Measurement Computing Analyzer488 - Manual (Page 202)

Section 5 Analyst488 Software
5.14
Record : A dot will appear showing the on/off status of recording.
Trigger : A dot will appear showing if Triggering is being used.
Pre-Trigger Transactions : Indicates the number of bus events that
have occurred since the Record command was issued but prior to the
detection of the trigger point. This number may be in the range 0 to
99,999,999.
Available : Indicates the number of bus events still in record memory that
have been recorded prior to the detection of the trigger point. This number
may be in the range 0 to 32,767.
Post-Trigger Transactions: Indicates the number of bus events that
have occurred since the detection of the trigger point. This number may be
in the range 0 to 99,999,999.
Available : Indicates the number of bus events still in record memory that
have been recorded since the detection of the trigger point. This number
may be in the range 0 to 32,767.
Total Transactions : The sum of Pre-Trigger Transactions and Post-
Trigger Transactions. This number is in the range 0 to 99,999,999.
Available : Indicates the total number of bus events still in record memory
that were recorded since recording was enabled. This number may be in the
range 0 to 32,767.
Post-Trigger Transaction Time : This is the time between the
occurrence of the trigger word and the completion of the record sequence.
This time is measured in microseconds, with 2 microsecond resolution.
This time is displayed only at the end of a capture sequence that used
triggering. If triggering is not used, then bus event time is not measured.
Post-Trigger Bus Speed: The ratio of Post-Trigger Transactions to Post-
Trigger Transaction Time. This reading is the average bus data transfer
rate during the most recent record sequence. If the time is zero (no post-
trigger events), the speed is undefined and displayed as 0. The speed is
accurate only at the end of a capture sequence that used triggering.