You can configure the E5072A by using various commands. Some commands require you to specify and work with a particular channel or trace, while other commands do not have this restriction.
Those commands that do not require you to specify a particular channel or trace apply to the currently active channels and traces. Therefore, before issuing such a command, you must make the appropriate channels and traces active.
To make a channel active, use the following command:
:DISP:WIND{1-160}:ACT
Only the currently displayed channels can be active channels. Therefore, you must display the desired channels by using the :DISP:SPL command before making them active.
To make a trace active, use the following command:
:CALC{1-160}:PAR{1-16}:SEL
Only the currently displayed traces can be active traces. Therefore, you must display the desired traces by using the :CALC{1-160}:PAR:COUN command before making them active.
You can also select a trace by the trace name, provided it has been defined earlier. To define a trace name, use the following command:
:CALC{1-160}:PAR{1-16}:TNAMe:DATA
If the trace name is not defined but used, the following error occurs:
'51, Specified trace does not exist'
If the defined trace name already exist, the following error occurs:
'63, Duplicate trace name'
Besides, you have an option to select the trace directly by using TRAC{1-16} for all SELected commands. As such, you do not need to make a trace active before assigning a command to it.
For example, to activate marker 3 in trace 2, channel 1, you can assign the command in two ways:
Option 1:
:CALC1:TRAC2:MARK3:ACT
Option 2:
:CALC1:PAR2:SEL
:CALC1:MARK3:ACT