Technical data
Product Specification
HIF-2121/R5 CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 965-1176-601 REV: D SHEET 18
0 1 2 3 4
MODE 5 BELOW GLIDESLOPE ALERT
GLIDESLOPE DEVIATION (DOTS FLY UP)
M
IN
T
E
R
R
A
IN
C
L
E
A
R
A
N
C
E
(F
T
)
1000
900
800
700
600
500
400
300
200
100
0
GEAR DOWN
MODE 5 EXCESSIVE GLIDESLOPE
DEVIATION
HARD
SOFT
"GLIDESLOPE"
HARD
"GLIDESLOPE"
RUNWAY
GLIDESLOPE
BEAM
CENTER
SOFT ALERT AREA HARD ALERT AREA
ALERT AREA
SOFT
ALERT
AREA
FIGURE 1.3.1.5-1: MODE 5 - EXCESSIVE GLIDESLOPE DEVIATION
Other variations to the Mode 5 alert boundaries are as follows:
• Envelope Modulation, as described in section 1.3.1.7
• Localizer intercept, as described in section 6.2.5 (note: localizer is not a basic input, and is only available when
digitally sourced).
• Level flight intercept
1.3.1.6 Mode6–AltitudeCall-Outs
Mode 6 provides audio callouts for descent below predefined altitudes and minimums as shown in Figure 1.3.1.6-1. Excessive
bank angle warnings, including a reduction of threshold if the autopilot is engaged, are also provided as part of this mode as
shown in Figures 1.3.1.6-2 (available on MKVI and MKVIII EGPWS) and 1.3.1.6-3 (available on MKVIII EGPWS only).
The “Bank Angle” aural warning is given twice, and then suppressed unless the roll angle increases by an additional 20%.
Specific callouts are selectable via configuration items in the configuration module from predefined menus. Mode 6 callouts
produce aural output indications, but do not produce visual indications.
A “smart five hundred” foot callout is available. This callout will only be issued when the system detects that a non-precision
approach is being performed or that the aircraft is outside ±2 dots glideslope deviation.
A callout is available indicating 500 feet above runway field. This is based upon geometric altitude.
A “minimums-minimums” callout is provided based upon the decision height discrete.
An optional discrete input provides the ability to force the Mode 6 audio level to lower audio volume. This enables operators
to control the Mode 6 volume level with activation of windscreen rain removal or if lower volume callouts are desired at all
times.