Calibrating Gps For Dead Reckoning - R&S TSMA6 Getting Started

®
R&S TSMA6
For information how to connect Qualcomm based mobiles and required driver
updates, see https://www.rohde-schwarz.com/driver/tsma6/.
For information on how to connect other test mobile phones and install appropri-
ate drivers, refer to related manuals (e.g. R&S ROMES User Manual, R&S Smart-
Benchmarker User Manual).
To connect test mobile phones
► Connect test mobile phones to USB 2.0 / USB 3.0 / USB-C ports (see
ure 4-2 - 9, 10, 11).
3.13

Calibrating GPS for dead reckoning

The following steps are necessary to enable untethered dead reckoning with the
integrated receiver (see
TSMA6.
1. Mount the R&S TSMA6 device fixed to the frame of a car.
2. Power on the R&S TSMA6 device.
3. Activate "Dead Reckoning" in the used software (for details, refer to R&S
ROMES, R&S NESTOR or R&S ViCom documentation).
4. Wait until the used software reports a "3D fix" (time may vary depending on
the configured GNSS).
5. To calibrate the instrument, the following driving procedures have to be per-
formed in a safe environment.
a) 720 degrees right turn
b) 720 degrees left turn
c) Drive in a straight line with a velocity exceeding 40 km/h.
After finishing the calibration, the used software should report a fix state "GPS
+DR" or "3D+DR", in case satellite reception is lost the fix state will change to
"DR only".
If using "DR only", the accuracy of the reported position will decrease over
time. If it falls below a certain threshold, the receiver will report the state "No
Fix".
Getting Started 4900.8040.02 ─ 10
Chapter 4, "Instrument
Calibrating GPS for dead reckoning
tour", on page 31) of the R&S
Preparing for use
Fig-
29