Viavi 87339, Operation Manual

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E - 1
Appendix E - Recording and Playing Trajectory Routes
Trajectory files recorded by GPS receivers or the GPSG-1000 and saved in the .gdt or
.nme format may be played back in the GPSG-1000 for simulation and testing of GPS
receivers. This appendix will detail the steps required to record a Trajectory route in the
GPSG-1000 GPS RX and playback the file for simulation.
Files saved from other GPS receivers may have .nmea file extension. When transferred to
the GPSG-1000 for playback they must be renamed with .mne file extension. See
Application Note: GPSG-1000 File Properties. Once renamed and transferred to the
GPSG-1000, they may then played in the same manner as files recorded by the GPSG-
1000.
The GPSG-1000 GPS RX will record its position and route. Attach the included GPS RX
antenna. From the Main Menu, select the down arrow (Figure E-1).
Fig. E-1 Main Menu