Av. Kit Install. Manual
190-00067-62 Rev. E
Page 22
4.3.6 ALTITUDE INPUT TEST (GNC 250/GNC 250XL only)
Select the Gray Code Altitude Test Page if this input is used. Verify that the altitude
input is reading the correct altitude. NOTE: This does not display serial altitude.
4.3.7 OBI TEST
Select the OBI Test Page. Using the controls on the UNIT front panel, make the
selections indicated below and verify the interfaces as appropriate:
OBI Data
VALID
Ensure that the OBI indicates the proper value
INVALID
Ensure the OBI is invalid
OBI Value
Ensure that the OBI displays the value entered
when the VALID option is selected
NOTE: The 3 lines that make up the OBI interface may be toggled individually.
This may be done from the Value field. Cycle this field to the desired line (either
CLOCK, DATA or SYNC) and toggle the output to HIGH or LOW.
4.3.8 SIGNAL ACQUISITION TEST
The Self Test Page will be displayed followed by the Data Base Page. Upon approval
of the Data Base Page, the Satellite Status Page will be displayed. If unable to
acquire satellites, relocate the aircraft away from obstructions which might be
shading reception. If the situation does not improve, check the antenna
installation.
Once GPS position information is available, use the DIRECT-TO key to activate
the navigation function to a nearby NAVAID, intersection, or airport. Ensure any
connected equipment is transmitting data to and/or is receiving data from the
UNIT and is functioning properly (see the Pilot's Guide for more information on
the DIRECT-TO function).
4.3.9 OPTIONAL VHF COMM INTERFERENCE EVALUATION
The below evaluation is included for installation information only. It can be used
as a means to gauge VHF COMM interference and, in conjunction with Section
2.1.5, be used to improve an installation. Passing the below evaluation is not required.
a) Go to the Satellite Status Page, verify that 7 to 8 satellites have been
b) See that the NAV flag is out of view
c) Select 121.15 MHZ on COMM1
Summary of Contents for GNC 250
Page 24: ...Av Kit Install Manual 190 00067 62 Rev E Page 24 FIGURE 1 1 PINOUT DEFINITION 37 PIN DSUB ...
Page 26: ...Av Kit Install Manual 190 00067 62 Rev E Page 26 FIGURE 1 3A INTERCONNECT SCHEMATIC ...
Page 27: ...Av Kit Install Manual 190 00067 62 Rev E Page 27 FIGURE 1 3B INTERCONNECT SCHEMATIC ...
Page 28: ...Av Kit Install Manual 190 00067 62 Rev E Page 28 FIGURE 1 4 INTERCONNECT SCHEMATIC NOTES ...
Page 32: ...Av Kit Install Manual 190 00067 62 Rev E Page 32 FIGURE 3 3 COAX CABLE INSTALLATION ...
Page 34: ...Av Kit Install Manual 190 00067 62 Rev E Page 34 FIGURE 3 5 AVIATION RACK INSTALLATION ...
Page 42: ...Av Kit Install Manual 190 00067 62 Rev E Page 42 ...
Page 43: ...Av Kit Install Manual 190 00067 62 Rev E Page 43 ...
Page 44: ...Av Kit Install Manual 190 00067 62 Rev E Page 44 ...
