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Remote Operation

Examples: VOLT?, OUTPut ON.

Program Message Unit Separator (';'):

It separates the program message unit elements from one another in a program message.

Example: VOLT 110 ; FREQ 120 <PMT>

Program Message Terminator (<PMT>):

A program message terminator terminates a program message. Three permitted terminators are:

(1) <END>: end or identify( EOI).

(2) <NL>: new line, which is a single ASCII-encoded byte 0A (10 decimal).

(3) <NL><END>: new line with EOI.

Note : The response message is terminated by <NL> <END> for GPIB, <NL> for RS-232C.

6.4 Traversal of the Command Tree

Multiple program message unit elements may be sent in a program message. The first

command is always referenced to the root node. Subsequent commands are referenced to the

same tree level as the previous command in a program message.

Note that the common command and query headers do not affect the header path.

A column preceding a program message unit alters the header path to the root level.

For example:

(1) VOLT:RANG 150;LIM 140 <PMT> will set the output voltage to 150V range and the

maximum rms output voltage to 140V.

(2) CURR:PEAK 8;VOLT 110 <PMT> will set the output peak current to 8A and

generate a command error, because VOLTage is not a node at the current level.

(3) CURR:PEAK 8;:VOLT 110 <PMT> will set the output peak current to 8A and the

voltage to 110V.

(4) VOLT:RANG 300;*ESE 32;LIM 250 <PMT> will set the output voltage to 300V

range, the Standard Event Status Enable Register to 32, and the maximum rms output

voltage to 250 Volt.

Optional nodes in the tree will not alter the header path.

For example:

6-5

Chroma 6430 User Manual

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