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DDF200M Digital Direction Finder by Rohde & Schwarz

Companies & Organizations:

Germany

Rohde & Schwarz GmbH & Co KG
Muehldorfstrasse 15
81671 Muenchen


The R&S®DDF200M digital direction finder represents the latest generation of traffic control direction finders. Radio direction finding for maritime traffic control is performed simultaneously on multiple frequency channels using only one direction finder.

 

Key Facts

 

Parallel direction finding on up to 32 maritime channels with the same high DF accuracy and sensitivity on all channels

Quasi-simultaneous direction finding on additional channels outside the maritime frequency range, e.g. distress channels

Seamless coverage of a wide frequency range from 118 MHz to 250 MHz (with R&S®ADD090)

Adaptive interference cancellation (option) in instances where VHF radiocommunications antennas are installed on the same mast as the DF antenna

Output of results to vessel traffic management systems via a serial interface (option) or TCP/IP interface

Serial interface compatible with R&S®DDF100M (option)

 

Features & Benefits

 

One direction finder for all frequency channels

- Parallel direction finding on up to 32 maritime channels with the same high DF performance on all channels

- Quasi-simultaneous direction finding on additional channels outside the maritime frequency range, e.g. distress channels

 

High DF accuracy, sensitivity and immunity to reflections

- Correlative interferometer DF method

- Multi-element wide aperture DF antenna

 

Adaptive interference cancellation (option)

- Suppression of interference signal caused by strong adjacent transmitters enable direction finding

- Installation of DF antenna and maritime radiocommunications antennas on the same mast

 

Simple networking and control

- Networking of direction finder, data server and display units via LAN

- Output of DF results to vessel traffic management systems (VTS) via TCP/IP or optional serial interface

- Serial interface compatible with R&S®DDF100M (option)

- Powerful R&S®DDF20M-CTL graphical user interface and control software included

 

Comprehensive selftest capabilities

-Built-in test and automatic alerts in event of error(s)

 

Integrated DF antenna lightning protection

- No impairment of DF accuracy

- DF accuracy specified in data sheets attained even with lightning rod

- No time-consuming calibration after DF antenna installation

 

Specifications

 

Specifications in Brief

Frequency range     

with R&S®ADD090                                                118 MHz to 250 MHz

System DF accuracy1)        

with R&S®ADD090, in reflection-free

environment, including lightning protection,

DF error correction not required                             ≤ 1° RMS, 0.5° RMS (typ.)

DF method                                                              correlative interferometer

Channel resolution  selectable                               200 Hz to 2 MHz (includes 12.5 kHz and 25 kHz)

DF sensitivity           

with R&S®ADD090, field strength

required for 2° RMS, 15 kHz DF

bandwidth, 1 s integration time                               5 μV/m

Number of frequency channels in parallel         

in the maritime frequency range

of 156 MHz to 162 MHz                                          up to 32 channels

Maximum number of interferers 

with interference cancellation                                  6

Level of suppression of the interferers   

with interference cancellation                                  40 dB (typ.)

Frequency range of the interferers         

with interference cancellation                                 150 MHz to 174 MHz

Interfaces     

all DF modes                                                           Ethernet

optional for DF0, DF1, DF2 and DF3 modes          RS-232

Dimensions  

DF unit                                                                     ½ 19" × 3 HU

R&S®ADD090                                                         approx. 2.07 m × 2 m

(Ø × H, with lightning protection)                             (6.79 ft × 6.56 ft)

Weight           R&S®ADD090                                   approx. 40 kg (88.18 lb)

 

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

Defense Products & Services: DDF200M Digital Direction Finder by Rohde & Schwarz
Companies & Organizations: 
Defense Products & Services Sectors: Direction finding systems, ground-based
Country: Germany
Description: DDF200M Digital Direction Finder
Source of Information: Rohde & Schwarz GmbH & Co KG