News

All credit for this article goes to Alan Beresford (author) and the Grampian Online of HNMedia.co.uk. We received permission to post the article in full on our site. The original article can be found here. Training exercise turns real for Buckie lifeboat after distress beacon detected A TRAINING exercise for Buckie’s RNLI volunteer lifeboat crew turned real when a signal from a distress beacon was picked up. The William Blannin and her crew were on a training Read more…

The California Office of Emergency Services (CAL OES) deployed mobile Doppler Systems radio direction finders at the 2022 Major League Baseball’s All Star Game. Communications are vital for large events like these where both intentional and unintentional interference can cause disruptions impacting the safety of everyone involved in the event. Doppler Systems provides affordable and quick to deploy radio direction finders allowing public service communications professionals to quickly find and eradicate interference sources. Contact us Read more…

The California Office of Emergency Services, in cooperation with the FCC, deployed one Doppler fixed site direction finder and three Doppler mobile direction finders at the Super Bowl. The direction finders were used to find interfering signals to help enforce the frequency allocations given to the various mobile radio users. Doppler Systems is proud to have been a part of Super Bowl LVI

We’re moving! Doppler Systems is moving from its old address in Carefree, Arizona to a new location at the University of Arizona Tech Park in Tucson. We will officially occupy our new space on December 1, 2021. We are excited for the future of Doppler Systems. The University of Arizona Tech Park allows us to expand resources for customer visits and training opportunities. In addition, the area offers access to a diverse array of technical Read more…

Today, Doppler Systems provided five, three-band mobile radio direction finders to the California Office of Emergency Services. Doppler is proud of our long standing relationship with CAL OES providing both fixed and mobile direction finders.

Recently, a customer questioned us on our direction finder’s bearing stability over temperature. Over the years we’ve made some significant improvements in our summing unit so we thought it would be a good time to test the temperature performance of the direction finder. To perform the test, we mounted a fixed site (8 antenna) summing unit in our thermal chamber. We then connected our antenna simulator to the summing unit and connected the summing unit Read more…

The availability of inexpensive transceivers has resulted in increased jamming of critical public service radio services.  Utilizing Doppler Systems’ radio direction finders allows you track down interference and criminal jamming quickly, so you can get your critical radio systems back online. In May 2020, Allen county sheriff’s officers received complaints from fire and law enforcement entities of radio interference issues. Luckily they were able to locate the radio interference problem after a few days. See Read more…

Many times we’ve been asked why we use biconical antennas for our fixed site antennas. The short answer is that compared to a dipole the biconical antenna provides superior sensitivity over the entire bandwidth of the antenna. We’ve published an application note that puts some numbers to our claim. Take a look at our Sensitivity of Doppler Direction Finder with Biconical Antenna application note

The FCC has selected Doppler Systems to furnish a suite of fixed site radio direction finders.  These fixed site direction finders are designed for quick setup and disassembly, allowing the FCC to rapidly move them to locations of opportunity.  Doppler Systems is proud to partner with the FCC in supplying them with highly accurate, professional quality direction finding equipment designed to meet their needs.  Disclaimer: This disclaimer is required by Contract No. 273FCC20P0084. The Federal Read more…

Amcept, LLC’s SigTrax apps now work with Doppler’s DDF6000 and DDF7000 series processors.  SigTrax is a map-based signal tracking tool kit available for both IOS and Android devices.  SigTrax has an intuitive user interface that is designed to be simple and easy to use and can be customized using the Settings function.  Using it with the DDF7000 series processors requires the purchase of the DataTrax option which is available in the store section of the Read more…