VXI VT1422A - Manual (Page 293)

VT1422A Command Reference 291 Chapter 7
FETCh?
FETCh?
Subsystem Syntax FETCh? returns readings stored in VME memory.
Comments •
This command is only available in systems using an Agilent/HP E1405B/06A
command module.
•
FETCH? does not alter the readings stored in VME memory. Only the *RST
or INIT
… commands will clear the readings in VME memory.
•
The format of readings returned is set using the FORMat[:DATA] command.
•
Returned Value: REAL,32, REAL,64, and PACK,64, readings are returned in
the IEEE-488.2-1987 Definite Length Arbitrary Block Data format. This data
return format is explained in “Arbitrary Block Program and Response Data” on
page 233. For REAL,32, readings are 4 bytes in length. For REAL 64 and PACK,
64, readings are 8 bytes in length.
•
PACKed,64 returns the same values as REAL,64 except for Not-a-Number
(NaN), IEEE +INF, and IEEE -INF. The NaN, IEEE +INF, and IEEE -INF values
returned by PACKed,64 are in a form compatible with Workstation BASIC and
BASIC/UX. Refer to the FORMat command for the actual values for NaN, +INF
and -INF.
•
ASCii is the default format.
•
ASCII readings are returned in the form
±1.234567E±123. For example,
13.325 volts would be +1.3325000E+001. Each reading is followed by a
comma (,). A line feed (LF) and End-Or-Identify (EOI) follow the last reading.
•
Related Commands: MEMory Subsystem, FORMat[:DATA]
•
*RST Condition: MEMORY:VME:ADDRESS 240000;
MEMORY:VME:STATE OFF; MEMORY:VME:SIZE 0