Control Unit (Spectra 9000); Figure 3 Typical Systems 9000 Control Unit - Motorola Spectra Service Manual

VI. CONTROL UNIT (Spectra 9000)
Spectra 9000 TM radios use the Systems 9000
trol Unit. The differences between control units is in
the programming software and button legends.
The Systems 9000 control unit is a microcomputer-
based unit that processes all the button inputs and
displays used by the radio and the options. It also inter-
faces with the vehicle via the vehicle interface ports
(VIP).
A. Description of Controls (see Figure 3).
1. Power Switch
The power switch is a slide switch on the right-hand
bottom surface of the control unit. It turns the radio and
its accessories on and off.
2. Display
The 11-character vacuum-fluorescent display's pri-
mary function is to display mode numbers, mode
names, volume level, and the status of options. It also
functions as an on-off indicator for the entire system,
and plays an integral role in the operator's reconfigura-
tion of options.
3. Option Buttons
Located above the display window is a row of six
buttons for turning options on and off. Below each is a
small indicator light to show the status of the option.
4. XMIT and BUSY Indicators
Above the six option buttons are XMIT and BUSY
indicators. The XMIT indicator lights when the radio is
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Figure 3. Typical Systems 9000 Control Unit
NOTE
TM Con-
transmitting. The BUSY indicator lights when the select-
ed channel is busy.
5. Scan Indicators
In the right-hand side of the display window
are the NON-PRI and PRI indicator lights. When scan
operation detects activity on a non-priority (NON-PRI)
channel, the NON-PRI light comes on. Activity on a
second-priority channel causes PRI to light. First-priori-
ty channel activity causes PRI to flash.
6. Mode Rocker Switch
Below the display window is the Mode rocker.
Pressing the right side of this rocker switch increases
the mode number. Press the left side to decrease the
mode number. If you press and hold the switch, it scrolls
the mode numbers up or down. The mode names
appear in the display window.
7. Vol Rocker Switch
Below the display window, beside the Mode switch,
is the Vol rocker. Press and release to check volume
setting. The display shows "VOLUME _ _" and a num-
ber value (0-15). Press and hold the right side of the
rocker to increase the volume setting. Press and hold
the left side to decrease volume. The number value
scrolls up or down to the desired level.
The Vol rocker also controls the volume level of the
public address (PA) and external radio speaker (ExRd)
options when they are enabled. The display window
shows "PA VOL_ _" when public address is on and Vol
is pressed.