Support for the ICOM R30

We are very excited to announce the addition of the ICOM R30 to our receiver line up. The ICOM R30 is a compact and affordable receiver with the added bonus of a built in GPS. We control the receiver and charge its battery through the USB port. In locations with good GPS reception there is no need for a separate GPS. Version 2.40 of our processor firmware supports this receiver and is available on our Read more…

The AOR DV1 Receiver is now supported by the DDF7001 DF Processor

We are happy to announce the addition of the AOR DV1 to the receivers supported by the DDF7001 direction finder.  Version 2.37 of the firmware includes this receiver.  The firmware upgrade is available from upgrades.  The latest versions of MPT User Interface and TargetTrack are required as well. To use the DV1 a jumper must be removed from the DDF7001 processor.  Our application note Using the DDF7001 with a AOR DV1 Receiver describes how to Read more…

Doppler Systems Ships 300th DDF7000 System

We have recently built and shipped our three hundredth system using our DDF7000 series processor. Since 2000 Doppler Systems has delivered over 1200 direction finders to our loyal customers. Our DDF7000 continues to deliver exceptional performance at a price point that no other DF make can match.  Thanks to all our customers for your support!

Vendor Appreciation

Our success here at Doppler Systems requires a team effort.  Our vendors routinely go above and beyond all our expectations.  They are all based in the United States (most of them in the Phoenix area) and their contribution is key to us delivering high-quality radio direction finding equipment to our many customers.  So, we’d like to acknowledge them (in no particular order) QuikTek Assembly For nearly 10 years QuikTek assembly has been our contract manufacturer Read more…

We Now Support the ICOM R8600 Receiver

We recently added support for the ICOM R8600 receiver to the DDF7001 processor.  If you are interested in using this receiver please download the firmware upgrade (v 2.35) and the latest versions of the MPT User Interface and TargetTrack software. Let us know if you have any problems with the new software. If there are any additional receivers you want us to support, send us an email.

Partnership Change

Our founder David Cunningham has sold his share of Doppler Systems to Brenda Holmes.  Dave will continue to provide technical support and consulting.  Doug Havenhill will be responsible for the day-to-day operations of Doppler Systems.  Brenda will be responsible for development of the next generation of Doppler Systems radio direction finders.

Mobile Direction Finder Configurations

We sell our mobile direction finders in two different configurations: our component configuration and our packaged configuration.  The direction finding performance is identical for both configurations so why do we offer two configurations?  The answer boils down to customer needs and preferences.  The minimal component configuration consists of a direction finding processor, an antenna summing unit, and a set of antennas.  To this complement of equipment the customer adds a narrow band FM receiver and Read more…

In-band Interference from a Nearby Transmitter

In general it is not good practice to locate a transmitter close to a direction finding antenna.  But how close is too close?  We’ve updated our application note on this subject.  In the application note we calculate the separation required to insure that there is no damage to the direction finder.  We also calculate the level of desense caused by nearby tranmitters and the separation required to provide optimum direction finding performance.  If you are Read more…