R&S®DDF04E Digital Direction Finder for Traffic Control

Radio direction finding on multiple channels

This is a discontinued product
More Information? Please contact us.

Key Facts

  • Parallel direction finding on up to 32 channels (optional) with the same high level of DF accuracy and sensitivity on all channels
  • Seamless coverage of a wide frequency range from 100 MHz to 450 MHz with only one DF antenna

Brief Description

The R&S®DDF04E represents the new generation of traffic control direction finders. Radio direction finding for air and maritime traffic control is performed simultaneously on multiple frequency channels using only one direction finder.

Features

  • One direction finder for all frequency channels with high DF accuracy and sensitivity
  • Wide frequency range with only one DF antenna: flexible and ready for future needs

Specifications

Base unit
Frequency range 100 MHz to 450 MHz
DF method correlative interferometer

Key Facts

  • Parallel direction finding on up to 32 channels (optional) with the same high level of DF accuracy and sensitivity on all channels
  • Seamless coverage of a wide frequency range from 100 MHz to 450 MHz with only one DF antenna
  • Future-ready due to simple change of the receive frequency and number of channels via the control software, as well as due to the forthcoming 8.33 kHz channel spacing that is already integrated
  • Standard PCs, monitors and network technology for control and display
  • Flexible networking of direction finder, data server and display units via Ethernet
  • Output of results on radar displays and in traffic management systems via an RS-232-C or TCP/IP interface

Brief Description

The R&S®DDF04E represents the new generation of traffic control direction finders. Radio direction finding for air and maritime traffic control is performed simultaneously on multiple frequency channels using only one direction finder.

Features & Benefits

  • One direction finder for all frequency channels with high DF accuracy and sensitivity
    • Parallel direction finding on multiple frequency channels with only one direction finder
    • The base unit features four user-configurable frequency channels and is optionally expandable to 32 channels
    • DF accuracy and measurement speed are equally high for all frequency channels
    • The R&S®DDF04E meets the requirements of the DFS Deutsche Flugsicherung GmbH (company responsible for air traffic control in Germany) and the recommendations of the ICAO and the ITU
    • The R&S®ADD050SR DF antenna, a wide-aperture system with nine antenna elements, features a high level of DF accuracy and sensitivity and outstanding immunity to reflections
    • Excellent large-signal immunity due to sophisticated preselection and extremely linear receivers
  • Wide frequency range with only one DF antenna: flexible and ready for future needs
    • Wide frequency range from 100 MHz to 450 MHz for simultaneously monitoring all important distress frequencies
    • Coverage of the entire frequency range with only one R&S®ADD050SR wide-aperture antenna
    • R&S®ADD153SR compact DF antenna for mobile applications
    • The forthcoming 8.33 kHz channel spacing for digital aeronautical radio is already integrated
    • The frequencies of the channels being monitored can be changed via mouse click
    • The number of channels being monitored can be increased by enabling a software option (additional hardware may be required for suppressing ground transmitter signals)
  • Simple networking and control
    • Networking of direction finder, data server and display units via LAN
    • Output of DF results on radar displays via RS-232-C or TCP/IP interfaces
    • Standard PCs, monitors and network technology for data distribution, control and display
  • Comprehensive selftest capabilities
    • Built-in test including permanent monitoring of more than 170 test points in the background and automatic generation of error messages
    • Integrated antenna radiator test to check the functionality of all DF antenna elements
    • Comprehensive R&S®DDF-SK service kit (option) for effective on-site troubleshooting

Specifications

Base unit
 
Frequency range   100 MHz to 450 MHz
DF method   correlative interferometer
DF accuracy 1) with R&S®ADD050SR
wide-aperture DF antenna
1° rms, typ. 0.5° rms
  with R&S®ADD153SR
mobile DF antenna
1° rms
DF sensitivity 2) 2° rms bearing fluctuation
25 kHz channel spacing
1 s integration time
5 µV/m
Minimum signal duration 2)   100 ms
Number of frequency channels base unit 4 frequency channels
  with R&S®DDF04E-4C option, multiple installations possible 4 additional channels per option enabled,
to yield max. 12 channels in total (up to 32 channels upon request)
Channel spacing selectable 25 kHz or 8.33 kHz
Linearity second-order intercept (SOI) typ. 63 dBm
  third-order intercept (TOI) typ. 28 dBm
Intermodulation-free dynamic range in-band, bandwidth 7.5 kHz typ. 85 dB
Phase noise at 10 kHz carrier offset typ. –120 dBc/Hz
Image frequency rejection   typ. 110 dB
IF rejection   typ. 110 dB
Operating temperature range outdoors
(DF antennas, cable set)
–40°C to +55°C
  indoors –10°C to +55°C
Storage temperature range   –40°C to +70°C
Humidity cyclic test at 25°C/35°C, EN 60068-2-30 max. 95 %
Installation altitude   max. 3000 m above sea level
Power supply   100 V to 230 V AC, +10 %/–15 %,
47 Hz to 63 Hz
Dimensions (approx.) direction finder 19" × 8 HU
  R&S®ADD050SR
DF antenna with lightning rod
3 m diameter × 3 m height
(118.1 in diameter × 118.1 in height)
  R&S®ADD153SR
DF antenna with lightning rod
1.1 m diameter × 1.3 m height
(43.3 in diameter × 51.2 in height)
Weight (approx.) direction finder 33 kg (72.75 lb)
  R&S®ADD050SR
DF antenna with lightning rod
70 kg (154.32 lb)
  R&S®ADD153SR
DF antenna with lightning rod
30 kg (66.14 lb)
Wind load R&S®ADD050SR DF antenna
without ice deposit
with 30 mm radial ice deposit

200 km/h: 1520 N/217 mm
180 km/h: 3400 N/221 mm
  R&S®ADD153SR DF antenna
without ice deposit
with 30 mm radial ice deposit

200 km/h: 270 N/189 mm
180 km/h: 530 N/192 mm

1) Measurement in reflection-free environment. The rms error is calculated from the bearings of evenly distributed samples versus azimuth and frequency.

2) The value depends on the number of frequency channels to be monitored. The specified value is based on an example with eight frequency channels in the civil air traffic control band.

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