Chapter 1 Introduction
1.1 Notations Used in This Manual
Throughout the text in this publication, you will notice the use of note, caution, warning, and danger
notations. These notations are used to emphasize that safety hazards exist, and due care must be
taken and observed.
NOTE: An operational procedure, practice, or condition that is essential to emphasize.
1.2 Radio Descriptions
The ASTRO Digital Spectra and Digital Spectra Plus radios are among the most sophisticated two-
way radios available. The ASTRO Digital Spectra is available with VHF, UHF, and 800 MHz bands,
and the Digital Spectra Plus is available with VHF and 800 MHz bands only.
The ASTRO Digital Spectra and Digital Spectra Plus radios provide improved voice quality across
more coverage area. The digital process called “embedded signaling” intermixes system signaling
information with digital voice, resulting in improved system reliability and the capability of supporting
a multitude of advanced features. Such features add up to better, more cost-effective two-way radio
communications.
CAUTION indicates a potentially hazardous situation which, if
not avoided, might
result in equipment damage.
WARNING indicates a potentially hazardous situation
which, if not avoided, could
result in death or injury.
DANGER indicates an imminently hazardous
situation which, if not avoided, will
result in death or
injury.
!
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