User manual

READ? command
:READ?
Description Typically, this command is used with the instrument in the “one-shot” mea-
surement mode to trigger and acquire a specified number of readings.
The :SAMPle:COUNt command is used to specify the number of readings
(see Trigger Subsystem). Note that the readings are stored in the buffer.
When this command is sent, the following commands execute in the order
that they are presented:
:ABORt
:INITiate
:FETCh?
When :ABORt is executed, if continuous initiation is disabled, the instru-
ment goes into the idle state. If continuous initiation is enabled, the oper-
ation re-starts at the beginning of the Trigger Model.
If the instrument is in the idle state, :INITiate takes the instrument out of
the idle state. If continuous initiation is enabled, (:INITiate:CONTinuous
ON), then the :INITiate command generates an error and ignores the
command.
See the :FETCh? command for more details. Note that an “Init ignored”
error will not cancel the execution of the :FETCh? command.
NOTE You cannot use the :READ? command if sample count >1 (see
Trigger Subsystem) and there are readings stored in the buffer
(error -225, out of memory). Either set sample count to one or
clear the buffer.
See Appendix C for an example program using the READ?
command.
2000-900 (J - Aug 2010) BOOK.fm Page 5 Wednesday, October 12, 2011 12:29 PM