Preparing for Use
R&S
®
TSMA6
31
User Manual 4900.8057.02 ─ 06
To connect other test mobiles, refer to the R&S ROMES User Manual.
5.8
Enabling Untethered Dead Reckoning
The following steps are necessary to enable untethered dead reckoning with the inte-
grated 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 performed
in a safe environment.
a) 720 degrees right turn
b) 720 degrees left turn
c) Drive a straight line with a velocity exceeding 40 km/h.
Note:
Whenever the device is switched off, the calibration procedure must be
repeated for the next usage of dead reckoning.
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".
Enabling Untethered Dead Reckoning
