
The top panel contains the antenna jack, audio input level LEDs, the programmable function switch and the audio input jack. The LEDs provide red/green indications of the audio level from -20 dB to the onset of limiting to enable accurate input gain adjustment. The programmable switch can be configured as a mute switch, a power on/off switch, talkback, or be bypassed.
Studio quality audio performance is assured by high quality components in the preamp, wide range input gain adjustment and DSP-controlled limiting. Input connections and settings are included for any lavaliere microphone, dynamic microphones and line level inputs. Input gain is adjustable over a 44 dB range in 1 dB steps to allow an exact match to the input signal level, maximizing the dynamic range and signal to noise ratio.
Key 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
Technical Specifications
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
Included Accessories
1 - AMM-19 straight antenna - SMA mount
1 - AMM-22 straight antenna - SMA mount
2 - AA Batteries
1 - 26895 wire belt clip
