Packaged Direction Finder Overview

Doppler Systems offers packaged systems allowing for easy installation and use our radio direction finding systems.  The packaged systems include a direction finding processor, an FM receiver, power distribution, a data interface to configure the system and obtain data from the system, and an appropriate antenna or antennas.  We also can provide laptop computers with our systems fully configured to interface with the direction finder and run our software.

A packaged system consists of the following items:

• A processor suite
• A fixed site or mobile kit

The table below is a sample of the available configurations. We offer other configurations with different cable lengths, computers, and data radios.  Please contact us with your needs.

Type	Frequency	Receiver	Cable Length	Laptop
Mobile	100 – 1000 MHz	AOR DV1	14 ft	none
Mobile	100 – 500 MHz	AOR DV1	14 ft	none
Mobile	500 – 1000 MHz	AOR DV1	14 ft	none
Fixed	115 – 1000 MHz	AOR DV1	100 ft	none
Fixed	115 – 500 MHz	AOR DV1	100 ft	none
Fixed	250 – 500 MHz	AOR DV1	100 ft	none
Fixed	500 – 1000 MHz	AOR DV1	100 ft	none
Fixed	115 – 1000 MHz	AOR DV1	100 ft	Dell Rugged Latitude
Fixed	115 – 500 MHz	AOR DV1	50 ft	Dell Latitude

Processor Suite

The Processor Suite includes all the components necessary for a direction finding system mounted in a chassis and pre-wired. The antenna connections and external interfaces to the laptop are provided through a simple panel on the front of the chassis. The chassis in turn is mounted in a rugged modified laptop Pelican case, but it may easily be removed by pulling two spring action pull pins on the sides of the case. A cover with a bale mounts over the chassis to protect the equipment inside.  The bale provides a way to prop the Pelican case lid open allowing operation of the direction finder without removing it from the case.  The same processor suite is used for both mobile and fixed site systems.

The figure below shows a typical arrangement of the equipment in the case.  Each component is mounted to the chassis using hook and loop (Velcro) connections.  The front panel provides:

• Connections for the direction finding antenna
• DC power connections
• Ethernet connection
• Audio output
• Auxiliary audio input
• Laptop power (20 Vdc)
• Data radio antenna connection
• Power and data connections for a GPS and compass

Fixed Site Kit

The Processor Suite and Fixed Site Kit comprise everything required to set up a single, dual, or three-band radio direction finding system.  The fixed site kit has two transit cases; one for the antenna and one for cables and accessories. 

The antenna case has room for a three antenna system with all the masts, frames, and biconical elements.  It has custom foam cutouts layered in the case to accommodate all the various parts of the fixed site antenna.  The case allows for easy packaging and transport of the fixed site antenna.

The case for the cables and accessories carries the GPS, the direction finder control cables, the mast clamps, and the coaxial cables for the direction finder. The kit is available for single, dual, and triple band antennas.

Mobile Kit

The mobile kit includes antennas for the bands to be covered, the mobile summer, the GPS receiver, the compass (optional), and all the cables necessary to setup and operate a mobile direction finder.  All of the equipment is packaged in a foam lined Pelican case.  Power cables are provided with cigar lighter plugs.  All antenna elements and cables are carried in a custom Mighty Pouch accessory bag. The figures below show a typical equipment complement. The mobile kit is available in a single, dual, or three-band antenna kit covering 100 MHz – 1000 MHz.