Communication Direction Finding System
- Compact stand-alone system
- Single or dual receiver versions
- Wide frequency range
- Proven and reliable pseudo-Doppler method
- Mobile or stationary deployment
- Quick system set-up without tools
- Rugged and weather-proof construction
- Superior accuracy
- Real-time RF/Audio spectrum analyzer
- Mains power and battery operation
- Single or dual receiver configuration
- Integrated compass compensation
- Optional GPS logging
- Optional Client/Server control
- Optional triangulation and mapping
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The Communication Direction Finding system employs the proven pseudo-Doppler method, combined with statistical signal processing, to deliver a cost-effective, yet highly accurate DF solution for government, military, law enforcement and industrial applications. It can accurately find and pinpoint the exact location of targeted users of two way communication gear, with GPS accuracy.

The entire DF system comprises of fully integrated receivers, battery, charging unit and control circuitry in a compact sturdy carry case, ready for quick and easy deployment anywhere, with or without external power sources.
The fully weather-proof antenna system comes with a sturdy tripod and employs 8-pole arrays for HF/VHF and UHF frequency bands for maximum accuracy.
The main user interface of the DF system is designed around a virtual receiver control panel, making it possible to operate the system just like a conventional communications receiver.
For maximum operator convenience, the bearings are indicated in numerical format, both as instantaneous and averaged values.
The circular azimuth display, with a freely adjustable North reference, has an additional “polar mode”. This allows the user to assess the signal strength relative to the trace length. An adjustable trace decay time can assist with recognising random reflections.
The waterfall and histogram graphics give an instant overview of the signal bearing distribution over time, assisting in validating the quality of the signal azimuth indicators.

The receiver unit is housed in a sturdy high-impact transport case containing one or two receivers with associated antenna interface circuitry, power management system and a laptop. The built-in power management system allows operation from three sources: mains, vehicle battery or built-in rechargeable battery. The entire system is light-weight and easy to carry.
The system can be specified with a single or dual receiver configuration. In a dual receiver setup it is possible to monitor the demodulated audio signal of the received frequency, without any interference, which is inherent to the pseudo-Doppler technique.
There is also a GPS option available, which permits the logging of the measured azimuth values in relation to their GPS coordinates.
A software Client/Server Option is also available for remote control and data streaming. Using this option it is possible to control the DF system remotely via Ethernet interface.
Another software option, the Triangulation/Mapping Option, can be applied to determine an absolute position of a target by networking two or more receiver systems.

Technical specifications
DF frequency range
    100 - 1800 MHz* optionally extendable down to 2 MHz and up to 3500 MHz (receiver itself has a frequency range 9 kHz - 1800 MHz, extendable to 3500 MHz)
Modulation type    AM, AMS, LSB, USB, DSB, ISB, CW, FM-N, FM-W
Dynamic range
  90 dB
-113 dBm (FM, 400 MHz, 12 dB SINAD)
DF Methods   Pseudo-Doppler and Watson-Watt
DF Accuracy
   Minimum 2 degrees RMS (in reflection-free environment)
Control unit dimensions
  460 (W) x 330 (H) x 165 (D) mm 18.1" (W) x 13.0" (H) x 6.5"(D)
Control unit weight 
12.8 kg (28.2 lb)
Antenna random dimensions   Height: 355 mm (14.0")  Diameter: 505 mm (19.9")
Tripod height   2.0 m (6.6 ft) max.
Total antenna and tripod weight   16.1 kg (35.5 lb)

Ordering Codes - Description
SCPDF   Single-channel portable DF system 100 - 1800 MHz
DCPDF   Dual-channel portable DF system 100 - 1800 MHz
OPTUSA   Optional HF/VHF antenna 2 - 200 MHz
OPTSHF   Optional UHF/SHF antenna 1000 - 3500 MHz
OPTGPS   GPS option
CSOPT   Client/Server option
TMOPT   Triangulation/Mapping option