Keysight A Series User Manual page 362

Over–the–Air Measurements (OTA) – LTE FDD Option 370, LTE TDD Option 371, 5GTF
Option 377 (CPU2 Only)
How to Set Up Over–the–Air (OTA) Mode Settings
362
a. Optional (When Display Type = Table or the More softkey is pressed
for the other Display Types): Modify RF attenuator, Preamp, and
other settings:
If Display Type = Table, then press
If Display Type = Bar Chart, Spectrum, or Strip Chart, then press
Scale/Amptd More
>
Then choose from the following:
— Press RF Atten
Set to 0 dB.
— Press Preamp
— Press Range
— Press Auto-Range
the optimal RF attenuation and preamp settings for the
current input signal.
Executing an auto-range does NOT change any of the display
settings (i.e., Ref Level, Scale or Ref Pos).
See also, "About the Auto-Range Feature" on page
— Press External Gain
b. Optional (When Display Type = Bar Chart): Modify scale and specify
color bar limit values—Modify the bar chart display color coding
scheme for the power channels (bars):
Press Trace > More
Then one of the following:
— CC to set the CC (Component Carrier) associated with each
bar.
— PCI to set the PCI (Physical Cell Identifier) associated with
each bar.
— Level to set the level of the value associated with each bar.
When level is selected, you can set the channels' red and blue
power level limits with the Scale/Amptd softkeys:
Press Scale/Amptd
Then one of the following:
— Red Limit to set the power level and color scale for high
power channels.
— Blue Limit to set the power level and color scale for low
power channels.
— Others: Scale,
Scale/Amptd
to set the attenuator power (default: –10 dB).
change to ON.
to set the absolute power (dBm)
Executes an auto-range, which determines
> Bar Color Coding
Ref Level, etcetera as desired.
Keysight N9927-90020 User's Guide
or
397.