CMX991 RF Quadrature (I/Q) Transceiver

CMX994 RF Direct Conversion Receiver

CMX608, CMX618, CMX638 RALCWI Vocoders

CMX7131/CMX7141 Digital PMR Processors

CMX992 RF Quadrature/IF Receiver

CMX993/CMX993W RF I/Q Modulator

CMX981 Advanced Digital Radio Baseband Processor

CMX998 Cartesian Feedback Loop Transmitter

CMX980A Digital-Radio Baseband Processor

CMX990 GMSK Packet-Modem and Tx/Rx


CML's Digital Two-way Radio Products
Solutions for both FDMA and TDMA based PMR/LMR systems
Digital Two-way Radio Products
CML offers a wide range of voice, signalling and data processing ICs for digital communications systems, integrating baseband processing. Features include: vocoder support, air interface coding and data modems, plus auxiliary functions supporting the overall radio design.

Solutions are available for both FDMA and TDMA based PMR/LMR systems, including:
  • FDMA - dPMR, DCR, NXDM and similar systems
  • TDMA - TETRA, DMR, P25 and related systems

RF products are also available to support these systems.

An RF transceiver demonstrator board, (ATB010 dPMR RF Demonstrator Kit) targeted at 6.25kHz FDMA systems is also available.

< < < < < < < < Please use the links on the left to view the relevant product overviews.

Product Comparisons
Product Data Scheme Auxiliary Supply
CMX7131/CMX7141
Digital PMR/LMR Processor
for systems including dPMR, DCR and NXDN 		4-Level FSK
4.8k and 9.6k b/s Options		 ADCs and DACs 3.0 to 3.6 V
CMX981
Advanced Digital-Radio Baseband Processor		 pi/4 DQPSK,
4-Level FSK,
GMSK and
C4FM		 ADCs and DACs 2.5V
(3.3V tolerant I/O)
CMX980A
Digital-Radio Baseband Processor		 pi/4 DQPSK ADCs and DACs 3.0 to 5.0 V
RALCWI Vocoder ICs
CMX608
Half Duplex RALCWI Vocoder		 RALCWI
2050, 2400, 2750 b/s
3600b/s with FEC		 Voice Activity Detector
Comfort Noise Generator
DTMF and Tone Generator		 1.8V
(3.3V tolerant I/O)
CMX618
Half Duplex RALCWI Vocoder
with Audio Codec		 RALCWI
2050, 2400, 2750 b/s
3600b/s with FEC		 Voice Activity Detector
Audio Codec
Comfort Noise Generator
DTMF and Tone Generator
CMX638
Full Duplex RALCWI Vocoder
with Audio Codec		 RALCWI
2050, 2400, 2750 b/s
3600b/s with FEC		 Voice Activity Detector
Audio Codec
Comfort Noise Generator
DTMF and Tone Generator
Compatible RF ICs
Product Frequency Range Auxiliary Supply
CMX990
GMSK Modem and RF Transceiver 		400MHz to 1GHz ADCs and DACs,
System Clocks
Dual Integer-N Synthesisers 		3.0 to 3.6 V
CMX991
RF Quadrature Transceiver 		100MHz to 1GHz   3.3V
CMX992
RF Quadrature/IF Receiver 		 
CMX993
RF (I/Q) Quadrature Modulator 		30MHz to 1GHz  
CMX998
Cartesian Feedback Loop Transmitter 		100MHz to 1GHz   3.0 to 3.6 V

Example
The DE6181 is designed to assist in the evaluation of the CMX7141** IC, when loaded with a relevant Function Image™ (FI) and the CMX618 ICs.
The kit is in the form of a populated PCB comprising CMX7141 and CMX618 ICs and appropriate supporting components and circuitry. Function Images™ (FI) for dPMR radio designs and other applications are available from the CML website.

The board is fitted with connectors allowing the DE6181 to be operated with a CML PE0002 Interface Card and associated PC GUI software, or by direct connection between the CMX7141 C-BUS serial port and the user's µC development application or emulation system.

The CMX7141 Function Image™ (FI) can be loaded, on power-up, directly into the on-board target CMX7140 IC using the PE0001 interface or the user's system. Alternatively, it can be pre-loaded, separately, into the on-board Flash EEPROM for automatic operation on power-up.
The CMX7141 device is specially configured for use on the DE6181 kit and is not available as a production part. It is capable of demonstrating the operation of any CMX714x product.

The DE6181 board also incorporates all the necessary power-supply regulation facilities for operation from a single 5-volt supply, together with a number of board jumpers to enable various circuit arrangements to be effected.

Note: ** The CMX7140 is a functional (CMX7141) emulation IC for use with this DE6181 DemoKit and is not available as a production IC.

Glossary
C-BUS CML's serial bus and control system used to communicate digital information between a µP or µC and peripheral ICs.
DCR Digital Convenience Radio.
DMR Digital Mobile Radio.
dPMR Digital Private Mobile Radio.
EEPROM Electrically-Erasable Programmable Read Only Memory.
FDMA Frequency Division Multiple Access.
LMR Land Mobile Radio.
NXDN A Common Air Interface (CAI) technical protocol for mobile communications systems.
P25/APCO-2 A suite of standards for digital radio communications for use by federal, state/province and local public safety agencies in North America.
PMR Private Mobile Radio.
TDMA Time Division Multiple Access.
TETRA TErrestrial Trunked RAdio.