Garmin MX20 - Manual (Page 51)

Detailed Operation
Self-Test
When in Standby Mode, a TAS Self-Test can be initiated by selecting this option.
TCAD 9900B 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 cur-
rent 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.
Mute Duration
The Mute Duration allows the duration of the mute command to be sent to the TCAD unit. See the TCAD
operator’s manual for additional details.
Shield
This allows the current shield to be selected from a pop-up window. En Route, Unrestricted, Terminal,
Ground, and Standard are the available modes. See the TCAD operator’s manual for additional details.
TAS/TCAD Traffic