Avidyne IFD540 Manual de Instalação descarregar pdf (Página 162)

5-4 Navigation

NOTE

Manual Sequencing May Be Required

In Electro-mechanical installations where the IFD

does not have an altitude input, a CAS message

prompting the pilot to manually sequence legs of the

flight plan will be presented on Heading-to-Altitude

leg types (e.g. some missed approach legs). Since

the IFD does not know altitude in this case, it does

not know when to sequence to the next leg. Failure

to manually sequence to the next leg will result in

the IFD maintaining the leg heading indefinitely.

NAV SOURCE KNOB

The top right IFD knob is the dedicated IFD Navigation (Nav)

Source knob. Think of the nav source knob as a channel selector

to choose which Nav source the pilot wants depicted on the

moving map. The chosen source will also be sent to other on-

board systems like an EFIS (e.g. Aspen PFD) and in-turn, the

autopilot, as well as driving any conventional CDI or RMI or HSI

indicator. VLOC and GPS course and deviation data may all be

coming into the IFD continuously but the channel selector acts as

a filter to determine which one gets used in the nav solution and

displayed on the IFD. The nav source knob must typically be

twisted to select the desired state. The selected nav mode

indication will flash for several seconds before taking effect;

thereby giving you time to visually confirm the desired state.

Nav Source Knob State Indication

As described earlier in this section, multiple levels of aircraft

system integration are possible, and will affect the possible states

of the Nav Source knob. The table below describes all possible

nav source states:

1 2 ... 157 158 159 160 161 162 163 164 165 166 167 ... 225 226

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Avidyne IFD540 Manual de Instalação Página 162