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Subject: TETRA An Overview
TETRA has been developed under the auspices of ETSI as a single pan-European standard to bring the benefits
of digital transmission: security, clarity of speech, seamless data transmission and efficient spectrum usage,
to mobile radio.
TErrestrial Trunked RAdio, TETRA presents some interesting challenges for the terminal design engineer.
[application note link].
Subject: Using the CMX980A for Non-TETRA Radio Schemes
The CMX980A is a truly universal in-phase and quadrature (I/Q) compatible digital radio baseband processor that
can used with many types of analogue and digital modulation including AM, FM, SSB, QAM, BPSK,
QPSK, FSK, etc.
It is a highly integrated system which saves space and cost for the manufacturers producing both analogue and
digital radio products. The device allows baseband signals to directly modulate the I/Q carriers for Pi/4DQPSK,
or allows direct write access to the I/Q Tx 79-tap filter inputs for use in systems where different modulation
schemes are used.
The CMX980A already meets the demanding specifications required by TETRA and thus the programmable filters
available on-chip are capable of meeting the requirements of any analogue or digital communication system.
The discussion in this application note describes some of the theory behind I and Q modulators, and details how the
CMX980A could be used with any modulation scheme:
[application note link].
Subject: FX980 in TETRA Digital Mobile Radio
A Power Point Presentation.
[application note link].