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Assume that this 32-bit value is FFF81
16
. Bit 0 is high (’1’) indicating
readings have wrapped around the segment. Bit 1 is low (’0’), indicating
that this segment completed normally and was not aborted (by the user with
the ABORt command).
The address returned is divided by 4 so that the aborted and wrapped bits
are discarded, and the address counter value of 3FFE0
16
(262112
10
)
remains. To retrieve the most recent 35 readings (with a circular buffer size
of 36), the address of the first reading to retrieve is calculated as:
starting address = address counter value - TRIGger:COUNt +buffer size
262112 - 35 + 36
starting address = 262113
Therefore, the DIAGnostic:FETCh? command would be executed as:
DIAG:FETC1? 262113,35
Chapter 3 Understandin
g
the HP E1429 Di
g
itizer 145