Flight Management System - Honeywell SPZ-8000 Maintenance Manual

echo attenuation compensation technique (REACT) mode automatically
increases receiver gain as a function of attenuation due to intervening
rainfall. At the point where the receiver can no longer detect levels
less than red, a blue field is displayed indicating an out-of-calibration
region. Target alert (TGT) mode is selected to indicate when level 3
(red) or greater weather is present in a sector beyond the currently
displayed range. Another feature of the P-870 is automatic tilt which
provides optimum tilt angle for any selected range.
2. H. FMZ-800 Flight Management System
The FMZ-800 Flight Management System (FMS) consists of the following
components:
. CD-81O Control Display Unit
NZ-920 Navigation Computers
. DL-800/900 Data Loader
. PZ-800 Performance Computers
. SM-81O Servo (Autothrottle)
The FMS provides lateral and vertical navigation guidance for display and
coupling to the DAFCS. The CD-81O Control Display Unit (CDU) provides
the primary means for pilot interface with the system and displays the
selected flight plan data.
The navigation computer can interface with five long range sensors, three
via ARINC 429 buses and two over the ASCB bus. Each navigation computer
can also connect to dual Collins Proline 2 or Bendix/King DME receivers
and a single VOR receiver. The interface to the IRS, Air Data, EDS, and
DAFCS is over the avionics standard communications bus (ASCB). Flight
plans are also transferred between navigation computers over the ASCB,
while the link to the performance computer and CDU is over an RS-422
'private-line' interface. To provide high accuracy long range
navigation, the navigation computer is designed to connect to IRS,
Omega/VLF sensors plus VOR/DME. With links to the on-board navigation
sensors, the navigation computer develops an FMS position based on a
blend or mix of the sensors. The FMS does not directly display
navigation maps on the CDU; however, the FMS is the source of map data
for other cockpit displays such as EDS. Display of map data is achieved
by the utilization of the internal database and ASCB 1/0. A large
portion of the navigation database is subject to updating on a 28-day
interval. The DL-800/900 Data Loader is used for this purpose.
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Apr 15/93
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