Keysight N9915-90020 User’s Guide 527
Direction Finding (Option 390 Time Difference of Arrival (TDoA)) – Requires Spectrum
Analyzer Mode (Option 233), and GPS Receiver (Option 307)
Time Difference of Arrival (TDOA) – (Requires Option 390)
Time Difference of Arrival (TDOA) – (Requires Option 390)
The Time Difference of Arrival (TDOA) measurements are generally used for
geo-locating RF sources. It requires three or more remote FieldFox units set up
as receivers (sensors) capable of detecting the signal-of-interest. All FieldFox
units are synchronized using a GPS signal.
The Spectrum measured by all FieldFox units selected is measured and used to
identify the signal of interest which is then geo-located using TDoA.
Learn more about time difference of arrival (TDoA) Option 390, by referring to
S9910A Keysight Signal Measurement Software (KSMS) web help
https://www.keysight.com/us/en/products/software/pathwave-test-softwar
e/pathwave-measurements.html
.
IMPORTANT! It is not sufficient to be locked to the GNSS satellite, the
frequency reference must be locked to GPS.