IEEE-488 Reference
3-118
Bit B7, Buffer Available (BAV) —
Set bit indicates that there are at least two readings in the
trace buffer (PTR), or the buffer has become empty (NTR).
Bit B8, Buffer Half Full (BHF) —
Set bit indicates that the trace buffer is half full (PTR), or
that the buffer is no longer half full (NTR).
Bit B9, Buffer Full (BFL) —
Set bit indicates that the trace buffer is full (PTR), or that the
buffer is no longer full (NTR).
Bit B10 —
Not used.
Bit B11, Buffer Pretriggered (BPT) —
Set bit indicates that the trace buffer pretrigger event
has occurred (PTR), or the operations associated with the pretrigger have been completed
(NTR).
Bits B12 through B15 —
Not used.
Questionable Event Register:
Bits B0 through B3 —
Not used.
Bit B4, Temperature Summary (Temp) —
Set bit indicates that an invalid reference junction
measurement has occurred for thermocouple temperature measurements (PTR), or a subsequent
valid reference junction measurement has occurred (NTR).
Bits B5, B6 and B7 —
Not used.
Bit B8, Calibration Summary (Cal) —
Set bit indicates that an invalid calibration constant was
detected during the power-up sequence (PTR). The instrument will instead use a default calibra-
tion constant. This error will clear after successful calibration of the instrument.
Bits B9 through B13 —
Not used.
Figure 3-21
Measurement Event Register
RAV
B15 - B12 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
(2 )
9
(2 )
8
(2 )
7
(2 )
5
(2 )
4
(2 )
3
(2 )
2
(2 )
1
(2 )
0
32
0/1
Bit Position
Event
Decimal Weighting
Value
Value : 1 = Measurement Event Set
0 = Measurement Event Cleared
LL1
2
0/1
Events : BPT = Buffer Pretriggered
BFL = Buffer Full
BHF = Buffer Half Full
BAV = Buffer Available
RAV = Reading Available
HL2 = High Limit 2
LL2 = Low Limit 2
HL1 = High Limit 1
LL1 = Low Limit 1
ROF = Reading Overflow
BFL HL2 HL1 ROF
512 16 4 1
0/1 0/1 0/1 0/1
BHF BAV LL2
256 128 8
0/1 0/1 0/1
BPT
B11
(2 )
11
2048
0/1
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