Keysight A Series User Manual page 375

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
The Spectrum view in 5G TF uses a center frequency that is +2.6 MHz
offset from the carrier's center frequency. This is done so that FieldFox can
capture the necessary xPBCH (physical broadcast channel) information to
demodulate the signal. Be aware that all of the instrument's displayed
numbers are rounded to three significant digits (e.g., 5.0026 GHz is
displayed as 5.003 GHz).
IMPORTANT! When you select a multiple CCs (e.g., CC0, CC1, etcetera)
and record data, you may actually see other cell signals that do not have
sufficient power to be displayed, but are still detectable. When you select
ALL, multiple component carriers are selected, but the results of the
component carrier (CC) with the highest power is displayed. Refer to
Figure 13-7 on page
5. Optional: Press Sweep 3 and modify/select items:
6. Press
Keysight N9927-90020 User's Guide
— Strip Chart
— Then CC (select component carriers)
— All (Not applicable for Spectrum. When All is specified, for
Spectrum, the FieldFox defaults to CC0) or
— CC0, CC1, CC2, CC3, or
component carrier choices (CC5, CC6, and CC7))
— Then PCI All (select PCIs)
— All (Not applicable for Spectrum. When All is specified, for
Spectrum, PCI is set to single). For all other display types,
the results for any cells with any PCI are displayed (default
= All).
— Single
Repeat process as needed for additional Windows, Data, and CC settings.
368.
— Single
— Continuous OFF ON
— Restart
— Strip Points
— Log Meas Status OFF ON
Trigger Settings
— Freerun (default) or
— External sets a sweep to trigger on an external TTL signal at the
External Trigger connector. External trigger is available only after
initial setting.
CC4
displays the results for the selected PCI.
to ON (default)
(i.e., 5GTF has up to seven
375