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8.3 Interface Outline
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8.3.7 Data Formats
The 3332 uses character string data and decimal numeric data, and the type
used varies according to the command in question.
(1) Character data
Character string data must always begin with an alphabetic character, and
the following characters can be either alphabetic characters or numerals.
Although in character data either upper case letters or lower case letters are
accepted, response messages output by the 3332 are always in upper case
letters.
":DISPlay_ V ,A,W, FREQ "
(2) Decimal data
The numeric data values are all represented in decimal, in three formats
identified as NR1, NR2 and NR3, and each of these can appear as either a
signed number or an unsigned number. Unsigned numbers are taken as
positive.
Further, if the accuracy of a numerical value exceeds the range with which
the 3332 can deal, it is rounded off. (5 and above is rounded up; 4 and
below is rounded down).
① NR1 format: integer data (+12, -23, 34)
② NR2 format: fixed point numbers (+1.23, -23.45, 3.456)
③ NR3 format: floating point numbers (+1.E-2, -2.3E+4)
The term "NRf format" includes all these three formats.
When the 3332 is receiving it accepts NRf format.
All of the following examples set the voltage range to 150 V:
":VOLTage:RANGe_150"
":VOLTage:RANGe_150.002"
":VOLTage:RANGe_1.495E2"
When it is sending response messages it utilizes whichever one of the
formats NR1 to NR3 is indicated in the particular command.
This unit does not fully conform to IEEE488.2, and to the extent possible
should be used only for indicated reference data. Also, take care to ensure
that each command does not result in overflows of the input buffer and
output queue.
The conversion error when the numerical data is converted to the 3332
setting values is ±1dgt.
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