Agilent Technologies E4406A VSA manual Example Telnet Session

Programming Fundamentals

Using the LAN to Control the Analyzer

The small program above sets the analyzer to measure a signal in the frequency domain, places a marker on the maximum point, and then queries the analyzer for the amplitude of the marker.

You need to press Enter after typing in each command. After pressing Enter on the last line in the example above, the analyzer returns the amplitude level of the marker to your computer and displays it on the next line. For example, after typing CALC:SPECTRUM:MARK:MAX? and pressing Enter, the computer would display:

+1.71000000000E+002

When you are done, close the telnet connection. Enter the escape character to get the telnet prompt. The escape character (Ctrl and "]" in this example) does not print.

At the telnet prompt, type quit or close.

The telnet connection closes and you see your regular prompt.

Connection closed.

Figure 2-2shows a terminal screen using the example commands above.

Figure 2-2 Example Telnet Session

NOTE	If your telnet connection is in a mode called "line-by-line," there is no
	local echo. This means you will not be able to see the characters you are
	typing on your computer’s display until after you press the Enter key.
	To remedy this, you need to change your telnet connection to
	"character-by-character" mode. This can be accomplished in most
	systems by escaping out of telnet to the telnet> prompt and then
	typing mode char. If this does not work, consult your telnet program’s
	documentation for how to change to "character-by-character" mode.

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