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Introduction to Programming - 6
67
SCPI Data Formats
All data programmed to or returned from the dc source is ASCII. The data may be numerical or character
string.
Numerical Data Formats
Symbol
Response Formats
<NR1>
Digits with an implied decimal point assumed at the right of the least-significant digit.
Examples: 273
<NR2> Digits with an explicit decimal point. Example: .0273
<NR3> Digits with an explicit decimal point and an exponent. Example: 2.73E+2
Parameter Formats
<Nrf> Extended format that includes <NR1>, <NR2> and <NR3>. Examples: 273 273. 2.73E2
<Nrf+> Expanded decimal format that includes <NRf> and MIN MAX. Examples: 273 273.
2.73E2 MAX. MIN and MAX are the minimum and maximum limit values that are
implicit in the range specification for the parameter.
<Bool> Boolean Data. Example: 0 | 1 or ON | OFF
Suffixes and Multipliers
Class
Suffix Unit Unit with Multiplier
Current A ampere MA (milliampere)
Amplitude V volt MV (millivolt)
Time S second MS (millisecond)
Common Multipliers
1E3 K kilo
1E-3 M milli
1E-6 U micro
Response Data Types
Character strings returned by query statements may take either of the following forms, depending on the
length of the returned string:
<CRD>
Character Response Data. Permits the return of character strings.
<AARD>
Arbitrary ASCII Response Data. Permits the return of undelimited 7-bit ASCII. This data
type has an implied message terminator.
<SRD>
String Response Data. Returns string parameters enclosed in double quotes.