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PRIMUS
r
880
Digital
W
eather
Radar
System
A28-1146-102-00
System Configurations
2-1
2. System Configurations
The PRIMUS
â
880 Digital Weather Radar System can be operated in
many configurations to display weather or ground mapping information
on a radar indicator, electronic flight instrument system (EFIS) display,
multifunction display (MFD), or on a combination of these displays. The
various system configurations are summarized in the following
paragraphs and shown in figure 2-1.
NOTE: Other configurations are possible but not illustrated.
The stand-alone configuration consists of two units: receiver
transmitter antenna (RTA), and a dedicated radar indicator. In this
configuration, the radar indicator contains all the controls to operate the
PRIMUS
â
880 Digital Weather Radar System. A single or dual
Honeywell EFIScan be added tothe stand-aloneconfiguration. Insuch
a case the electronic horizontal situation indicator (EHSI) repeats the
data displayed on the radar indicator. System control remains with
the radar indicator.
The second system configuration uses an RTA, and single or dual
controllers. The single or dual EFIS is the radar display. Since there is
no radar indicator in this configuration, the radar system operating
controls are located on the controller. With a single controller, all cockpit
radar displays are identical.
The dual configuration gives the appearance of having two radar
systems on the aircraft. In the dual configuration, the pilot and copilot
each select independent radar mode, range, tilt, and gain settings for
display on their respective display. The dual configuration time shares
the RTA. On the right-to-leftantenna scan, the system switches to the
mode, range, tilt, and gain selected by the left controller and updates
the left display. On the reverse antenna scan, the system switches to
the mode, range, tilt, and gain setting selected by the right controller
and updates the right display. Either controller can be slaved to the
other controller to show identical images on both sides of the cockpit.
NOTE: When WAIT, SECTOR SCAN, or FORCED STANDBY are
activated, the radar operates as if in single controller
configuration. This is an exception to the ability of each pilot
to independently select modes.