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 to 691 MHz in 100 kHz or 25 kHz steps. 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.
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 DCHR and Duet M2R receiver
- DSP-controlled input limiter
- two AA battery power
- solid machined aluminum housing
- optional powering from external DC with LTBATELIM
| Category | Specification | Detail |
| RF & Wireless | Operating Frequencies |
 A1B1 model: 470.100-614.375 MHz | B1C1 model: 537.600-  691.175 MHz
|
| RF & Wireless | Frequency Selection Steps | Â 25 kHz |
| RF & Wireless | RF Power Output | Â Selectable: 10, 25 or 50 mW |
| RF & Wireless | Frequency Stability | Â +/-0.002% |
| RF & Wireless | Spurious Radiation | Â Compliant ETSI EN 300 422-1 v1.4.2 |
| RF & Wireless | Digital Modulation | Â 8PSK |
| RF & Wireless | Emission Designator | Â 200KG1E |
| RF & Wireless | Compatibility Modes |
 DCH (Digital Camera Hop) and Duet (IEM)
|
| RF & Wireless | Antenna |
 Galvanized steel, flexible wire, SMA connector
|
| Audio Performance | Frequency Response | Â 15 Hz-11.3 kHz, +0, -3 dB |
| Audio Performance | Equivalent Input Noise | Â -128 dBV |
| Audio Input | Input Level |
 Mic: nominal 2 mV to 300 mV (before limiting), greater than 1V max  (with limiting) | Line: +24 dBu (before limiting)
|
| Audio Input | Input Impedance |
 Mic: 300 or 4.5 k ohm (selectable) | Line: greater than 100 k ohm
|
| Audio Input | Input Limiter | Â Dual envelope type, 30 dB range |
| Audio Input | Gain Control Range | Â 51 dB in 1 dB steps, digital control |
| Audio Input | Audio Input Jack | Â Switchcraft 6-pin locking (TA6F) |
| Interfaces & Controls | Modulation Indicators |
 Bicolor LED indicates modulation of -20 and 0 dB referenced to full  modulation and LCD bar graph
|
| Interfaces & Controls | Controls |
 Top panel toggle switch (programmable as power, mute or off) |   Side panel membrane switches with LCD interface
|
| Power | Battery |
 Two AA (Duracell Quantum recommended)
|
| Power | Battery Life | Â 5 hours (Duracell Quantum alkaline) |
| Physical | Weight |
 163g (with belt clip, lithium AA) | 181g (with belt clip, Duracell  Quantum AA)
|
| Physical | Overall Dimensions (H x W x D) | Â 88 x 62 x 19 mm |



