Commands - Fluke 1620A-H User Manual

8 Digital Communications Interface

Commands

have alternate forms. Most mnemonics have a long form that is more readable
and a short form consisting of three or four characters that is more efficient.
A mnemonic may end with a numeric suffix that specifies one of a set of inde-
pendent function blocks such as input channel data paths. If a numeric suffix is
omitted when a particular block must be specified, an error is generated
("Header suffix out of range").
Query commands are commands that request data in response. Query com-
mands have a question mark (?) immediately following the command header.
Responses to query commands are generated immediately and transmitted over
the communication interface. Responses are terminated with a carriage return
(the serial interface can be configured to also send a new line character).
Many commands require parameter data to specify values for one or more pa-
rameters. The command header is separated from the parameter data by a space
(ASCII 20 hex, 32 decimal). Multiple parameters are separated by a comma (,).
This instrument does not allow compound commands (multiple commands per
line separated with semicolons). All commands are sequential; the execution of
each command is completed before subsequent commands are processed. Some
commands might take noticeable time to execute, during which time no other
commands will be executed.
Incorrect or invalid commands produce error messages that are stored in the er-
ror queue. The error queue can be read using the command "SYST:ERR?" (also
see Section 7.5.3, Comm Setting).
8.2 Commands
Table 4, Alphabetical List of Commands, lists the commands in alphabetical or-
der. In this section the commands are arranged into the following groups:
Alarm Commands - commands for alarm settings.
Measurement Commands - commands for reading measurement data.
Data Commands - commands for setting and reading data information
Measurement Control Commands - commands for the timing and action of
the measurement process.
Channel Commands - commands for selecting channels.
Calibration Commands - commands for calibration settings.
System Commands - commands for general system configuration parameters.
Communication Interface Commands - commands for controlling the inter-
face configuration (serial, LAN, and optional RF ports).
Date and Time Commands - commands for setting the date, time and the date
and time formats.
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