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Chapter 3, HP-IB Command Guidelines
Guidelines for Operation
If it is not possible to properly convert all the values to the new unit-of-measure,
the Attribute Units are not changed and the following error is generated: HP-IB
Error: HP-IB Units cause invalid conversion of attr.
This error
is most often encountered when one of the Data Function values listed above is set
to zero. If this error is encountered, the programmer must change the Data
Function settings to values that can be converted to the new units-of-measure
before sending the :AUNits command to the Test Set.
For example, the following BASIC language program statements
1. reset the Test Set
2. set the Data Function default zero values to non-zero values
3. set the Attribute Units to DB
4. then query the value of each Data Function
The units of measure for the returned values will be DB.
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