Chapter 1 Introduction
ASTRO
Digital Spectra
and Digital Spectra Plus control heads are available in five radio models:
W3, W4, W5, W7, and W9. This chapter describes the control heads used with these radios.
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 care must be taken
and observed.
NOTE: An operational procedure, practice, or condition that is essential to emphasize.
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.
!
C a u t i o n
!
W A R N I N G
!
D A N G E R
!
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