Fetch - HP E1419A User Manual

Subsystem Syntax
Comments
Chapter 6

FETCh?

The FETCh? command returns readings stored in VME memory.
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This command is only available in systems using an HP E1405B or HP E1406A
command module.
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FETCH? does not alter the readings stored in VME memory. Only the *RST or
INIT... commands will clear the readings in VME memory.
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The format of readings returned is set using the FORMat[:DATA] command.
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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 Data" on page 6-185 of this
chapter. For REAL,32, readings are 4 bytes in length. For REAL 64, and PACK,
64, readings are 8 bytes in length.
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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 HP Workstation BASIC
and HP BASIC/UX. Refer to the FORMat command for the actual values for
NaN, +INF, and -INF.
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ASCii is the default format.
ASCII readings are returned in the form ±1.234567E±123. For example 13.325
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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.
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Related Commands: MEMory Subsystem, FORMat[:DATA]
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*RST Condition: MEMORY:VME:ADDRESS 240000;
MEMORY:VME:STATE OFF; MEMORY:VME:SIZE 0
HP E1419 Command Reference 231

FETCh?