PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
Electronic Display System (EDS)
3-8
D
SG (Symbol Generator) Button
-- This button selects between
NORM or cross--side SG to supply the on--side displays.
NOTE:
When the cross side SG is selected, the PFD and MFD on
both sides of the cockpit are identical since they are both
driven by the cross--side SG.
D
AHRS Button
-- This button selects between NORM or cross--side
AHRS to supply the on--side PFD attitude and heading.
NOTES:
1. When an AHRS fails and, if reversionary AHRS is
selected, the AP is not available.
2. It is possible for both pilots to select AHRS
reversionary. In that case, each pilot receives
AHRS information from the cross--side AHRS.
3. Selecting reversionary AHRS, disengages all flight
director modes and the AP. If both AHRSs are
working normally, the modes (and AP) can be
re--engaged.
Data Acquisition Unit (DAU) Reversionary Panel
The DAU reversionary panel, shown in figure 3--4, selects between
NORM, and reversionary for each DAU to supply data to the SGs. In
NORM, each DAU uses its A channel data for display. In reversion,
each DAU uses its respective B channel for display.
AD--50893@
DAU Reversionary Panel
Figure 3--4
EDS Dimming Panel
The EDS dimming controls are located on the glareshield dimming
panel. They are used to set the dimming reference for DU light sensor
operation.
