103
8.4 Communication Methods
Data Formats The instrument uses character data and decimal numeric data,
depending on the command.
(1) Character Data
Character data always begins with an alphabetic character, and
subsequent characters may be either alphabetic or numeric.
Character data is not case-sensitive, although response messages
from the instrument are only upper case.
(2) Decimal Numeric Data
Three formats are used for numeric data, identified as NR1, NR2 and
NR3. Numeric values may be signed or unsigned. Unsigned numeric
values are handled as positive values.
Values exceeding the precision handled by the instrument are
rounded to the nearest valid digit.
• NR1 Integer data (e.g.: +12, -23, 34)
• NR2 Fixed-point data(e.g.: +1.23, -23.45, 3.456)
• NR3 Floating-point exponential representation data (e.g.: +1.0E-2,
-2.3E+4)
The term "NRf format" includes all three of the above numeric decimal
formats.
The instrument accepts NRf format data.
The format of response data is specified for each command, and the
data is sent in that format.
:ESR0 106
:FETCH? +106.571
The instrument does not fully support IEEE 488.2. As much as
possible, please use the data formats shown in the Reference section.
Also, be careful to avoid constructing single commands that could
overflow the input buffer or output queue.
:SYSTEM:OVC ON
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