Airplane Flight Manual Supplement

AFMS, GARMIN G500/G600 SYSTEM 190-00601-01 Rev. K
FAA APPROVED Page 16 of 51
1.11 High Speed Data Bus Interface
Some Garmin equipment connected to the G500/G600 system utilizes the High
Speed Data Bus (HSDB) interface. HSDB is similar to an Ethernet bus and
provides a high-speed interface between Garmin avionics. Like Ethernet, data
between two units may be passed through intermediate “hub” units. Interfaced
equipment that uses HSDB includes the GTN 6XX/7XX navigators, GDL 69
datalink receiver, GDL 88 ADS-B transceiver, GWX 68/70 weather radar, and
GTS 8XX traffic systems.
The HSDB interfaces are installed to so that maximum data path redundancy is
achieved. However, depending on the number of HSDB units installed, failure
of one HSDB unit may result in loss of data on the G500/G600 from
“downstream” HSDB units. Any loss of data will be annunciated on the
G500/G600.