Tektronix Keithley SourceMeter 2470, Справочное руководство

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2470 High Voltage SourceMeter Instrument Reference Manual Appendix B: Status model
2470-901-01 Rev. A /
May
2019 B-15
Using SCPI commands:
If you are using SCPI, you use the query commands in the STATus subsystem and common
commands to read registers.
Using TSP commands:
If you are using TSP, you print the TSP command to read the register. You can use either
print()
,
which returns the decimal value, or
print(tostring())
, which returns the string equivalent of the
decimal value.
You can also send the common commands to read the register.
For example, you can send any one of the following commands to read the Status Enable Register of
the Standard Event Register:
print(status.standard.enable)
*ese?
print(tostring(status.standard.enable))
Understanding bit settings
When you write to or read a status register, you can use binary, decimal, or hexadecimal values to
represent the binary values of the bit states. When the value is converted to its binary equivalent, you
can determine which bits are set on or clear. Zero (0) indicates that all bits are clear.
In the 2470, the least significant bit is always bit B0. The most significant bit differs for each register,
but in most cases is either bit B7 or bit B15.
Bit position
B7 B6 B5 B4 B3 B2 B1 B0
Binary value
1000
0000 0100
0000 0010
0000 0001
0000 1000 0100 0010 0001
Decimal value
128 64 32 16 8 4 2 1
Weight
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
Bit position
B15 B14 B13 B12 B11 B10 B9 B8
Binary value
1000
0000
0000
0000 0100
0000
0000
0000 0010
0000
0000
0000 0001
0000
0000
0000 1000
0000
0000 0100
0000
0000 0010
0000
0000 0001
0000
0000
Decimal value
32768 16384 8192 4096 2048 1024 512 256
Weight
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8