3 VMA Mode
3.2 Custom OFDM Measurement
Option Frequency Range MaxBW
Option B3X 380 MHz ~ 550 MHz 100 MHz
550 MHz ~ 1310 MHz 200 MHz
1310 MHz ~ 5930 MHz 300 MHz
5930 MHz ~ 6000 MHz (6080 MHz- center frequency) * 2
Option B6X 380 MHz ~ 550 MHz 100 MHz
550 MHz ~ 1310 MHz 200 MHz
1310 MHz ~ 5780 MHz 600 MHz
5780 MHz ~ 6000 MHz (6080 MHz- center frequency) * 2
Option B12 380 MHz ~ 550 MHz 100 MHz
550 MHz ~ 1310 MHz 200 MHz
1310 MHz ~ 2000 MHz 600 MHz
2000 MHz ~ 5480 MHz 1200 MHz
5480 MHz ~ 6000 MHz (6080 MHz- center frequency) * 2
Optimize EVM
This is an "immediate action" function to optimize EVM for the current input signal.
It is used to set the combination of the preamp, mechanical and electronic
attenuation, and IF gain value based on the measured signal peak level. Its purpose
is to get better EVM results by improving the SNR and avoid ADC overload at the
same time.
After this control is pressed, "Pre-Adjust for Min Clipping" on page 1773 changes to
OFF and "IF Gain" on page 535 Auto changes to Manual.
NOTE
Before selecting the Optimize EVM function, the "EVM Optimization Method" on
page 492 should be selected.
Remote Command
[:SENSe]:OFDM:OPTimize
Example
:OFDM:OPT
EVM Optimization Method
There are 2 methods for EVM Optimization:
NORMal Adjusts hardware settings to minimize EVM by an algorithm that is dependent on the
measured peak power of input signal
ITERative Adjusts hardware settings to minimize EVM by an algorithm that iterates measured
EVM of input signal
Vector Modulation Analyzer Mode User's &Programmer's Reference 492
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