DE9944 Datasheet, PDF (1/3 Pages) CML Microcircuits – SDR Demonstrator

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DE9944
SDR Demonstrator
Software Defined Radio Demonstrator for FDMA Digital/Analogue PMR
PP/9944/1 December 2013
Introduction
FDMA (6.25 kHz) digital PMR is
an enabler to achieve highly
functional solutions by using low
cost and low complexity
technology.
There are a number of FDMA
digital PMR technologies
available including: dPMR,
NXDN, ARIB STD-T98,
ARIB STD T-102, all providing the
best possible channel efficiency.
dPMR is an ETSI standard that
offers voice and/or data for peer
-to-peer through to complex
trunking applications. The dPMR
ETSI standards TS 102 490 and
TS 102 658 comply with the
Harmonised EN 301 166-2
Standard.
The DE9944 FDMA digital radio
SDR demonstrator provides the
fastest route from evaluation
through to production of a small,
highly integrated FDMA digital
PMR Radio.
Design Support
Available via the CML website:
 DE9944 SDR Demonstrator
 User manual
 Board schematics
 Board Gerber files
 BOM list
 Scripts
 Host ‘C’ code
 Individual Product Data
 CMX7141 Analogue/
digital PMR Processor
 CMX994 Direct
Conversion Receiver
 CMX7262 Professional
Radio Vocoder
 CMX618 RALCWI Vocoder
DE9944 Brief Description
The DE9944 is a compact demonstration platform for Narrowband FDMA
Digital/Analogue PMR Radio, providing a complete RF to baseband solution.
The board is based on the CMX7141 FDMA PMR Processor and incorporates the CMX618
RALCWI Vocoder, the CMX7262 TWELP Professional Radio Vocoder, and the CMX994 Direct
Conversion Receiver. The board can be used to demonstrate a complete RF transceiver and
baseband function supporting a direct conversion receiver and VCO 2-point modulation
transmitter.
The DE9944 features a built in keyboard, display, microphone and speaker and so can be
used to demonstrate peer-to-peer operation in a stand-alone configuration. The board has an
ARM processor which handles initial board power up and loading of the Function Images for
the CMX7141 and CMX7262. Once the system is powered up, the processor implements basic
radio functionality (channel selection etc) and baseband control, allowing demonstration of a
simple voice call and data transfer.
The DE9944 provides a Fractional-N PLL and VCO plus associated circuits to provide local
oscillator signals for the CMX994. The design also includes a 1W power amplifier, harmonic
filter and Tx/Rx switch. The RF performance is designed to be compliant with EN 301 166 for
dPMR applications and TIA-603-D / EN 300 086 for analogue applications. All the circuits are
provided with power-down capability to allow powersave / standby operation.
Feature Summary
 Direct Conversion Digital Radio Demonstrator
 Digital PMR (e.g. dPMR) and Analogue FM
 Provides demonstration platform for:
 Direct Conversion Receiver CMX994
 FDMA Radio Processor CMX7141
 TWELP Professional Radio Vocoder CMX7262
 RALCWI Vocoder with Integrated Voice Codec
CMX618
 Can function in the following modes
 Completely stand-alone
 Controlled by scripts running via PC
 User-defined host controller interface
 On-board
 ARM Host Processor (Cortex M3)
 Frac-N PLL and VCO for 444 MHz
to 450 MHz Operation
 1W Power Amplifier
 Microphone
 Loudspeaker
 Jack sockets for audio in/out
 16-button (4 x 4) Keypad
 2 x 16-character LCD Display
 Powered by external 4.5V power
supply or 3 x AA batteries
© 2013 CML Microsystems Plc
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