Garmin GTR 225 Installation Manual

Also see for GNC 255: Pilot's guide

Contents

Garmin GTR 225 Installation Manual Manual pdf 48 page image

GTR 225/GNC 255 TSO Installation Manual 190-01182-02Page 5-10 Rev. B5.2.5.5 COM REMOTE TUNE UP*COM REMOTE TUNE UP* discrete input may be used to scroll through a list of preset COM frequencies.A momentary low on this pin will load the next preset frequency in the list into the standby COMfrequency field.5.2.5.6 COM REMOTE TUNE DOWN*COM REMOTE TUNE DOWN* discrete input may be used to scroll through a list of preset COMfrequencies. A momentary low on this pin will load the previous preset frequency in the list into thestandby COM frequency field.5.2.6 VOR/ILS Audio500 VOR/LOC AUDIO OUT HI supplies 100 mW into a 500 load. It is a balanced output and the500  VOR/LOC AUDIO OUT LO output must be connected.5.2.7 VOR/ILS Discrete InputsThis input is considered active if either the voltage to ground is ≤3.5 VDC or the resistance to ground is≤375 . This input is considered inactive if the voltage to ground is 11-33 VDC or the resistance to groundis >100k Ω.An asterisk (*) following a signal name denotes that the signal is an Active-Low, requiring a ground toactivate.5.2.7.1 VOR/LOC REMOTE TRANSFER*VOR/LOC REMOTE TRANSFER* discrete input may be used to flip-flop between the active and standbyNAV frequencies. A momentary low on this pin will load the standby NAV frequency into the active NAVfrequency field.Pin Name Connector Pin I/O500 Ω VOR/LOC AUDIO OUT HI P2002 16 Out500 Ω VOR/LOC AUDIO OUT LO P2002 17 OutPin Name Connector Pin I/OVLOC REMOTE TRANSFER* P2002 28 In