R&S®DDF5GTS High-Speed Scanning Direction Finder

Fast, accurate direction finding

Overview
Models
Options

Key facts

Exceptionally fast DF scan speed thanks to three-channel architecture and wide realtime bandwidth
High DF accuracy, sensitivity and immunity to reflections
Integrated super-resolution DF method

Brief description

The R&S^®DDF5GTS high-speed scanning direction finder offers outstanding realtime bandwidth and DF scan speed as well as high DF accuracy, sensitivity and immunity to reflections.

Features

Direction finding of extremely fast frequency agile signals with high probability of intercept
Reliable DF results even in challenging environments
Super-resolution DF method

Specifications

Frequency range
Frequency range in DF mode	base unit	20 MHz to 6 GHz
	with R&S^®DDFGTS-HF option	300 kHz to 6 GHz

Key facts

Exceptionally fast DF scan speed thanks to three-channel architecture and wide realtime bandwidth
High DF accuracy, sensitivity and immunity to reflections
Integrated super-resolution DF method
Monitoring and DF performance in line with ITU recommendations and ITU Handbook on Spectrum Monitoring
Performance verification in line with ITU recommendations COMPANY

Brief description

The R&S^®DDF5GTS high-speed scanning direction finder offers outstanding realtime bandwidth and DF scan speed as well as high DF accuracy, sensitivity and immunity to reflections. Thanks to the integrated super-resolution DF method (availability on request), the direction finder is ideal for complex signal scenarios.

Features & Benefits

Direction finding of extremely fast frequency agile signals with high probability of intercept
- High DF scan speed thanks to 80 MHz realtime bandwidth
- Direction finding and location of frequency hopping transmitters with up to 2000 hops/s
- Direction finding and location of pulses with a duration of 10 µs
Reliable DF results even in challenging environments
- Higher immunity to reflections due to DF antennas with a very large number of antenna elements
- Stable bearings even with a 50 percent share of reflections
Super-resolution DF method
- Direction finding for co-channel signals
- Super-resolution DF method as standard
Innovative DF antennas
- Active/passive switchover with just a mouse click
- Exceptionally high DF sensitivity
- Integrated, extendible lightning protection
- Easy replacement of DF antennas
Precise direction finding of weak signals
- High DF sensitivity due to large number of antenna elements
- Adjustable coherent signal integration in wideband DF mode and DF scan mode for enhanced DF sensitivity
Accurate and reliable location of short-duration signals
- GPS-based synchronization of multiple R&S^®DDF5GTS (time-synchronized DF scan mode)
- Optional preclassifier for detecting LPI signals and summarizing individual results into a condensed result
Special and exceptionally powerful receive path for signal measurement
- Special and exceptionally powerful receive path
- Improved analog architecture of the receive path
- Especially powerful analog/digital converters
- Considerable advantages in the case of weak signals and dense signal scenarios
Effective measurements in line with ITU recommendations
- Compliance with all ITU recommendations for direction finders and receivers
- Option for comprehensive, ITU-compliant measurement methods
Receive mode with integrated antenna matrix
- Very fast panorama scan
- Integrated antenna matrix for connecting up to three VHF/UHF/SHF receiving antennas and up to three HF receiving antennas (option) in addition to the DF antenna
- Independent DDC channel
- Selection of the antenna element with maximum signal level
Signal analysis in parallel to direction finding
- Output of I/Q data for parallel signal analysis with R&S^®CA120 (available on request)
Powerful hardware developed by Rohde & Schwarz
- In-house development and manufacture of all DF system components, including the DF antenna
- Signal processing at maximum speed based on powerful FPGAs
- Use of powerful Rohde & Schwarz ASICs
- High immunity to strong signals thanks to sophisticated preselection

Specifications

Frequency range
Frequency range in DF mode	base unit	20 MHz to 6 GHz
	with R&S^®DDFGTS-HF option	300 kHz to 6 GHz
Frequency range in receive mode	base unit	20 MHz to 6 GHz
	with R&S^®DDFGTS-HF option	8 kHz to 6 GHz
DF mode
DF method	standard	correlative interferometer, Watson-Watt, super-resolution
	with R&S^®DDFGTS-VM option	vector matching
Realtime bandwidth	VHF/UHF/SHF	80 MHz
	HF	20 MHz
Instrument DF accuracy		typ. 0.2° RMS
System DF accuracy¹⁾	depends on DF antenna; here for example R&S^®ADD011SR (.1x), R&S^®ADD050SR, R&S^®ADD153SR and R&S^®ADD078SR, 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 1300 MHz	typ. 0.5° RMS
	1.3 GHz to 6 GHz	typ. 1° RMS
DF sensitivity	depends on DF antenna; for 2° RMS bearing fluctuation, 1 s integration time and 250 Hz (HF) or 600 Hz (VHF/UHF/SHF) DF bandwidth; here for example with R&S^®ADD011SR (.1x), R&S^®ADD050SR, R&S^®ADD153SR and R&S^®ADD078SR, in line with report ITU-R SM.2125
	300 kHz to 1300 MHz	typ. 0.7 µV/m
	1.3 GHz to 6 GHz	typ. 3 µV/m to 20 µV/m
DF scan speed in VHF/UHF/SHF (25 kHz channel resolution, 100% channel occupancy, correlative interferometer method, wideband fixed frequency mode)	base unit	60 GHz/s, in line with report ITU-R SM.2125
DF scan speed in HF (1.25 kHz channel resolution, 100% channel occupancy, Watson-Watt method, wideband fixed frequency mode)	base unit	10 GHz/s, in line with report ITU-R SM.2125
Minimum signal duration	for a single burst signal, in line with report ITU-R SM.2125
	base unit	1 ms
	with R&S^®DDFGTS-EMS option²⁾	60 μs
Minimum burst duration	for multiple burst signals	10 µs

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

2) The R&S^®DDFGTS-EMS option is subject to export control

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