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.

Accessories

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
• Selectable RF power at 10, 25 and 50 mW
• IR (infrared) port for quick setup

Specifications

• 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
• Input impedance: • Mic: 300 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
• Controls: • Top panel toggle switch; programmable as
• 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
• Dimensions: 3.2 x 2.5 x .74 in. (86 x 62 x 19 mm)
• Emission Designator: 200KG1E