190-00820-08 Rev. A Cirrus Perspective ™ by Garmin – Pilot’s Guide for the SR20/SR22/SR22T 129AUDIO PANEL AND CNSSYSTEMOVERVIEW FLIGHTINSTRUMENTS EIS AUDIO PANEL& CNS FLIGHTMANAGEMENT HAZARDAVOIDANCE AFCS ADDITIONALFEATURES APPENDICES INDEXAUTO-TUNING NAV FREQUENCIES ON APPROACH ACTIVATIONNOTE: The primary NAV frequency is auto-tuned upon loading a VOR or ILS/Localizer approach.NOTE: When an ILS/LOC approach has been activated in GPS Mode, the system switches to NAV Modeas the final approach course is intercepted (within 15 nm of the FAF). See the GPS Navigation Section fordetails.NAV frequencies are automatically loaded into the NAV Frequency Box on approach activation.When loading or activating a VOR or ILS/LOC approach, the approach frequency is automatically transferredto a NAV frequency field as follows:• If the current CDI navigation source is GPS, the approach frequency is transferred to the NAV1 or NAV2active frequency fields. The frequency that was previously in the NAV1 or NAV2 active frequency fields aretransferred to standby.• If the current CDI navigation source is GPS, and if the approach frequency is already loaded into the NAV1or NAV2 standby frequency field, the standby frequency is transferred to active.• If the current CDI navigation source is NAV1 or NAV2, the approach frequency is transferred to the standbyfrequency fields of the selected CDI NAV radio.MARKER BEACON RECEIVERNOTE: The marker beacon indicators operate independently of marker beacon audio and cannot be turnedoff.The marker beacon receiver is used as part of the ILS. The marker beacon receiver is always on and detectsany marker beacon signals within the reception range of the aircraft.The receiver detects the three marker tones – outer, middle, and inner – and provides the marker beaconannunciations located on the Audio Panel and to the left of the Altimeter on the PFD. Operation of the twomarker beacon indications may not be synchronized.Figure 4-31 Marker Beacon Annunciations on the PFDOuter MarkerIndication Middle MarkerIndication Inner MarkerIndication
