CML Microcircuits, innovator and provider of low-power semiconductors for global wireless and wireline communications markets, has announced the launch of a new audio scrambler and sub-audio signalling processor to it’s family of analogue two way radio ICs.
The CMX138A audio scrambler and sub-audio signalling processor is an upgrade based on the successful CMX138 IC. It is intended for use in half duplex analogue two-way radios or family radio equipment, particularly suited to enhanced MURS, GMRS, PMR446 and FRS designs.
Highly integrated by design, this device provides a user programmable frequency inversion audio scrambler with signal processing functions, CTCSS, DCS and in-band tones, allowing comprehensive voice processing and tone control.
Key enhancements for the CMX138A audio scrambler and sub-audio signalling processor include:
- improved limiter functions
- enhanced CTCSS and DCS performance
- a new input Automatic Gain Control (AGC) function
- in-band tone operation enabled down to 288Hz; and
- improved audio compandor which enhances the performance of compressed signals.
Other important features include:
- auxiliary ADC channel
- auxiliary DAC interface with optional RAMDAC to facilitate transmitter power ramping; and
- auxiliary system clock output and transmit output for single-point-modulation.
The CMX138A is available in a small, low-power (3.0V to 3.6V with flexible powersave modes), 28-pin (E1) TSSOP package.
The CMX138A audio scrambler and sub-audio signalling processor is available in Australia from Caelera .