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326 Keysight N9927-90001 User’s Guide

Over–the–Air Measurements (OTA) – LTE FDD Option 370 and 5GTF Option 377 (CPU2

Only)

Troubleshooting

If your OTA setup is not behaving as expected:

— Verify setup is correct by referring to “How to Set Up Over–the–Air (OTA)

Mode Settings” on page 294.

— Attenuator set to 0 dB

— Preamplifier set to ON

—Correct Band, Channel, and Center Frequency entered

— GNSS set to Internal

—Frequency Ref set to GPS

— For LTE FDD: Verify that the Frequency Error Threshold

(dB)—(FreqError Th) value is large enough or not too large

— For LTE FDD: Verify that the Extend Freq Lock value is enabled and

then adjust settings to improve your measurementFor 5GTF: Check

that the Frequency Correction Threshold value (%)— (Sync Corr Th %)

is small enough or not too large.

— ADC errors: Use Scale/Amptd

> Range to adjust the absolute power

level (dBm).

For some data views, you need to press More

to view the Range

softkey.

— No data displayed: Press Meas Setup 4

– Only required if scan does

not display data.

——LTE FDD: Press FreqError Th

and change to 5 kHz – Wait a few

seconds until table populates or set FreqLock Range

Extended

——Then change back to the desired Frequency Error

Threshold for your measurement.

——5GTF: Press SyncCorr Th

and change to 0% – wait a few

seconds until the Table populates and

——Then change back to the desired Sync Correlation

Threshold for your measurement.

Keysight Technologies FieldFox A Series User Manual

Questions and Answers: