Sandel ST3400, Руководство по установке

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3.12 NAV Receiver and Glideslope
This information is required for Class A compliance and recommended for Class B.
The ST3400 has provisions for up to two simultaneous VHF Navigation and
Glideslope receiver ports; the primary receiver port on J-1 and the optional
secondary receiver port on J-2. Either one may be from an ARINC 429 or Analog
sources. The NAV input is used for the VOR bearing pointer. The Localizer and
Glideslope inputs are used for GPWS mode-5 alerting.
When an ARINC 429 receiver system is used, the same input will carry either VOR
or ILS data depending on the receiver tuning. See the appropriate manufacturers
manual to confirm the information from the navigation and Glideslope receivers.
Standard analog inputs for Glideslope deviation, Glideslope flag status, and
Composite Nav information are also provided and may be used instead of the
ARINC 429. If Composite Nav is used, these inputs are not on the same pins as
the Arinc inputs and are both located on P2.
An additional discrete input is available for Back Course from the HSI, which is
used to automatically disable Glideslope alerting while on a Back Course.
Note: The composite Nav input also decodes localizer when tuned.
3.13 Air Data Computer
See above discussion of “Altitude Sources”. Air Data Computer input is required
for Class A installations and Class-B installations without GPS altitude. For
Class-B installations with GPS altitude airdata may be used as a backup altitude
and VS source and is optional.
For Class-A installations using GPS altitude, the airdata system must at least
supply Vertical Speed and barometric altitude, either corrected or uncorrected.
For Class-A installations without GPS altitude, the airdata system must supply
Vertical Speed, Corrected Baro Altitude, and OAT. If OAT is not supplied by the
airdata system directly, a compatible OAT probe may be wired directly to the
ST3400.
The ST3400 has provisions for up to two simultaneous Air Data Computer ports
depending on model. The primary receiver port on J-1 and the optional secondary
receiver port on J-2. Primary Airdata may be from an ARINC 429, Manchester
or ARINC 565 secondary analog output source and Secondary Airdata maybe 429
or Manchester only, no #2 Airdata Analog input available.
3.14 OAT Probe
The ST3400 supports a single directly connected OAT probe to accommodate
airdata computers which supply Corrected Baro Altitude to the ST3400 but do not
supply OAT. See installation diagrams for information about compatible probes.
OAT is required only when using Corrected Barometric Altitude. If GPS Altitude
is used, no OAT probe is required.
82002-IM-L ST3400 INSTALLATION MANUAL
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