3 VMA Mode
3.2 Custom OFDM Measurement
The Iterative method is slower than the Normal method, but always results in better
EVM.
NOTE
"Optimize EVM" on page 492 is an “immediate action” function. Before selecting the
function, the EVM Optimization Method should be selected.
Remote Command
[:SENSe]:OFDM:OPTMethod NORMal | ITERative
[:SENSe]:OFDM:OPTMethod?
Example
:OFDM:OPTM NORM
:OFDM:OPTM?
Couplings Disabled when Component Carrier number is greater than one
Preset NORMal
State Saved Saved in instrument state
Range NORMal|ITERative
Iterative EVM Optimization Target
Specifies the component carrier that will be used as iterative EVM optimization
target.
Remote Command
[:SENSe]:OFDM:OPTimize:ITERative:TARGet CC0 | … | CC7
[:SENSe]:OFDM:OPTimize:ITERative:TARGet?
Example
:OFDM:OPT:ITER:TARG CC0
:OFDM:OPT:ITER:TARG?
Dependencies Invalid when EVM Optimization Method is Normal
Preset CC0
State Saved Saved in instrument state
Range CC0|CC1|CC2|CC3|CC4|CC5|CC6|CC7
Auto Couple
Immediately puts all Auto/Man functions into Auto. Auto Couple is confined to the
current measurement only. It does not affect other measurements in the Mode.
In the Auto state, Auto/Man functions are said to be “coupled”, meaning their values
change as you make changes to other values in the measurement. This helps ensure
accurate measurements and optimum dynamic range. Auto Couple is an immediate
action function, and when it is executed, all the Auto/Man controls for the current
measurement are set to Auto, and all measurement settings coupled to the
Auto/Man parameters are automatically set to their optimal values.
493 Vector Modulation Analyzer Mode User's &Programmer's Reference
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