Fluke PM-3390B, PM-3380B, PM-3370B, PM-3394B, PM-3384B user manual Front panel simulation

USING THE COMBISCOPE INSTRUMENTS		3 - 7
Example for the instrument cursor settings:
Send → SYSTem:SET? 32	Queries the oscilloscope for the
	instrument settings of node 32, which are
	the cursor settings.
Read ← <settings>	Reads the cursor settings.
.
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Send → SYSTem:SET <settings>	Restores the cursor settings.

3.2.4Front panel simulation

This concept allows you to send commands that simulate the pressing of a front panel key. This method allows the remote operation to precisely match a front panel setup. In particular, this method can be used to access instrument functions that cannot be programmed directly by remote commands.

As described in the beginning of this section, there is a difference between the front panel operation and the remote control of an instrument. If you use the front panel simulation commands via the remote interface, be aware that no use can be made of the additional information that is presented on the screen of the oscilloscope. As this causes the front panel simulation method to be a tedious process, it is certainly not recommended as a common programming practice.

For example, the SYSTem:KEY 507 command switches the AVERAGE function on when it was switched off before. When this function was switched on before, the AVERAGE function is switched off. The effect of the SYSTem:KEY command completely depends upon the state of the instrument at the moment the command is received. In a remote programming environment it is not immediately clear whether a state is on or off. For that reason the command SENSe:AVERage ON is much better.

To select functions that cannot be programmed directly, you might use the front panel simulation commands. For example, the command SYSTem:KEY 4 switches the "noise suppression" option in the TRIGGER menu of the front panel ON or OFF.