AS 680/682
Description, Operation and Maintenance Supervisor Operation
ADS−B
5−13Ed. 10.07
BITE Status Value Indicator Color GS−Status
0xFFFFFFFF RED FAULT
0x00000000 GREEN OPERATIONAL
> 0x00000000 RED, YELLOW or BLUE FAULT, WARNING or MAINTENANCE
Table: BITE Status Value and Ground Station Status
The indicators of all resources switch to gray, if the BITE Status has the value 0xFFFFFFFF. This can
happen, if the ’BITE Status’ is requested too often (BITE Thread is busy), at boot time or for test pur-
poses, if the BITE test is disabled. The result is the Ground Station status ’Fault’.
There are three ways to request the BITE Status value:
S pressing the ’Get’ button next to the ’BITE Status’ field.
S pressing the ’Refresh’ button at the bottom of the page.
S enabling the polling mechanism (’Polling’ button) with the option button beneath the ’BITE Status’
field.
The polling mechanism arranges the TSC for periodic BITE status requests. The polling interval in
seconds can be changed in the entry field below the selection button (’Polling Rate’). The interval can
be changed either by pressing the up or down buttons or by typing the corresponding value into the
text field. The ’Set’ button has to be clicked to activate the change.
5.4.3.3 Bite Mask
The BITE Mask determines which of the BITE tests shall run.
Example: The BITE Mask value be set to 0x407F03EF. The prefix ’0x’ indicates, that the value is shown
in hexadecimal notation. Each bit of this value represents one resource and the value of the bits deter-
mine, whether the resource is monitored.
Non critical resources Critical resources
0x403C020F HEX = [0] 1 | 00 0000 0011 1100 | 0000 0010 0000 1111 binary notation
The lower 16 bits (from right to left) represent the ’critical resources’. Only these ’critical tests’, whose
corresponding bit is set to ‘1’, are performed. In this example, only the enabled 9 ’critical tests’ run
and yield an operational status. The remaining tests are disabled. Actually there are only 10 ’critical
resources’, so only 10 of the lower 16 bits are used. The remaining 6 bits are reserved.
The bits 17 to 30 represent the ’non critical tests’ depicted in the same way in the warning column
of the BITE page. Actually there are only 7 ’non critical tests’, so only 7 bits are used. The remaining
7 bits are reserved.
Bit 31 represents the maintenance test.
Press the ’Edit’ button next to the corresponding field to change the bite mask. The indicators of the
tests change to toggle buttons
. Each toggle button represents one bit in the BITE mask. A toggled
button sets the corresponding bit to ‘1’ or ‘0’. It is possible to change the BITE mask by pressing the
option buttons of the corresponding tests or by entering the BITE mask directly as hexadecimal string
into the textfield BITE Mask.
After pressing the ’Set’ button belonging to the respective BITE Mask, the option button of the test
changes back to an indicator again.
Updates on the option buttons changes the text field BITE Mask accordingly.
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