Sandel ST3400, Руководство по установке

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The RA1 FAIL input is located on J2. The input is normally connected to the RA
indicator power at either the RA R/T unit or the RA indicator. When < 10VDC
this signal will cause the RA input to assume the FAIL state regardless of the
state of the signal or Valid input.
The radar altimeter always produces a ‘500’ audio callout during descent to
landing. Optionally the installer may select any or all of the following additional
audio callouts when the aircraft is in a descent in the landing configuration:
400’, 300’, 200’, 100’, 50’, 40’, 30’, 20’, 10’
An additional discrete input is available for connection to a Decision Height
setter. The ST3400 will provide an audio callout “MINIMUMS” when Decision
Height input is asserted.
Note: The Radar Altimeter model must be able to provide information to the
ST3400 through at least 2000’. Check the Radar Altimeter installation manual
3.10 Heading System
Heading input is required. Heading information is used to obtain magnetic
direction of the aircraft for use by the RMI. The Heading information may be
available from many sources, such as AHRS, INS, and Slaved Compass systems.
The ST3400 has provisions for up to two simultaneous Heading System input ports.
The primary input port is located on J-1 and the optional port is located on J-2.
Either one may be from an ARINC 429 or XYZ (ARINC 407) source configurable
in the Maintenance Menu pages. A list of supported Labels is given in an Appendix
of this manual.
The XYZ (ARINC 407) is dependent on availability of 26VAC excitation for
proper operation. In addition, an optional Gyro Valid input (DC level sensitive) is
provided if available from the gyro either valid High or Low. If no valid is
provided by the Gyro then valid NONE is selected.
If after 10 seconds no valid XYZ signal is being received an on-screen error
message is generated
3.11 ADF Receiver
The input of the ADF information is optional and not required for the Class A or
Class B TAWS compliance. It is used in an application where the ST3400 is used
to replace an existing RMI and ADF operation is desired or required.
The ST3400 has provisions for up to two simultaneous ADF Receiver ports. The
optional primary port is located on J-1 and the optional secondary port is located on
J-2. Either one may be from an ARINC 429, DC Sin/Cos, or XYZ (ARINC 407)
sources. For analog DC Sin/Cos or XYZ receivers, an optional ADF Valid input is
supported if the receiver supplies a compatible signal
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ST3400 INSTALLATION MANUAL 82002-IM-L