Honeywell PRIMUS 1000 - BRG (Bearing) Knobs; Navigation Bearing Pointers; RA (Radio Altitude) Knob;Test Button

PRIMUSr 1000 Integrated Avionics System
A28--1146--112--00
4-21
Electronic Flight Instrument System (EFIS)
D BRG (Bearing) Knobs -- The HSI can display two independent
bearing pointers. The selectable bearing sources for each pointer
are described in table 4--2.
BRG f BRG Z
OFF OFF
NAV 1 NAV 2
ADF ADF
FMS FMS
NOTE: FMS is optional.
Navigation Bearing Pointers
Table 4--2
D RA (Radio Altitude) Knob/TEST Button -- These two concentric
controls are used to set RA minimum altitude setting (outer knob),
and to run the TEST function (inner button).
When the TESTbutton is pushed, the on--side PFD and MFDenter
the test mode. In the test mode, flags and cautions are displayed
along with a check of the radio altimeter. The EICAS also displays
a test pattern when the integrated avionics computer (IAC) that is
driving the EICAS page is in test. Normally, this is the left IAC.
NOTE: Once airborne, only the radio altimeter is tested but not if
the flight director has captured an ILS glideslope.
Adetaileddescriptionof thedisplaytestresultsiscontainedinEFIS
Preflight Checklist, later in this section.