R&S®DDF04E Digital Direction Finder for Traffic Control

Radio direction finding on multiple channels

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.