Model 2750 Multimeter/Switch System User’s Manual
Status Structure
11-5
Programming and reading registers
Programming enable registers
The only registers that can be programmed by the user are the enable registers. All other
registers in the status structure are read-only registers. The following explains how to
ascertain the parameter values for the various commands used to program enable registers.
The actual commands are covered later in this section (
A command to program an event enable register is sent with a decimal parameter value
that determines the desired state (0 or 1) of each bit in the appropriate register. The bit
positions of the register (
) indicate the binary parameter value. For example, if
you wish to set bits B4, B3, and B1, the binary value would be 11010 (where B4=1, B3=1,
B1=1, and all other bits are 0).
The binary value is then converted to its decimal equivalent:
Binary 11010 = Decimal 26
includes the decimal weight for each register bit. To set bits B4, B3, and B1,
the decimal parameter value would be the sum of the decimal weights for those bits
(16 + 8 + 2 = 26).
Figure 11-2
16-bit status register
(2
7
)
(2
6
)
(2
5
)
(2
4
)
(2
3
)
(2
2
)
(2
1
)
(2
0
)
(2
15
)
(2
14
)
(2
13
)
(2
12
)
(2
11
)
(2
10
)
(2
9
)
(2
8
)
32768 16384
Bit Position
Binary Value
Decimal
Weights
B7
B6
B5
B4
B3
B2
B1
B0
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
128
64
32
16
8
4
2
1
B15
B14
B13
B12
B11
B10
B9
B8
8192
4096 2048
1024
512
256
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
Bit Position
Binary Value
Decimal
Weights
B. Bits 8 through 15
A. Bits 0 through 7
2750-900-01.book Page 5 Wednesday, August 3, 2011 7:56 AM
Summary of Contents for 2750
Page 3: ...2750 900 01 book Page 2 Wednesday August 3 2011 7 56 AM...
Page 7: ...2750 900 01 book Page 4 Wednesday August 3 2011 7 56 AM...
Page 17: ...2750 900 01 book Page 10 Wednesday August 3 2011 7 56 AM...
Page 324: ...12 CommonCommands 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 348: ...15 SCPIReferenceTables 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 374: ...B Model7700ConnectionGuide 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 386: ...C StatusandErrorMessages 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 394: ...D SignalProcessing SequenceandDataFlow 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 408: ...E MeasurementConsiderations 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 428: ...G IEEE 488BusOverview 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
