3 WLAN Mode
3.6 Modulation Analysis Measurement
NOTE
The entered value in Trace Points is immediately translated into the current
domain units for setting the value of the marker. The marker’s value in domain
units, NOT trace points, is preserved if a change is made to the X Axis scale
settings. Thus, if you use this command to place a marker on point 500, which
happens at that time to correspond to 13 GHz, and then you change the Start
Frequency so that point 500 is no longer 13 GHz, the marker stays at 13 GHz,
NOT at point 500.
If the trace marker is on a 2-dimensional domain, the points are numbered in the
following way:
Starting at the minimum X and Z position, this point is numbered 0. Each time you
increment the point number, increment the X value to the next available value.
When X reaches the maximum X position, then reset X to the minimum and
increment the Z value. Then continue incrementing the X position in the same
manner as before.
Note that for symbol tables, which have no axes, incrementing the X position in
points moves the marker consecutively through all table entries.
Remote
Command
:CALCulate:EVM:MARKer[1]|2|…|12:X:POSition <real>
:CALCulate:EVM:MARKer[1]|2|…|12:X:POSition?
Example
:CALC:EVM:MARK:X:POS 25
:CALC:EVM:MARK:X:POS?
Notes When a marker mode is changed from off to any other mode, the X position is set to mid-screen
Preset None until marker is turned on
State Saved Saved in instrument state
Min Depends on trace data
Max Depends on trace data
Coupling of Delta and Reference markers
These coupling rules are for these reasons:
We want to make it convenient to turn on a delta marker measurement with a fixed
reference, and turn the fixed reference off when we're done.
Deltas have no good definition when the reference and the delta marker have
different dimensions.
We do not yet support cross-trace deltas even when domains have the same
dimensions.
We want to honor what the user has requested as reasonably as possible.
The following coupling rules apply from the front panel and also if the equivalent
SCPI commands are sent.
WLAN Mode User's &Programmer's Reference 960
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