Keysight Technologies C Series - Page 372

372 Keysight N9915-90020 User’s Guide
Over–the–Air Measurements (OTA) – LTE FDD Option 370, LTE TDD Option 371, 5G TF
Option 377, 5G NR / 5G NR EVM Conducted Option 378
How to Set Up Over–the–Air (OTA) Mode Settings
— Ref Level Manually set the value of the reference line. Enter a
negative value by pressing Run/Hold (+/-)
either before or
after typing a value.
— More opens a menu of softkeys that are the same as those
that are defined when the Display Type = Table.
— Others (optional): Autoscale
d. Optional (When Display Type = Strip Chart): Modify RF attenuator,
Preamp, and other settings:
Press Scale/Amptd
Then press the following:
—
Scale Manually enter a scale per division to view specific
areas of the trace.
— Ref Level Manually set the value of the reference line. Enter a
negative value by pressing Run/Hold (+/-)
either before or
after typing a value.
—
More opens a menu of softkeys that are the same as those
that are defined when the Display Type = Table.
— Others (optional): Autoscale
e. Optional (When Display Type = Constellation or Frame Summary):
Modify RF attenuator, Preamp, and other settings:
Press Scale/Amptd and
Then choose from the following:
— Press
Range to set the absolute power (dBm)
— Press
External Gain
10. Optional: Modify scale and specify color bar limit values—Modify the scale
and assign colors to low and high power channels (bars):
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, Ref Level, etcetera as desired.
11. Optional (i.e., If the Scan Results table does not populate): Press Meas
Setup 4
— LTE FDD and LTE TDD: