Garmin MX20 - Manual (Page 52)

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Detailed Operation
Shield Heights
This allows the shield heights to be adjusted for the En Route, Standard, and Terminal shield modes. See the
TCAD operator’s manual for additional details.
Shield Ranges
This allows the shield ranges to be adjusted for the En Route, Standard, and Terminal shield modes. See TCAD
operator’s manual for additional details.
TCAD 9900BX Menu Options
Altitude Option (Relative/Pressure)
The Altitude option lets you select between relative and pressure altitude in hundreds of feet. The Altitude op-
tion choice is shown in the upper left corner of the screen. Relative altitudes are shown with a “+” or “-”, while
absolute altitudes are shown as just a number.
Filter
An altitude filter allows targets that are outside of a ±2000’ vertical range to be filtered off the display.
The current mode is shown in the upper left corner of the display as “ALL” (no filtering) or “±2000” when the
filtering is active.
Volume
The volume of the TCAD voice alert can be adjusted by pressing the Volume button. This opens a text menu
where a value from 0 – 10 can be entered.
Approach Mode
The Approach Mode sends the approximate elevation of the destination airport to the TCAD unit for approach
mode operations. See the TCAD operator’s manual for additional details.
Ground/Flight Mode
The GND/FLT mode commands the TCAD unit into the corresponding mode. See the TCAD operator’s manual
for additional details.
TAS/TCAD Traffic