VXI VT1422A, Руководство пользователя

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VT1422A Command Reference 333 Chapter 7
[SENSe]
[SENSe:]DATA:CVTable:RESet
[SENSe:]DATA:CVTable:RESet
sets all 64 Current Value Table entries to the
IEEE-754 "Not-a-number."
Comments
•
The value of NaN is +9.037 (ASCII).
•
Executing DATA:CVT:RES while the module is INITiated will generate an error
3000, "Illegal while initiated."
•
When Accepted: Not while INITiated
•
Related Commands: SENSE:DATA:CVT?
•
*RST Condition: SENSE:DATA:CVT:RESET
•
Send with VXIplug&play Function: hpe1422_cmd(...)
Usage
SENSE:DATA:CVT:RESET
Clear the Current Value Table
[SENSe:]DATA:FIFO[:ALL]?
[SENSe:]DATA:FIFO[:ALL]?
returns all values remaining in the FIFO buffer until
all measurements are complete or until the number of values returned exceeds FIFO
buffer size (65,024).
Comments
•
DATA:FIFO? may be used to acquire all values (even while they are being made)
into a single large buffer or can be used after one or more DATA:FIFO:HALF?
commands to return the remaining values from the FIFO.
•
The format of values returned is set using the FORMat[:DATA] command.
•
Returned Value: ASCII values are returned in the form
±
1.234567E
±
123.
For example 13.325 volts would be +1.3001. Each value is followed
by a comma (,). A line feed (LF) and End-Or-Identify (EOI) follow the last value.
The data type is a
string array .
REAL 32, REAL 64 and PACK 64, values are returned in the IEEE-488.2-1987
Indefinite Length Arbitrary Block Data format. This data return format is
explained in “Arbitrary Block Program and Response Data” on page 233.
For REAL 32, each value is 4 bytes in length (the data type is a
float32 array ).
For REAL 64 and PACK 64, each value is 8 bytes in length (the data type is a
float64 array ).
Note
Values which are a positive overvoltage return IEEE +INF and a negative overvoltage
return IEEE -INF (see Table 7-1 on page 294 for actual values for each data format).