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2.4.1 Computer Updating Of The Database
Update information is downloaded from the Honeywell
Internet site or sent to you on several 3.5" disks. In order
to use this update method you must have access to an
IBM compatible computer having a disk drive capable of
using and booting (loading) from 3.5" 1.44 megabyte high
density disks (when using 3.5" disks). This computer also
needs to have an available COM 1 or COM 2 serial port.
In addition, an interface cable that plugs into both the
computer and into the data loader jack on the front of the
KLN900 is required.
NOTE: Instructions for ordering the PC Data Loader Kit
(which includes the PC interface cable) appear in the
appendix on page F-3.
CAUTION: The database must be updated only while
the aircraft is on the ground. The KLN 900 does not
perform any navigation functions while the database
is being updated. Since a database update takes
approximately 10 minutes it is a good idea to turn off
all electrical equipment on the aircraft except for the
KLN 900 to avoid running down the aircraft battery.
NOTE: 3.5" disks can only be used to update one KLN
900, although they can update this specific unit numerous
times. The first time the disks are used in an update
operation, a unique identification code from the KLN 900
being used is uploaded to the disks. These disks may be
used in this specific KLN 900 an unlimited number of
times which could be required if you switch back and forth
between the Americas, Pacific, and Atlantic data bases
during one update cycle. These disks may not, however,
be used to update other KLN 900s. Similarly, a unique
identification code is encrypted into all database updates
downloaded from the Honeywell Internet site.
Follow these steps to update the KLN 900:
1. Plug the 9-pin female connector end of the interface
cable into a COM serial port of the computer. If the com-
puter has COM 1 and COM 2 serial ports, either may be
used. Some computers use a 9-pin COM serial port con-
nector while other computers use a 25-pin connector. If
the computer being used has a 9-pin connector, the inter-
face cable connector will plug directly into the computer's
9-pin connector. If the computer's COM serial port uses a
25-pin connector, use a 25-pin to 9-pin adapter to adapt
the interface cable's connector to the computer's connec-
tor.
2. Plug the other end of the interface cable (4 conductor
male plug) into the data loader jack on the front of the
KLN 900.
NOTE: The interface cable needs to be firmly pushed into
the jack.
2-4
Rev 2
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