Occasionally we are asked about how we build and test our products. So, I thought I’d share a little about our design and manufacturing process. We design all our products locally using in house engineers and some outside consultants. This includes all the schematic design, printed wiring board design and Read more
We’ve just released version 2.34 of the firmware. This version fixes two recently discovered bugs. Bug 1 occasionally caused the DF processor to miss commands sent to it by the software. This occured when the commands were sent rapidly and the underlying Windows IP socket chose to buffer the first Read more
Some people insist that radio direction finders based on the Doppler principle suffer from low sensitivity. Recently I saw a claim from one of our competitors that their unit was 10 dB more sensistive than psuedo-Doppler based direction finders. This is simply not true, and our data backs it up Read more
Last week I attended the NSREN conference in Orlando. A big thanks to Paul Coburn for inviting us. During the discussion times a number of good ideas were suggested for improving our software. Throughout our history our customers have made suggestions for new features and new applications and our software Read more
We added a feature to the MPT User Interface program to allow a user to save the direction finder settings to a file. Once you have the direction finder settings the way you like them you can save them. If someone changes the settings you can always restore them to Read more
Recently someone made hoax calls to pilots, causing a passenger flight to abort landing as it approached Melbourne Airport in Australia. In total there were 15 unauthorized transmissions on aircraft frequencies in the Melbourne area (see article here). The Australian Communications and Media Authority deployed a Doppler Systems radio direction Read more
Frequently we are asked, “What antenna spacing should I use for my mobile antennas?” This is a good question because many people think that antenna spacing would be critical for good performance and people are surprised when our answer is, “Somewhere between an 1/8 and 1/4 wavelength.” In this post Read more
Over the years many of our customers have asked about mounting the DF antenna on the side of a tower or mast. Will it work? The short answer is not very well. We’ve posted the results of some extensive modeling we’ve done to predict the error associated with side mounting Read more
We released TargetTrack 3.2.0 last week. Several of our users had requested that we improve our bitmap based mapping functions. The previous versions of TargetTrack limited the map file size and the level of zooming. The new version allows for much larger file sizes and considerably more zoom levels. We’ve Read more
Welcome to the Doppler Systems blog. Our blog will give us the opportunity to keep you up to date on our latest products and software releases as well as offer helpful hints to enable you to use our products more effectively. Thank you for visiting and contact us if we Read more