User's Manual

Direction Finder RHOTHETA RT-400
RHOTHETA Page 11 of 18 User Manual
7 Mobile Use
7.1 Car Installation and Transport Position of the Antenna Unit
The optional RT-400 Car Mounting Kit must be installed on the roof railing of the car first. The
car mounting kit is prepared to be attached on standard roof luggage racks using tapped T-
heads
Note
Mounting technology might vary for some roof luggage racks.
In the next step, fix the RT-400 Antenna Unit using the quick clamp. Make sure the direction
marking (marking on the Antenna Unit) points towards the front side of the car.
Pull the detent pin and move the antenna to the horizontal transport position and fix it with the
included hook-and-loop tape. For non-operational road transport, the antenna should always
be in this position.
Connect the antenna to the power supply. The antenna may be powered through the external
DC power cable connected to a car DC outlet (e.g. cigarette lighter connection).
If using the DC power cable and feeding it through a door or window into the car, make sure
not to crush the cable.
The Tablet computer may be installed on the windshield using a car windshield tablet mount,
or on any other position the operator finds appropriate. Connection to the Antenna Unit is
through Wi-Fi, so no cable is needed.
Warning
Make sure the driver’s visibility through the car’s windshield and windows, and their
access to control elements, are not obstructed.
Note
If using a car DC outlet to supply the Antenna Unit, depending on your vehicle’s electrical
circuitry, the DC outlet might be interrupted under different conditions (ignition deactivated,
etc.). Every interruption of the DC outlet will interrupt the operation of the Antenna Unit
including the embedded Wi-Fi module. A later Wi-Fi reconnect to your Tablet computer might
be delayed up to one minute or more, which is a normal behavior of Android operating
systems.
7.2 Mobile Operation
For bringing the Antenna to the operational position and operating the system while mounted
on a car, release the hook-and-loop tape, pull the detent pin, and reposition the antenna unit
vertically. Make sure that the detent pin has snapped in. Also, make sure that the NORTH
marking on the antenna points towards the front of your car, otherwise, wrong bearings will be
indicated in your RT-400 DF Scout application.
Switch the power ON (Power switch on the RT-400 Power Pack or connecting the DC cable
to the car DC outlet).
Details on how to use the Tablet Software (RT-400 DF Scout) can be found in the DF Scout
User Manual.