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1594A/1595A Super-Thermometer
Interface Commands
70
8.7 Interface Commands
An alphabetical listing of the commands implemented by the Super-Thermometer is shown in Table 19 on
page 70. These commands can be used with all of the remote operation ports. An example and description
of each command is included following the Remote Operations Command table.
8.7.1 Command Syntax
The Super-Thermometer accepts commands that set parameters, execute functions or respond with requested
data. Commands are in the form of strings of ASCII-encoded characters. Commands consist of a command
header and, if necessary, parameter data. All commands must be terminated with either a carriage return
(ASCII 0D hex or 13 decimal) or new line character (ASCII 0A hex or 10 decimal). Letter characters in com-
mands are not case sensitive.
Command headers consist of one or more mnemonics separated by colons (:). Mnemonics use letter characters
and possibly numeric digits as well. Commands as published use abbreviated words for mnemonics. Only
the rst three or four characters of each word in a received command are recognized, and subsequent letters
are ignored. This allows a user to use the full word if desired, for instance “FETCH?” instead of “FETC?”. A
mnemonic may end with a numeric sufx that species one of a set of independent function blocks such as
input channel data paths. If a numeric sufx is omitted when a particular block must be specied, an error is
generated in the error queue (“Header sufx out of range”).
Query commands are commands that request data in response. Query commands have a question mark (?) im-
mediately following the command header. Some commands require parameter data to specify values for one or
more parameters. The command header is separated from the parameter data by a space (ASCII 20 hex or 32
decimal). Multiple parameters, when required, are separated by a comma (,).
This product does not support compound commands (multiple commands per line separated with semicolons).
All commands are sequential: the execution of each command and any associated response is completed be-
fore any subsequent command is processed.
Some commands may be password-protected, so that the associated setting cannot be changed without rst
issuing the password access enable command (SYST:PASS:CEN). Some commands may conditionally be
password-protected, depending on the associated group password protection setting. The level of password
protection is so indicated in the description for each command, unless the command is never protected. Read-
ing a setting is always allowed.
In the commands lists and descriptions that follow, brackets [] indicate optional usage. For a <boolean>
parameter, “0” or “1” is accepted, or alternately “OFF” or “ON”; a corresponding response to a query is either
“0” or “1” only. Many parameters may be given as “DEF”, “MIN”, or “MAX” to set the setting to its default,
minimum, or maximum value respectively. A setting’s default, minimum, or maximum value may be deter-
mined using the query form of the command and adding a parameter “DEF”, “MIN”, or “MAX” respectively.
8.7.2 List of Commands
The following table lists the commands in alphabetical order.
Table 19 Report Operation Commands
Command Function
Associated Setting or
Function (screen)
*CLS Clears all status registers and the error queue
*ESE Sets the Standard Event Status Enable Register
*ESR? Reads and clears the Standard Event Status
Register
*IDN? Reads the product information
*RST Resets operating settings to dened values
*SRE Sets the Service Request Enable Register
*STB? Reads the Status Byte Register