Locked On Target
On this day I have an additional piece of gear installed in my radio stack in the form of a Doppler Direction finding unit, allowing me to track the RF signal that is being transmitted from a transmitter located some distance away from my location.
The DDFU is hearing the RF target via my Icom R5 communications receiver ( on this day) as seen just below my Kenwood TS-480.
Also connected to the DDFU is my laptop running Google Earth as displayed on the screen in real time, as I am connected to the Internet via my smartphone being used as a WiFi hotspot .
The DDFU also includes a GPS receiver and software that is installed on my laptop allowing for the RF target to be placed on the map showing the bearing and distance of the target from my mobile.
If you look at the display of the main unit mounted on the top of my radio stack, you can see that the RF signal is on a heading of 208 degrees, as indicated by the readout and the indicating LED's on the compass rose
Keep in mind that the front of my mobile is always facing North in the mind of the DDFU, and this is based on the positioning of the antennas and external controller mounted on the roof of my mobile.
The readout on the display of the software running on my laptop shows the actual heading of the RF target based on where North actually is, as this is required to place the RF target in the correct place on the map displayed on the screen of the laptop.
The reason the display on the laptop is not indicating the heading, but says 'SPD', is due to the fact my mobile is stopped and the speed has dropped below 3 MPH.
Once I am under way, the display on the screen of my laptop will begin reading out the heading to the target.
The insert photo shows the 4 antennas located on the roof of my mobile, that are connected via coax to the center controller also mounted on the roof, with the roof controller connected with a run of coax to the FM receiver at the radio stack.
The audio output of the FM receiver is connected to the DDFU mounted in my radio stack.
Now there is a whole lot more going on here, and later in the year I will be writing a review on this device.....stay tuned
Click on the photo for a closer look.....