R&S®DDF205 Digital Direction Finder

Accurate direction finding in a compact unit

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Key facts

Tried and tested technology used by 24 regulatory authorities worldwide
High-precision DF method at an excellent price/performance ratio (patented method)

Brief description

The R&S^®DDF205 combines the new, highly integrated R&S^®EB500 monitoring receiver with the accurate correlative interferometer DF method.

Features

Extended applications
Fast and reliable radiolocation due to high DF accuracy
Innovative DF antennas

Specifications

Frequency range, DF mode
base unit	20 MHz to 3 GHz
with R&S^®DDF205-HF option	300 kHz to 3 GHz
with R&S^®DDF205-FE option	20 MHz to 6 GHz
with R&S^®DDF205-HF and R&S^®DDF205-FE options	300 kHz to 6 GHz

Key facts

Tried and tested technology used by 24 regulatory authorities worldwide
High-precision DF method at an excellent price/performance ratio (patented method)
Reliable DF results even in difficult environments (e.g. urban areas with up to 50 % reflection)
Compact dimensions and low power consumption

Brief description

The R&S^®DDF205 combines the new, highly integrated R&S^®EB500 monitoring receiver with the accurate correlative interferometer DF method. This unique combination performs precise radio direction finding though it is compact and has low power consumption. Featuring wideband DF antennas and the ability to be powered from a DC source, the R&S^®DDF205 is also ideal for mobile applications.

Features & Benefits

Extended applications
- Fast spectrum monitoring with scan speeds of up to 12 GHz/s
- Display and demodulation of signals with up to 20 MHz bandwidth
- Wideband DF antennas and DC power supply capability for mobile operation
- Parallel monitoring and demodulation of one plus three signals within realtime bandwidth
- Online signal analysis with live streaming over LAN interface, e.g. with R&S^®CA100 and suitable options
  - Signal analysis and classification
  - Detection of modulation mode and transmission quality (eye diagram)
  - Extraction of signal content using bitstream analysis
- Offline signal analysis of recordings
Fast and reliable radiolocation due to high DF accuracy
- Use of high-precision correlative interferometer DF method
- Higher immunity to reflections due to DF antennas with a very large number of antenna elements
Innovative DF antennas
- Active/passive switchover with just a mouse click
- Exceptionally high DF sensitivity
- Integrated, extendible lightning protection
- Easy replacement of DF antennas
Effective measurements in line with ITU recommendations

The R&S^®DDF205 fulfills all ITU recommendations for direction finders and receivers:
- Option for comprehensive, ITU-compliant measurement methods including, for example:
  - Frequency and frequency offset, field strength, modulation, spectrum occupancy and bandwidth
  - Offline measurements on digitally modulated signals using the R&S^®CA100IS software and suitable options (in line with ITU recommendation SM1600)
Direction finding up to 6 GHz
- Fast, effective interference detection
High-resolution IF spectrum
- All details visible in DF mode

Specifications

Frequency range, DF mode
Frequency range	base unit	20 MHz to 3 GHz
	with R&S^®DDF205-HF option	300 kHz to 3 GHz
	with R&S^®DDF205-FE option	20 MHz to 6 GHz
	with R&S^®DDF205-HF and R&S^®DDF205-FE options	300 kHz to 6 GHz
Frequency range, receive mode
Frequency range	base unit	20 MHz to 3.6 GHz
	with R&S^®DDF205-HF option	8 kHz to 3.6 GHz
	with R&S^®DDF205-FE option	20 MHz to 6 GHz
	with R&S^®DDF205-HF and R&S^®DDF205-FE options	8 kHz to 6 GHz
DF mode
DF method	VHF/UHF/SHF	correlative interferometer
	HF	Watson-Watt
System DF accuracy¹⁾	depends on DF antenna (i.e. R&S^®ADD119, R&S^®ADD196, R&S^®ADD075), in reflection-free environment, with lightning protection, in line with report ITU-R SM.2125 (limited to one modulation type) and recommendation ITU-R SM.854
	300 kHz to 30 MHz	≤ 2° RMS
	20 MHz to 80 MHz	typ. 1° RMS
	80 MHz to 1.3 GHz	typ. 0.5° RMS
	1.3 GHz to 6 GHz	typ. 1° RMS
System DF sensitivity	depends on DF antenna (i.e. R&S^®ADD119, R&S^®ADD196, R&S^®ADD075), for 5º RMS DF fluctuation, 5 s integration time and 250 Hz (HF)/600 Hz (VHF/UHF/SHF) DF bandwidth, in line with report ITU-R SM.2125
	300 kHz to 80 MHz	typ. 14 µV/m to 4 µV/m
	80 MHz to 1.3 GHz	typ. 1 µV/m
	1.3 GHz to 6 GHz	typ. 2 µV/m
Realtime bandwidth for broadband direction finding	with R&S^®DDF205-WDF option	up to 20 MHz
Minimum signal duration	for single-burst signals, in line with report ITU-R SM.2125
	VHF/UHF/SHF	1 ms
	HF	2 ms
Receive mode
Analysis bandwidth		up to 20 MHz
Demodulation bandwidth		up to 20 MHz
Scan speed	with R&S^®DDF205-PS option	up to 12 GHz/s

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

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