February 3, 2003 6881076C20-E
1-2 Introduction: Control Head Descriptions
ASTRO Digital Spectra and Digital Spectra Plus radios are available in five models. Table 1-1 
provides a description of basic features for the five models covered in this manual.
1.2.1 FLASHport®
The ASTRO Digital Spectra and Digital Spectra Plus radios utilize Motorola’s revolutionary 
FLASHport technology. FLASHport makes it possible to add software that drives the radio’s 
capabilities both at the time of purchase and later on. Previously, changing a radio’s features and 
capabilities meant significant modifications, or buying a new radio. But now, the radio’s features and 
capabilities can be upgraded with FLASHport software, similar to the way a computer can be loaded 
with different software.
1.3 Control Head Descriptions
1.3.1 General
The control heads used with ASTRO Digital Spectra and Digital Spectra Plus radios have 
microprocessor circuitry that operates the standard and optional features built into the system. The 
control head design allows installation in even the smallest of vehicles. Systems that have many 
options require more control head buttons, not larger control heads.
The control heads may be field-programmed to add options or alter the information stored in certain 
areas of its electronic memory.
The following illustrations show some typical ASTRO Digital Spectra and Digital Spectra Plus control 
heads.
Table 1-1.  ASTRO Digital Spectra/Spectra Plus Basic Features
Feature W3 W4 W5 W7 W9
Display 2 line/14 
characters 
Liquid-Crystal 
Display (LCD) 
with 8 Status 
Annunciators
1 line/8 
characters
Vacuum 
Fluorescent
Display
1 line/8 
characters
Vacuum 
Fluorescent
Display
1 line/8 
characters
Vacuum 
Fluorescent
Display
1 line/11 
characters
Vacuum 
Fluorescent
Display
Mode & 
Volume
Controls
Rocker Switches Rotary Mode &
Volume Controls
Rocker Switch 
Mode &
Volume Controls
Rocker Switch 
Mode &
Volume Controls
Rocker Switch 
Mode &
Volume Controls
Numeric 
Keypad
YesNoNoYesYes
Channel 
Capability 
(Digital 
Spectra)
255 128 128 255 255
Channel 
Capability 
(Digital 
Spectra Plus)
512 128 128 512 512
Remote Mount Available Available Available Available Available
Dash Mount Available Available Available Available Not Available