KAD/VDC/001 Differential-ended voice-to-digital converter (CVSD)
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Features
- Two differential-ended audio input channels
- Programmable sampling rates (8 kbps to 64 kbps)
- Fully IRIG-106 Chapter 5 compatible
- 500 Hz tone output for link indication or calibration/verification
- Programmable word length, for example 16 bits @ 32 kbps = 2 k words per second
Applications
- Cockpit voice monitoring
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2 channel, Differential ended voice-to-digital converter (CVSD) - 2ch at 64kbps
The KAD/VDC/001 is a dual audio-to-digital converter module.
At the core of the module is a delta-modulator where the delta size depends on the rate of change. This is referred to as Continuously Variable Slope Delta (CVSD) modulation. This delta-modulator outputs a serial stream to a serial-to-parallel converter, the output of which is regularly read over the backplane. For a detailed description of this type of audio encoding, refer to the IRIG-106 standard, Chapter 5.
A tone output is also available that can be connected to a channel, for link indication or calibration/verification.
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