Garmin GPS 400 Pilot's Manual & Reference page 193

Altitude Display Mode
The GTS 8XX has four altitude display modes
(Figure 10-24); Normal (±2,700 ft), Above (-2,700 ft to
+9,000 ft), Below (-9,000 ft to +2,700 ft), and Unrestricted
(±9,900 ft). The GTS 8XX continues to display up to 30
intruder aircraft within its maximum surveillance range,
regardless of the altitude display mode selected.
The selected altitude display mode (Figure 10-25)
is displayed in the upper left-hand corner of the Traffic
Page.
Changing the Altitude Display Mode:
From the Traffic Page, press the small right
1)
knob to activate the cursor and highlight the
current mode (Figure 10-25).
Turn the small right knob to cycle through
2)
the options. The screen changes to display
the traffic detected within the selected
altitude display range. Refer to Figure 10-24
for information regarding altitude display
ranges.
+9,900 ft
+2,700 ft
-9,000 ft
-9,900 ft
190-00140-60 Rev. H
0 ft
Drawing Not to Scale
Figure 10-24 Altitude Display Modes
GPS 400 Pilot's Guide and Reference
ADDITIONAL FEATURES
NOTE: Confirmation is not required, the mode is
changed immediately when using the small right
knob.
Altitude Display Mode
Figure 10-25 "UNR" Selected
3) Press the small right knob to turn the cursor
off after the selection is made.
+9,000 ft
+2,700 ft
0 ft
-2,700 ft
SECTION 10
10-15