Keysight Technologies C Series - Page 404

404 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 EMF Mode Settings (Requires EMF (Option 358) and 5G NR (Option
378))
— Press Import Antenna to import the antenna factors from the
antenna’s memory over the USB connection (this may take 5
seconds or so and vary with the Triaxial antenna).
— Press Antenna Select [Tri Axial] verify Tri Axial is selected (Default
== Manual).
— Optional: Press Antenna Axis the antenna axis should be set to Auto
for default operation. When AUTO is selected the application (e.g.,
Channel Power or OTA) controls the axes and switches themas
needed. With the AUTO setting, all antenna elements (X, Y, and Z)
are OFF.
— Press Back > Back to exit the EMF Antenna softkey menu.
4. Modifying the EMF settings:
Press Meas Setup 4
— Then More > EMF then
— EMF Meas OFF ON disable/enable the EMF measurement.
—
EMF Units choose dBuV/m (default) or V/m.
—
Back to exit to the previous softkey menu.
For more details on editing the USB antenna, refer to
Chapter 15, “USB
Antennas – (Full Capability Requires EMF Option 358, and either SA mode
(Option 233 Mixed Analyzers) or OTA—5G NR / 5G NR EVM Conducted
Option 378).”
5. Once you have finished with your USB antenna setup:
a. Press Sweep 3 > Single > Restart
The FieldFox should display in order Analyzing CCO X-Axis,
Analyzing CCO Y-Axis, and Analyzing CCO X-Axis and then
do a square root sum of the X, Y, and Z measurement values in the
FieldFox. Multi-cell measurements are done similarly for each cell
ID (i.e., Cell CC0 to CCn). Refer to Figure 13-31 on page 405.
b. Verify OTA 5G NR X, Y, and Z Axes Factors in SA Mode (e.g., 3.5 GHz
signal)). Refer to
Figure 13-32 on page 406.
i. Press Mode
> SA then
If the antenna factor import is successful, the FieldFox displays:
"Success: Antenna Factors Imported: Tri-Ax Antenna ID:
->[R] Antenna ID: SDIA-6000-1006 ->[]". The last 4-digits will vary
for each antenna (i.e., “1006” is changeable).
If the FieldFox displays this error Error: USB antenna Error: Not
found or Unable to communicate with antenna. Ensure it is
connected. is displayed, verify the USB antenna is connected correctly.
Refer to
“Troubleshooting” on page 416.