CML Microcircuits' (www.cmlmicro.com) digital voice processors offers a simple integration directly into the radio audio path via the audio input/output connections. Its improved performance offers better quality than traditional analogue scrambling.
Featuring ultimate in high-level analogue radio security, progammable instant voice capture, flexible 256 address programming and integrated RALCWI vocoder, it has RALCWI licence included (royalty free). Continaing an embedded data modem with robust and proven modulation scheme, it is offered in small 48-pin LQFP/VQFN package options.
The CMX7011 is a flexible, half duplex, digital voice processor specifically designed for digital voice scrambling applications that transmits and receives secure voice via an embedded robust data modem for use within an analogue PMR. The device allows simple implementation and configuration within existing designs and is intended to be added to a radio via an accessory module or "feature socket".
The device is simple to control via a small, low-power microcontroller. The CMX7011 offers better quality speech than that of traditional analogue radios and, using the internal digital scrambling algorithm, significantly higher levels of security are achieved. The voice scrambling function is provided by an internal digital voice scrambler algorithm. Alternatively, external scrambling is possible via the host microcontroller.
Built in to the CMX7011 is CML's proven and reliable RALCWI (Robust Advanced Low Complexity Waveform Interpolation) vocoder providing near toll quality speech at low bit rates. One of the most significant features in the CMX7011's design is the programmable push-to-talk (PTT) buffer which offers instant voice capture in transmit mode.
The PTT buffer temporarily stores the initial part of the speech and can therefore eliminate clipping that can be caused by the time taken to decode sub audio signals like CTCSS and system delays caused by repeaters. Within the CMX7011's header frame is a user-programmable 8-bit address field which allows up to 256 individual user addresses to be defined.
The device utilises CML's proprietary FirmASIC component technology. On-chip sub-systems are configured by a Function Image™ data file that is uploaded during device initialisation and defines the device's function and feature set.
New features and enhancements to existing functions may be provided from time to time, expanding the capabilities of the device. These will also be provided as Function Images™ which can be downloaded from the CML Technical Portal, a secure area of the CML web site. Details of currently available Function Images™ can be found in the CMX7011 product page on the CML website.
• Implementation of digital voice within analogue PMR
• Secure scrambling add on to existing radios
• Wireless door access systems
• Wireless gate entry systems