User`s manual

78 Chapter 3
O:\Manuals\E6380A_Progguid\Book\Guidelin.fm
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.
Display Units and HP-IB Units are not affected when changing
Attribute Units.