R&S®DDF550 Wideband direction finder

R&S®DDF550 Wideband direction finder
Open Lightbox
R&S®DDF550 Wideband direction finder
Open Lightbox
R&S®DDF550 Wideband direction finder
Open Lightbox
R&S®DDF550 Wideband direction finder
Open Lightbox
R&S®DDF550 Wideband direction finder, Front viewR&S®DDF550 Wideband direction finder, Front viewR&S®DDF550 Wideband direction finder, Side viewR&S®DDF550 Wideband direction finder, Back view

Key facts

  • High DF accuracy, sensitivity and immunity to reflections
  • High DF scan speed due to outstanding 80 MHz realtime bandwidth (V/U/SHF)
  • Easy integration into mobile platforms 
  • DF antennas with integrated, extendible lightning protection
  • Direction finding of signals in the frequency range up to 6 GHz

Fast and precise direction finding

The fast R&S®DDF550 wideband direction finder offers outstanding realtime bandwidth and DF scan speed as well as high DF accuracy, sensitivity and immunity to reflections.

Features & benefits

High DF scan speed

Direction finding of short-duration signals

  • High probability of interception
  • High DF scan speed due to outstanding 80 MHz realtime bandwidth
  • Direction finding of short-duration and frequency agile signals with high probability of intercept
  • Enhanced measurement speed (option)

Reliable DF results

Even in challenging environments

  • Higher immunity to reflections due to DF antennas with a very large number of antenna elements (VHF/UHF/SHF)
  • Stable bearings in VHF/UHF/SHF range even with a 50 % share of reflections

Precise direction finding and accurate location

Even for weak and short-duration signals

  • High DF sensitivity due to large number of antenna elements
  • Adjustable coherent signal integration in wideband DF and DF scan mode for enhanced DF sensitivity
  • GPS based synchronization of multiple R&S®DDF550 (time-synchronized DF scan mode)
  • Optional preclassifier detects LPI signals and summarizes individual results into a condensed result

Innovative DF antennas

  • Active/passive switchover with just a mouse click
  • Exceptionally high DF sensitivity
  • Integrated, extendible lightning protection
  • Easy replacement of DF antennas

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

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

Effective measurements

In line with ITU recommendations

  • R&S®DDF550 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

Multichannel signal processing

  • Multichannel signal detection and analysis in a networked system
  • Parallel multichannel output of more than 100 channels
  • Multichannel digital downconversion (DDC) signal extraction from the R&S®DDF550 realtime bandwidth with R&S®DDF550DDCE and R&S®CA120FFP
  • Automatic detection of fixed frequency and burst signals with R&S®DDF550-HRP and R&S®CA120DSC
  • Automatic detection of frequency agile short-time signals with R&S®DDF550-ST

Available models

Available models


Order number 4074.2002.08

Wideband direction finder with AC power supply (frequency range from 20 MHz to 6 GHz and 80 MHz real-time bandwidth)


Order number 4074.2002.18

Wideband direction finder with DC power supply (frequency range from 20 MHz to 6 GHz and 80 MHz real-time bandwidth)

Available options

Hardware options

Order number 4074.1006.02


HF frequency range extension

Extension of frequency range to 8 kHz for monitoring 


Order number 4074.1429.02


HF frequency range extension

Extension of frequency range to 300 kHz for direction finding


Order number 4079.8209.05


Internal GNSS module

Integrated GNSS module incl. GPS, Glonass, BeiDou for positioning and accurate timestamps


Order number 4074.1106.02


Signal processing board

Integrated signal processing board for parallel multichannel signal detection and analysis

Software options

Order number 4074.0900.02


Time-synchronous scanning

Time synchronisation for triangulation networks


Order number 4074.0800.02


ITU measurements

Signal measurements in line with ITU recommendations


Order number 4074.0951.02


DF error correction

Support of look-up table DF error correction; calibration service not included


Order number 4074.0700.02


DDC signal extraction

Parallel multichannel DDC output of up to 128 channels


Order number 4074.0745.02


High-resolution panorama spectrum

High-resolution spectrum calculation for detection of fixed frequency signals


Order number 4074.0722.02


Detection of short-time signals 

Automatic detection of short-time signals within the real-time bandwidth based on selected criteria

Direction finding antennas

Order number 4099.2006.05


HF DF antenna

300 kHz to 30 MHz; horizontal, vertical and circular polarization; portable; switchable antenna elements

Order number 4078.0004.02


Super-resolution HF DF antenna

300 kHz to 30 MHz; horizontal, vertical and circular polarization; stationary and transportable; switchable antenna elements

