Keithley 2001 Operator's Manual page 330

IEEE-488 Reference
Description
4-172
Note: The binary equivalent of this decimal value indicates which bits in the register are set. For
example, for an acquired decimal value of 516, the binary equivalent is 0000001000000100.
For this binary value, bits B9 and B2 are set.
These commands are used to set the contents of the event enable registers (see Figures 4-28
through 4-33). An :ENABle command is sent with the decimal equivalent of the binary value
that determines the desired state (0 or 1) of each bit in the appropriate register.
Each event enable register is used as a mask for events (see [:EVENt] for descriptions of
events). When a bit in an event enable register is cleared (0), the corresponding bit in the event
register is masked and thus, cannot set the corresponding summary bit of the next register set in
the status structure. Conversely, when a bit in an event enable register is set (1), the correspond-
ing bit in the event register is unmasked. When the unmasked bit in the event register sets, the
summary bit of the next register set in the status structure will set.
The decimal weighting of the bits for each event enable register are included in Figures 4-28
through 4-33. The sum of the decimal weights of the bits that you wish to set is sent as the pa-
rameter (<NRf>) for the appropriate :ENABle command. For example, to set the BFL and RAV
bits of the Measurement Event Enable Register, send the following command:
:stat:meas:enab 544
where; BFL (bit B9) = Decimal
RAV (bit B5) = Decimal
<NRf> =
Bit Position B15 - B12
Event
Decimal Weighting
Value
Value : 1 = Enable Measurement Event
0 = Disable (Mask) Measurement Event
cáÖìêÉ=QJOU
Measurement Event Enable Register
512
32
544
B11 B10 B9 B8 B7 B6
BPT BFL BHF BAV
2048 512 256 128
(2 ) 11 (2 ) 9 (2 ) 8 (2 ) 7
0/1 0/1 0/1 0/1
B5 B4 B3 B2 B1
RAV HL2 LL2 HL1 LL1
32 16 8 4 2
(2 ) 5 (2 ) 4 (2 ) 3 (2 ) 2 (2 ) 1
0/1 0/1 0/1 0/1 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
2001-900-01 Rev. K / August 2010
B0
ROF
1
(2 ) 0
0/1