VeEX MPA User Manual page 480

MPA_e_manual_D07-00-129P_RevA00
number of errors for an event cross the threshold during the 15-
minute period the test records "fail"; if the errors do not exceed the
threshold the test records "pass."
The performance events continue to be counted to the end of the
15-minute period, at which time the current performance event
counts are stored in the historical registers and the current
performance event registers are reset to zero. After resetting the
registers to zero the 'pass' or 'fail' result records in the Prev15
column and the performance evaluation continues and records the
new result in the Cur15 column.
RTR15 Reset Threshold Report 15-minute evaluation period. There are one
RTR15 and one TR15 for each performance event.
The start and end time for the 15-minute evaluation window must
occur on the hour and at 15, 30, and 45 minutes with respect to the
elapsed time for each test. An RTR15 occurs at the end of a 15-
minute period in which the count is less than or equal to the reset
threshold and there has not been any unavailable time during that
period. An RTR15 can only occur subsequent to a 15-minute period
containing a TR15.
TR24 Threshold Report 24-hour evaluation period. There is one TR24 for
each performance event.
The start and end time for the 24-hour evaluation window must
occur on a 15-minute window boundary. TR24s occur as soon as
the 24-hour threshold is reached or exceeded.
Cur15 Displays the pass or fail state for the current 15-minute evaluation
period. After the evaluation period ends the registers reset to zero
and the pass/fail state records in the Prev15 column and the
performance evaluation continues.
Prev15 Displays the pass or fail state for the previous 15-minute evaluation
period. The history periods are used as a stack, i.e. the values held
in each register are pushed down the stack one place at the end of
each 15-minute period, and the oldest value at the bottom of the
stack is discarded.
Cur24 Displays the pass or fail state for the current 24-hour evaluation
period.
Prev24 Displays the pass or fail state for the previous 24-hour evaluation
period.
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