EFD1000 Installation Manual
DOCUMENT # A-01-126-00 PAGE 173-225 Revision H
© Copyright 2009 Aspen Avionics Inc.
12.5 CDI and Bearing Pointer Source Selection
Overview
The pilot may couple navigation data from external GPS or VOR/Localizer (VLOC) radio
system to the HSI and bearing pointers. Navigation source selection is controlled by the
three buttons located between the control knobs.
The center button is used to control the source coupled to the Course Deviation
Indicator on the HSI.
The left button controls the source coupled to the single-needle bearing pointer.
The right button controls the source coupled to the double-needle bearing pointer.
Single-line BP
Source
CDI Nav
Source
Double-line BP
Source
Figure 12.4 – Navigation Source Selection Controls
Nav Source Selection
To couple a navigation source to a bearing pointer or the CDI press the associated
button to sequence between the available sources in a round-robin sequence. Available
sources are VLOC1, GPS1, VLOC2 and GPS2.
For integrated GPS/VHF radios, such as the Garmin GNS4xx/5xx, control of the data type
(i.e. GPS or VLOC) coupled to HSI course deviation indicator (but not for bearing pointers)
is controlled by the radio. When coupled to a radio of this type, the EFD1000 will not
toggle the operating state of the radio, but will annunciate the radio’s current operating
state in the CDI Nav Source display field. If the integrated radio is not reporting its
current state to the EFD1000, such as when the equipment is OFF, failed, or a GPS
waypoint has not been programmed, the EFD1000 will default to the VLOC mode.
Refer to the operating instructions or Aircraft Flight Manual Supplement for the
associated GPS or VLOC radio system for instructions on how to operate that equipment.
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