Introduction
What TETRA stands for
TETRA is a wireless communication standard for Professional Mobile Radio
(PMR) and Private Access Mobile Radio (PAMR) applications. It is a digital
format, ie speech is transmitted as binary data rather than by an analog format
as for instance using frequency modulation. This way, it is much more difficult to
tap a radio communication.
The acronym TETRA stands for:
TErrestrial Trunked RAdio
If you are familiar with measurements in the analog world, eg MPT 1327 or LTR,
you will notice some similarities as well as some new measurements. While RF
power and frequency error are measurements important to any system, measur-
ing a vector error or looking at the constellation display may be a new experience
because these measurements are specific to the modulation format applied by
TETRA, which is π/4 DQPSK.
This manual describes the measurements and tests on TETRA mobile stations
supported by the TETRA MS Test option to the STABILOCK 4032. Although this
option can also be used to test the transmitter of TETRA base stations, there is
another option available, TETRA BS Test (software option 897 942), which is far
better suited to test TETRA base stations.
10
Introduction TETRA MS Test
10-5
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