Garmin G1000 Pilot’s Guide for the Beechcraft 58/G58 190-00629-00 Rev. B3-4NAV/COMTUNING BOXA light blue tuning box is displayed around the radiostandby frequency window, on both the PFD and MFD.Pressing the small COM or NAV knob transfers the tuningbox back and forth between the two windows.Frequencies located in the standby window aredisplayed in either white or gray.• The standby frequency appearing in the tuning boxis white.• The other standby frequency is gray.Frequency Transfer Arrow Tuning BoxFigure 3-4 Frequency Transfer Arrow and Tuning BoxSWITCHING BETWEEN RADIOSPressing the small COM or NAV knob transfers thetuning box between the radio frequency windows.When a different COM transceiver is selected on theaudio panel, the COM frequency tuning box highlightsthe frequency on both the PFD and MFD.When a different NAV radio is selected on the HSI, theNAV frequency tuning box highlights the frequency onthe PFD and MFD. The NAV frequency tuning box doesnot change when GPS mode is selected.Figure 3-5 Switching COM RadiosPushing the small COM knob switches thetuning box from one COM radio to the other.Pushing the small NAV knob switches thetuning box from one NAV radio to the other.Figure 3-6 Switching NAV RadiosMANUALLY TUNING A FREQUENCYThe dual COM and dual NAV frequency knobs areused for manual COM and NAV radio tuning. Thefrequencies are tuned in the standby field.• The MHz frequency digits are tuned with the largeCOM and NAV knobs.• The kHz frequency digits are tuned with the smallCOM and NAV knobs.Turning the knobs clockwise increases frequency.Turning the knobs counterclockwise decreases frequency.
