Command Execution; Command Notation - LeCroy 9410 Remote Control Manual

System Commands 5
COMMAND EXECUTION
COMMAND NOTATION
To delete a file from the memory card:
DELETE_FILE
To obtain a directory listing of the memory card:
DIRECTORY_LIST?
To format the memory card:
FORMAT_CARD
To identify the instrument:
*IDN?, *OPT?.
Before attempting to execute a command or query, the oscillo-
scope scans it to verify its correctness and that sufficient
information is given to perform the requested action. To protect
the local user from changes in the oscilloscope's behavior which
are beyond his control, the remote user must set the oscilloscope
to the remote state to execute commands that affect the operation
of the instrument as an oscilloscope. If such a command is re-
ceived while the oscilloscope is operating in the local state, an
execution permission error is generated and the execution of the
command is denied. Vice versa, the local user cannnot interfere
with the remote user because all front-panel controls :are disabled
while the oscilloscope is in the remote state.
Since interrogating the oscilloscope does not change its internal
state, it may be queried at any time, independently of local or
remote operation. There are only two exceptions to this rule: the
queries *CAL? and *TST? both recalibrate the oscilloscope and
are therefore executed in the remote state only.
Commands that only affect the remote behavior are executed in-
dependently of whether the oscilloscope is in the local or remote
state. In this category are all commands that modify communica-
tion parameters (COMM_FORMAT, COMM HEADER,
COMM_HELP, COMM_ORDER, COMM_RS232)~ all com-
mands affecting status information (*CLS, *ESE, INE, *OPC,
* PRE, * SRE, * WAI), and the commands used to display messages
on the screen to the local user (CALL_HOST, KEY, MESSAGE).
In the description of each command, only exceptions to the rule
that a command is executed only in the remote state and a query is
executed in both the local and remote states are mentioned.
The following notation is used in the description of the individual
commands :
< > Angular brackets enclose words that are used as placehold-
ers. There are two types of placeholders: (1) the header
path, (2) a data parameter of a command.
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