Req. 5.3.12.2.2: "Threshold Scan Parameters Stored in File"

The number of threshold points (minimum 5 and maximum 9) and their threshold DAC values, the number of samples for each data point (probably about 10, but it depends on the time), and the calibration DAC value for each GTFE shall be given by a file or files that can be updated via a command from the ground.

Basis (help)

[1] (3.1.3.2.2), [4] (5.4.14)

1: "Mission System Spec." (NASA 433-SPEC-0001)

3.1.3.2.2: "Calibration"

The GLAST system shall perform calibration observations as required during the course of the mission.

4: "LAT T&DF Subsystem Spec. - Level III Spec." (LAT-SS-00019)

5.4.14: "Calibration"

The dataflow system shall provide commands to calibrate and readout the sub-systems.

Context (help)

Test(s)

002a: Command Functional

This test shall verify that all LAT commands are exercised through the 1553 interface, with command execution and completion status reported in telemetry when command verification features are switched on. The test shall also verify that the SIU FSW validates commands and command parameters prior to command execution. Finally, the test shall verify that the SIU executes individual commands received directly from the SC or executes preprogrammed command sequences (block commands) when triggered by a command from the SC, and can properly execute single commands and block command items in an interleaved or serial fashion, as necessary.

014: LAT Diagnostic and Calibration Modes

This test shall verify that the SIU FSW properly transitions to Diagnostic and Calibration Modes upon command, then properly executes the requested diagnostic and calibration algorithms.