40Detailed OperationShield HeightsThis allows the shield heights to be adjusted for the En Route, Standard, and Terminal shield modes. See theTCAD operator’s manual for additional details.Shield RangesThis allows the shield ranges to be adjusted for the En Route, Standard, and Terminal shield modes. See TCADoperator’s manual for additional details.TCAD 9900BX Menu OptionsAltitude 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 “-”, whileabsolute altitudes are shown as just a number.FilterAn 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 thefiltering is active.VolumeThe volume of the TCAD voice alert can be adjusted by pressing the Volume button. This opens a text menuwhere a value from 0 – 10 can be entered.Approach ModeThe Approach Mode sends the approximate elevation of the destination airport to the TCAD unit for approachmode operations. See the TCAD operator’s manual for additional details.Ground/Flight ModeThe GND/FLT mode commands the TCAD unit into the corresponding mode. See the TCAD operator’s manualfor additional details.TAS/TCAD Traffic
