Keysight N9927-90001 User’s Guide 273
Over–the–Air Measurements (OTA) – LTE FDD Option 370 and 5GTF Option 377 (CPU2
Only)
How to Set Up Over–the–Air (OTA) Mode Settings
How to Set Up Over–the–Air (OTA) Mode Settings
This section reviews the steps in setting up an OTA measurement. If you are not
familiar with this process or would like more information, refer to “How to
Define a Cell or Cell(s) and Use OTA”
This section consists of:
— “OTA Setup Procedure”
— “Optional: Using RTSA to verify the signal quality (Requires Option 350
and Preamp Option 235)”
OTA Setup Procedure
1. Modifying the Frequency Reference and GPS settings:
Press System
— Then System Configuration)
> GNSS (GPS+) > GNSS Receiver >
Internal
> Esc
— The left portion of the screen displays satellites and the
corresponding number on the adjacent Satellite Power
chart.
— The right portion of the screen displays Satellite Power
Carrier to Noise (C/No) dBHz values on the tops of the
satellite power chart.
— Then System
> System Configuration > Frequency Ref > Freq Ref
Source [GPS] >Back
Refer to “Example of the LTE FDD Scan Results Table (Five CCs and one
cell)” on page 279.
And, refer to “Example of the 5GTF Scan Results Table (Two cc and one
cell)” on page 280.
See also “GNSS (GPS+) and GPS” on page 526.
2. Selecting OTA mode:
— Press Mode_
.
IMPORTANT! See also, “Alignments” on page 180, in NA mode,Chapter 9,
“SA (Spectrum Analyzer) Mode,” and Chapter 10, “RTSA (Real-Time
Spectrum Analyzer) Mode—Option 350 (CPU2 Only)” mode.
IMPORTANT! It is not sufficient to be locked to the GNSS satellite, the
frequency reference must be locked to GPS.
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