Instruction Manual

G1000 / GFC 700 System Maintenance Manual - 200/B200 Series King Air Page 7-61
190-00915-01 Revision 8
7.26 GTS 8XX Traffic System Functional Check
Perform the following tests to verify GTS 8XX operational and surveillance functions. Use a ramp tester
such as a TIC TR220 or equivalent to perform the tests.
To perform these tests, the aircraft must be on the ground and the GTS 8XX must be in Ground Test mode.
On the MAP-TRAFFIC MAP page of the MFD, press the softkey sequence: 3, 4, 4, 3
The GND TEST softkey will appear. Press the GND TEST softkey to activate Ground Test mode. This
simulates the GTS 8XX to be airborne at 50,000 feet with a magnetic heading of 0 degrees. To exit the
Ground Test mode, press the GND TEST softkey again.
Figure 7-17, GTS 8XX GND TEST softkey
7.26.1 Antenna Verification
The following test assures the antennas and coaxial cables are properly connected. The GTS 8XX must be
in Ground Test mode.
1. On the MAP-TRAFFIC MAP page of the MFD, press the OPERATE softkey. A self test of the
antenna circuit is initialized. If the MFD displays FAILURE at the upper left corner of the traffic
display area, it will be necessary to recheck the coaxial connections. If MFD displays OPERATE
without indicating a fault, proceed to the next step of antenna verification.
2. Ensure that the transmitter or receiver (RX/TX) that you are testing is significantly closer to the
ramp tester than another operating RX/TX, or erroneous and inaccurate results may occur. All
four quadrants (0, 90, 180 and 270 degrees) will be similarly tested to verify bearing of simulated
intruder supplied via the ramp tester are correctly displayed on the MAP-TRAFFIC MAP page of
the MFD.