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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 UHG TV band from 470.00 to 607.950 MHz 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.
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
Product Specification
Operating Frequencies: 470.100 - 607.950 MHz
Frequency Selection Steps: 25 kHz
RF Power Output: Selectable; 10, 25 or 50 mW
Frequency Stability: ± 0.002%
Spurious Radiation: Compliant ETSI EN 300 422-1 v1.4.2
Digital Modulation: 8PSK
Equivalent Input Noise: –128 dBV
Input Types: AES and analog
Analog Input Level: Mic: nominal 2 mV to 300 mV, before limiting; greater than 1V maximum, with limiting
Line: +24 dBu before limiting Input Impedance: • Mic: 300 or 4.5 k ohm; selectable
Line: greater than 100 k ohm
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 -20 and 0 dB referenced to full modulation
LCD bar graph
Compatibility Modes: DCH (Digital Camera Hop)
Duet (IEM)
Frequency Response: 20 Hz -10.5 kHz ± 1 dB
Controls: Top panel toggle switch; programmable as power, mute or none (off) function
Side panel membrane switches with LCD interface for power on/off & all setup & configuration controls