The DCHT portable digital stereo transmitter is designed for use in film and TV production as both a wireless audio link from a bag or cart system to cameras and as a portable IFB transmitter paired with the Duet digital wireless M2R receiver packs. The DCHT accepts two channels of mic or line level analog signals or an AES digital signal from a mixer and transmits to the receiver or receivers in a purely digital format. The digital architecture of the new DCHT is a third-generation design with specially developed, high-efficiency circuitry for extended operating time on two AA batteries.

The DCHT can tune across the available UHF TV band from 470.00 to 607.950 MHz (470-614 MHz for export versions) in 100 kHz or 25 kHz steps, offering more than 6000 frequencies. The RF output can be set to 10, 25 or 50 mW, thus providing flexibility in terms of operating range for the intended application. The digital architecture allows for AES256-CTR encryption for applications where content security is a concern.

Accessories

The DCHT, DCHT/E01 transmitter is designed for use in film and television production to provide a wireless link from a bag or cart system to cameras and recorders. The transmitter will accept mic or line level analog signals or AES digital signals from a mixer and transmit the signals to the receiver in a pure digital format. The digital architecture is a fourth generation design with specially developed, high efficiency digital circuitry for extended operating time on two AA batteries. input level LEDs (one per audio channel), the programmable function switch and the audio input jack. The red/ green LEDs provide audio level indications from -20 dB to the onset of limiting for each channel for accurate input gain adjustment. The programmable switch can be configured as a mute switch, a power on/off switch, or be bypassed. The 6-pin input jack accepts two mic or line level analog signals or AES digital signals from external sources via a variety of adapter cables. Analog inputs can be linked for the same gain when used with a stereo source, or operate independently with individual settings. The transmitter can tune in coarse or fine steps across the UHF television band from 470.100 to 691.175 MHz, with a selectable output power of 10, 25 or 50 mW. The pure digital architecture enables AES 256-CTR encryption for high level security applications. Studio quality, stereo 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 51 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. The top panel contains the antenna jack, two audio The housing is constructed of solid machined aluminum for lasting ruggedness. The exterior is finished with an ultra hard, dark electroless nickel finish. WARNING: Moisture, including talent’s sweat, will damage the transmitter. Wrap the DCHT in a plastic baggie, our silicone cover (order part # DCHTCVR) or other protection to avoid damage.

Features

• Tunes across entire UHF frequency range
• 256-bit encryption – AES 256-CTR
• Selectable RF power at 10, 25 and 50 mW
• AES and analog mic and line level inputs
• USB port for firmware updates
• Wide range input gain adjustment
• Compatible with Duet M2R receiver
• DSP-controlled input limiter
• Two AA battery power
• Solid machined aluminum housing
• Optional powering from external DC
• 2-way IR (infrared) port for fast setup

Specifications

• Celsius: -20° - +40°; Farenheit: -5° - +104°
• Frequency Selection Steps: 25 kHz
• RF Power Output: Selectable; 10, 25 or 50 mW. 20mw max for
• E09 version: 10/25mW 470.100-614.375
• Frequency Stability: ± 0.002%
• Digital Modulation: 8PSK
• Encryption: AES 256-CTR (per FIPS 197 and FIPS 140-2)
• Equivalent Input Noise: –128 dBV
• Input Types: • Analog; mic and line level
• Input Impedance: • Mic: 300 or 4.5 k ohm; selectable
• Input Limiter: Dual envelope type; 30 dB range
• Gain Control Range: 51 dB in 1 dB steps; digital control
• Modulation Indicators: • Bicolor LED indicates modulation of
• Frequency Response: 15 Hz – 11.3 kHz, +0, -3 dB
• Controls: • Top panel toggle switch; programmable as
• Audio Input Jack: Switchcraft 6-pin locking (TA6F)
• Antenna: Galvanized steel, flexible wire, SMA connector
• Battery: Two AA Lithium recommended
• Battery Life: 5 hours
• Weight: • 5.75 ozs. (163 grams); w/ belt clip and lithium
• Overall dimensions: 3.45 x 2.44 x .742 in. (88 x 62 x 19 mm)
• Emission Designator: 200KG7E