R&S®DDF205 Digital Direction Finder Accurate direction inding f in a compact unit

R&S®DDF205 Digital Direction Finder At a glance 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. Due to the use of wide-aperture DF antennas and a very large number of antenna elements, the correlative inter ferometer DF method offers a high degree of accuracy...

R&S®DDF205 Digital Direction Finder Benefits and key features 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 apability c 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)...

Extended applications Due to the extensive functionality of the R&S®EB500 monitoring receiver, the R&S®DDF205 offers more standard features than a conventional direction finder. Fast spectrum monitoring with scan speeds of up to 12 GHz/s The R&S®DDF205 can be equipped with the high-speed R&S®DDF205-PS panorama scan as an option. This enables fast scanning at speeds of up to 12 GHz/s to obtain a quick overview of the spectrum. A signal detected during the panorama scan can be transferred to DF mode by pressing a key. Display and demodulation of signals with up to 20 MHz bandwidth The R&S®DDF205...

Parallel monitoring and demodulation of one plus three signals within realtime bandwidth Equipped with the R&S®DDF205-DDC option, the R&S®DDF205 offers three parallel demodulation channels in addition to the demodulation path included in the base unit. The demodulation path included in the base unit has a maximum bandwidth of 20 MHz; the three additional paths provide a maximum of 1 MHz each. When the R&S®DDF205-DDC option is installed, users have four independent software receivers in a single instrument. The demodulated information from all four channels is processed as separate data streams...

Online signal analysis with live streaming over LAN interface The R&S®DDF205 provides a continuous I/Q baseband data stream for online analysis of a max. 1 MHz signal channel over the 1 Gbit LAN interface. The R&S®CA100 software uses this data stream to analyze and classify the signal on an external PC. It recognizes modulation modes and displays transmission quality in an eye diagram. Bitstream analysis allows users to extract the message content from the received signal. If the monitoring receiver is equipped with DDCs (R&S®DDF205-DDC option), the R&S®CA100 software can process up to three...

Fast and reliable radiolocation due to high DF accuracy Use of high-precision correlative interferometer DF method In the VHF/UHF/SHF range, the R&S®DDF205 uses the correlative interferometer DF method. In contrast to other direction finders using simple amplitude comparison methods, the R&S®DDF205 therefore offers significantly higher DF accuracy up to class A in line with ITU recommendations. This high DF accuracy relies on the precise measurement of the phase angles between the reference antenna element and the other elements. Measuring the phase difference between two signals normally requires...

Active/passive switchover with just a mouse click Up until now, users have had to decide what is more important to them: the higher sensitivity offered by active DF antennas or the higher immunity to strong signals provided by passive DF antennas. The R&S®ADD196/197/295 DF antenna for the first time makes it possible to bypass the active circuitry of the antenna elements. The user can switch the active elements to passive mode by a simple mouse click. This DF antenna thus offers the advantages of both methods. 1) Exceptionally high DF sensitivity The antenna elements of the R&S®ADD196, R&S®ADD197...

Effective measurements in line with ITU recommendations Modulation and bandwidth measurement results at a glance. Option for comprehensive, ITU- ompliant c measurement methods The R&S®DDF205-IM option enables ITU-compliant measurements of signal parameters for AM, FM and PM modulated signals. The modulation index, occupied bandwidth and phase deviation can be determined, for example. The minimum, maximum and average values over a user- defined measurement period are displayed. The R&S®DDF205-IM option covers the following ITU recommendations: ❙❙ ITU-R SM.377 (frequency and frequency offset measurements) 1)...

Fast, effective interference detection Together with the new R&S®DDF205-FE option and the R&S®ADD075 DF antenna, the R&S®DDF205 delivers accurate DF results up to 6 GHz. Until now, this has been possible only up to 3 GHz. For the first time, bearings can now be taken on transmitters up to 6 GHz, for example in the frequency ranges of the following services: ❙❙ WLAN ❙❙ WiMAX™ ❙❙ Microwave links Locating target transmitters previously required the use of rotatable directional antennas, which have disadvantages regarding manageability and measurement speed. The R&S®DDF205 immediately displays the...

All details visible in DF mode In order to get stable and accurate DF results, a sufficiently wide DF bandwidth is required, i.e. the DF bandwidth should be similar to the signal bandwidth. Typically, this results in a coarse spectrum resolution. In many applications, a much finer channel resolution in the IF spectrum is required in order to see details in the spectrum that are not visible otherwise. Now the R&S®DDF205 offers both in parallel: an IF spectrum with fine resolution for spectrum display and a DF spectrum with coarse resolution for direction finding (see screenshot). Both resolutions...