Garmin G1000 Cockpit Reference Guide for Cessna Nav IIISECTION 3 – NAV/COM &TRANSPONDER393.3 COLOR CODEFrequencies located in the active field are displayedin either green or white.• An active frequency that is displayed in greenindicates that the corresponding radio is selected(i.e., in use) on the audio panel (COM) or on theHSI (NAV).• An active frequency that is displayed in white indi-cates that the corresponding radio is not selected onthe audio panel (COM) or on the HSI (NAV).NOTE: In GPS mode, both active NAV frequenciesare displayed in white.Frequencies located in the standby field are displayedin white.3.4 TUNING BOXOn both the PFD and the MFD, a cyan (i.e., light blue)tuning box appears around the standby frequency fieldand can be moved from one standby frequency field toanother for the purpose of tuning or radio selection bypressing the dual COM or NAV knob.Frequency Toggle Arrow Tuning BoxFigure 3-3 Frequency Toggle Arrow and Tuning Box3.5 FREQUENCY TOGGLE ARROWIn both the COM and NAV windows, a FrequencyToggle Arrow appears next to the tuning box, betweenthe active and standby frequencies. Pressing the dualCOM or NAV knob toggles both the frequency tuning boxand the Frequency Toggle Arrow between the radios.NOTE: If the frequency tuning box is on a selectedCOM sub-window when a signal is transmittedfor this radio, the Frequency Toggle Arrow isreplaced by a TX indication.NOTE: Pressing the Frequency Toggle key placesthe standby frequency into the active field, andvice versa.3.6 RADIO STATUS INDICATIONS• TX – When a COM radio is keyed, a white TXindication appears to the right of the correspond-ing COM frequency for the duration of the signaltransmission.• ID – When the Morse code identifier is ON for aNAV radio, a white ID indication appears to theleft of the corresponding active NAV frequency andthe Morse code identifier for this frequency can beheard if the corresponding NAV radio is selected onthe audio panel.
