3-7
3.6.2
Device-Dependent Commands
The Device-Dependent commands for the 2251A are listed below, and grouped by category
in the following tables.
Table 3-5
Instrument Preset Conditions
Table 3-6
Instrument Preset Code
Table 3-7
Numerical Input Format
Table 3-8
Measurement Function Codes
Table 3-9
Numerical Input Ranges
Table 3-10
Resolution Control Selection
Table 3-11
Input Control Codes
Table 3-12
Measurement Control Codes
Table 3-13
Store and Recall Codes
Table 3-14
Special Function Codes
Table 3-15
Using the Special Function
Table 3-16
IEEE-488.2 Command Codes
Table 3-17
STA Related “Q” Codes
Table 3-18
2251A STA Response Description
Table 3-19
2251A STA Error Code Set
Table 3-20
Alphabetical List of Command Codes
Device-dependent commands are executed sequentially beginning with the first one sent and
ending with the last.
If more than one command is to be sent, no delimiters are required. If necessary, commas,
spaces, and semicolons may be included in the command strings for clarification without
affecting counter operation.
3.6.3
Command String Terminators
Each command string must be followed by an end-of-string terminating group. Table 3.4
shows the valid terminator groups.
Table 3.4 - Permitted Terminators
1
2
3
4
5
6
LF
LF
CR
CR LF
CR LF
Last Character
End Bit
End Bit
End Bit
End Bit
Where LF = Line feed, CR = Carriage Return
End Bit in VXIbus Data Low Register is Set
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