Remote Control
Copyright © Itech Electronic Co., Ltd.
3
Otherwise an error of query interrupt will occur and missing data will not be
sent back.
1.3 Command format
Formats for command display are as follows:
[SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM}
[SOURce[1|2]:]FREQuency:CENTer
{<frequency>|MINimum|MAXimum|DEFault}
Based on the command syntax, most commands (and certain parameters)
are expressed in both upper and lower cases. Upper case refers to
abbreviation of commands. Shorter program line may send commands in
abbreviated format. Long-format commands may be sent to ensure better
program readability.
For example, both formats of VOLT and VOLTAGE are acceptable in the
above syntax statements. Upper or lower case may be used. Therefore,
formats of VOLTAGE, volt and Volt are all acceptable. Other formats (such
as VOL and VOLTAG) are invalid and will cause errors.
⚫
Parameter options with given command strings are included in the brace
({ }). The brace is not sent along with command strings.
⚫
Vertical stripes (|) separate several parameter options with given command
strings. For example, {VPP|VRMS|DBM} indicates that you may assign
"APP", "VRMS" or "DBM" in the above commands. Vertical stripes are not
sent along with command strings.
⚫
Angle brackets (< >) in the second example indicates that a value must be
assigned to the parameter in the brace. For example, the parameter in the
angle bracket is <frequency> in the above syntax statements. Angle
brackets are not sent along with command strings. You must assign a value
(such as "FREQ:CENT 1000") to the parameter, unless you select other
options displayed in the syntax (such as "FREQ:CENT MIN").
⚫
Some syntax elements (such as nodes and parameters) are included in
square brackets ([ ]). It indicates that these elements can be selected and
omitted. Angle brackets are not sent along with command strings. If no
value is assigned to the optional parameters, the instrument will select a
default value. In the above examples, "SOURce[1|2]" indicates that you
may refer to source channel 1 by "SOURce" or "SOURce1" or "SOUR1" or
"SOUR". In addition, since the whole SOURce node is optional (in the
square bracket), you can refer to the channel 1 by omitting the whole
SOURce node. It is because the channel 1 is the default channel for
SOURce language node. On the other hand, if you want to refer to channel
2, "SOURce2" or "SOUR2" must be used in the program line.
Colon (:)
It is used to separate key words of a command with the key words in next level.
As shown below:
APPL:SIN 455E3,1.15,0.0
In this example, APPLy command assigns a sine wave with frequency of 455
KHz, amplitude of 1.15 V and DC offset of 0.0 V.
Semicolon (;)
It is used to separate several commands in the same subsystem and can also
minimize typing. For example, to send the following command string:
TRIG:SOUR EXT; COUNT 10
has the same effect as sending the following two commands:
TRIG:SOUR EXT
