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The D4 digital 4-channel wireless system was designed as a special purpose system for location production in film and television.
- DTV-free unlicensed ISM band 902-928 MHz
- Digital or analog inputs; digital or analog outputs
- 24-bit, 48 kHz audio
- 2 or 4 channel operation
- Extended operating range
- Channel pairing for stereo monitoring
- Powered by 9 to 16 VDC
A typical application for this system is in television production as part of what is commonly called a “bag system.” A portable mixer and several wireless microphone receivers are carried in an over-shoulder carrying case. The D4T transmitter is connected to the outputs of the mixer to transmit up to four audio channels to one or more D4R receivers mounted on video cameras.
The system is designed for line level analog audio signals and AES/EBU digital audio signals and can be set up as a 2-channel or 4-channel system with options that provide:
- Digital in/Digital out (< 1 mS latency)
- Digital in/Analog out
- Analog in/Digital out
- Analog in/Analog out (2.2 mS latency)
In the 4-channel mode, the D4 system operates on one of four 4 MHz channels in the 902 to 928 MHz band. Each channel carries four separate audio signals, digitally multiplexed within a common carrier.
The audio quality is suitable for any professional application in film, television and live sound. 48 kHz/24-bit audio, ruler-flat 20-20000 Hz frequency response, ultralow distortion and high dynamic range assure excellent audio reproduction.
Operating range is very similar to top of the line Digital Hybrid Wireless® microphone systems.
The LCD interface makes setup simple and straightforward. Any external power source in the 9 to 16 Volt range may be used.
Housings and panels are machined aluminum with electrostatic powder coated and anodized finishes and laser etched marking for durability.
|Frequencies||902 - 928 MHz
|Audio Inputs||4 x Line-Level Balanced TA3M Mini-XLR Inputs
Simulated Transformer Balanced Inputs
Clip Level Adjustable +0 to +20 dBu (or AES/EBU digital standard)
|Digital Connections||2 x AES/EBU on Balanced TA3M Mini-XLR Inputs
1 x 4-Pin USB Port (for firmware updates)
|Sampling Rate||48 kHz, 24-bit|
|Latency||Digital In/Digital Out:
Less than 1 mS
Analog In/Analog Out:
|Selectable Channels||4 Digital
2 Digital, 2 Analog
|Power Output||200 mW|
|Dynamic Range||> 104 dB A-weighted|
|THD & Noise||< 0.05% (1 kHz @ -10 dBFS)|
|Frequency Response||20 Hz - 20 kHz, +/- 0.5 dB|
|Power Requirements||9 - 16 VDC|
|Power Consumption||500 mA|
|Dimensions||4 x 4 x 1.5" (101.6 x 101.6 x 38.1 mm)|
|Weight||12 oz (339 g)|