Order number 4200.7002.04


Centric mast HF DF antenna

1 MHz to 30 MHz; vertical polarization; shipborne; active antenna elements

Order number 4071.7003.12


Super-resolution VHF DF antenna

20 MHz to 450 MHz; vertical polarization; stationary; switchable antenna elements

Order number 4098.4005.02


Super-resolution UHF/SHF DF antenna

1.3 GHz to 6 GHz; vertical polarization; mobile and stationary; passive antenna elements

Order number 4053.6509.02


Mobile HF DF antenna

300 kHz to 30 MHz; vertical polarization; for installation on a vehicle roof or tripod

Order number 4071.6007.12


Super-resolution VHF/UHF DF antenna

20 MHz to 1.3 GHz; vertical polarization; mobile and stationary; switchable antenna elements

Order number 4069.4800.22


Dual-polarized VHF/UHF DF antenna

20 MHz to 1.3 GHz; vertical and horizontal polarization; mobile and stationary; switchable antenna elements

Order number 4068.3000.02


Compact LF UHF DF antenna

300 kHz to 3 GHz; vertical polarization; shipborne; active or passive antenna elements depending on frequency range

Order number 4071.4004.12


VHF/UHF Wideband DF antenna

20 MHz to 3 GHz; vertical polarization; mobile and stationary; switchable antenna elements

Order number 4111.8004.02


Super-resolution VHF/UHF/SHF wideband DF and monitoring antenna

20 MHz - 6 GHz, vertical and horizontal polarization, mobile and stationary, switchable antenna elements


Order number 4060.0454.02


Service kit

Simulation of the digital interface of DF antennas for error analysis

Request information

Do you have questions or need additional information? Simply fill out this form and we will get right back to you.

Marketing permission

Your request has been sent successfully. We will contact you shortly.
An error is occurred, please try it again later.
General and legal information

Manufacturer's recommended retail price (MSRP). The price shown does not include VAT. Prices and offers are only intended for entrepreneurs and not for private end consumers.

You may use the electronic signature via DocuSign to submit your information to enroll with the Rohde & Schwarz Customer Delegated Administration program. DocuSign processes the information provided according to their . The minimum system requirements for using the DocuSign system may change over time. The current system requirements are found

Terms & Conditions of the Prize Draw 10 years Rohde & Schwarz oscilloscopes

1. The prize draw “10 years Rohde & Schwarz oscilloscopes” (herein referred to as “Draw”) is organized by Rohde & Schwarz GmbH & Co. KG, Mühldorfstraße 15, 81671 Munich, Germany, Tel. +49 89 41 29 0 (herein referred to as “R&S).

2. All participators can register to the draw during January 01, 2020 to December 31, 2020 with their name, company name and business e-mail.

3. Participation is free of charge and not dependent on the purchase of goods or services.

4. The draw is only open to legal entities and only the legal entities are able to win the prizes. An individual person is not allowed to participate on its own name and its own account but as a representative of a legal entity filing the participation form in the name of and on behalf of the legal entity.

5. The prizes to win are 1 of 10 R&S®RTB2000 within the time frame January 1, 2020 to December 31, 2020:

Prize: 1x R&S®RTB2000 Digital Oscilloscope

6. The draw takes place at Rohde & Schwarz headquarters, Muehldorstrasse 15, 81671 Munich. The winner of the prizes will be informed by e-mail within 5 (5) working days.

7. The authorized representative of the legal entity shall inform Rohde & Schwarz about the acceptance of the price. In case of the denial of the acceptance, or no answer within two (2) weeks, a new winner will be drawn. If no winner can be determined within four (4) weeks, the draw ends and the prize forfeit.

8. R&S’ employees and members of their families and also person being familiar with the process of the draw and members of their families are excluded from filling the participation form.

9. No cash equivalent or exchange of prizes is allowed. Prizes are non-transferable. All taxes, levies, duties, fees and other charges levied in the participant´s country shall be borne by the participant.

10. Personal data will be processed only for the purpose of this prize draw and deleted four (4) weeks after the draw, if not agreed otherwise.

11. Any Participant who does not comply with these Terms & Conditions may be disqualified by R&S from this Competition. In such cases, prizes can also be withdrawn retrospectively. In case a prize is withdrawn retrospectively due to the non-compliance with these Terms & Conditions, it shall be returned by the respective participant at his cost to R&S’ address mentioned under Nr.1 and a new winner will be drawn.

12. The participants cannot claim the prizes of this draw and no legal recourse is permitted in this respect.

13. The draw and any contractual relationship arising therefrom between R&S and the respective participant shall be governed by and construed in accordance with the laws of Germany, without any recourse to the conflict of laws. The courts of Munich, Germany, shall have exclusive jurisdiction in case of any disputes arising directly or indirectly from the participation in this Competition.

* “fast delivery” inside 7 working days applies to the Rohde & Schwarz in-house procedures from order processing through to available ex-factory to ship.