Preparing for use
R&S
®
TSMA6
24
Getting Started 4900.8040.02 ─ 09
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).
4.10
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".
The GPS calibration is saved in the module. Whenever the device is
switched off, the calibration procedure must be repeated for the next usage
of dead reckoning.
Calibrating GPS for dead reckoning
