User manual

IEEE-488 Reference
2001-900-01 Rev. K / August 2010 4-167
Bit B10  Not used.
Bit B11, Buffer Pretriggered (BPT)  Set bit indicates that the trace buffer pretrigger event has oc-
curred (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 measure-
ment 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 calibration constant. This
error will clear after successful calibration of the instrument.
Bits B9 through B13  Not used.
Bit B14, Command Warning (Warn)  Set bit indicates that a Signal Oriented Measurement Com-
mand parameter has been ignored (PTR), or a subsequent Signal Oriented Measurement Command has
executed successfully (NTR).
Note: Whenever a questionable event occurs, the ERR annunciator will turn on. The annunciator will turn
off when the questionable event clears.
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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Measurement Event Register