PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
Electronic Flight Instrument System (EFIS)
4-20
Display Controller (DC)
The DC is used to select various features on the PFD. These include
horizontal situation indicator (HSI) formats, navigation sources,
weather display, and bearing pointer selection. The location of buttons
and knobs is shown in figure 4--17.
OFF
NAV 1
ADF
FMS
OFF
NAV 2
ADF
FMS
RA
TEST
AD--50910@
Display Controller
Figure 4--17
D
FULL/WX Button
-- This button toggles between the HSI full 360
_
compass, and a partial compass with weather.
NOTE:
When the HSI weather display is selected, the display
range is controlled by the weather radar controller.
D
GSPD/TTG (Groundspeed/Time--To--Go) Button
-- Normally, the
HSI displays GSPD that is computed from the selected navigation
source. The GSPD/TTG button toggles between groundspeed and
TTG to the next waypoint or selected navaid.
D
ET (Elapsed Time) Button
-- When the ET button is pushed,
groundspeed or time to go is replaced with ET. Pushing this button
starts, stops, and resets the digital display of ET.
D
NAV (Navigation) Button
-- When the NAV button is pushed,
VOR/LOC (localizer) information is selected for display on the HSI.
NOTE:
To ensure that the proper source is being used with the
selected flight director modes, when NAV sources are
changed (master/coupled side), the EFIS resets the
lateral FD modes (except for heading).
D
FMS (Flight Management System) Button (Optional)
-- When
the FMS button is pushed, FMS information is displayed on the HSI.