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190-01255-00 Rev. B
Garmin G1000H
™
Pilot’s Guide for the Bell 407GX
3
SYSTEM OVERVIEW
•
GSC 46
(1) – The GSC 46 is a signal conditioner which converts tachometer and engine torque information to
a digital format for use by the GEA 71H.
•
GRS 77H
(1) – Provides aircraft attitude and heading information via ARINC 429 to both GDU 1040H units
and the both GIA 63H units. The GRS 77H contains advanced sensors (including accelerometers and rate
sensors) and interfaces with the GMU 44 to obtain magnetic field information, with the GDC 74H to obtain air
data, and with both GIA 63Hs to obtain GPS information. AHRS modes of operation are discussed later in this
document.
•
GMU 44
(1) – Measures local magnetic field. Data is sent to the GRS 77H for processing to determine aircraft
magnetic heading. This unit receives power directly from the GRS 77H and communicates with the GRS 77H,
using an RS-485 digital interface.
•
GMA 350H
(1) – Integrates NAV/COM digital audio, intercom system and marker beacon controls. This unit
communicates with both GIA 63Hs, using an RS-232 digital interface.
•
GTX 33H/ES
(1) – The GTX 33H/ES is a solid-state, Mode-S transponder that provides Modes A, C and S
operation. The unit is controlled through the PFD and communicates with both GIA 63Hs through an RS-232
digital interface. Extended Squitter (ES) provides ADS-B output.