r&s®ddf255 digital direction finder | 概览 -九游官网下载

accurate direction finding with measurement and analysis capabilities in a single unit

  • 概览

key facts

  • tried and tested df method used by 24 regulatory authorities worldwide
  • high-precision df method at an excellent price/performance ratio (patented method)

brief description

the r&s®ddf255 combines the extremely powerful r&s®esmd wideband monitoring receiver with the accurate correlative interferometer df method. this combination yields a high-precision wideband direction finder featuring extensive measurement and analysis functions.

features

  • extended applications
  • effective measurements in line with itu recommendations
  • wideband direction finding with realtime bandwidth of up to 20 mhz

specifications

base unit frequency range
receive mode

 

 20 mhz to 3.6 ghz

 
df mode

 

 20 mhz to 3 ghz

 

key facts

  • tried and tested df method 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)
  • direction finding of signals in the frequency range up to 8.2 ghz
  • detection of extremely short emissions at unknown frequencies due to high-speed panorama scan (optional)
  • measurement methods in line with itu recommendations (optional)
  • realtime event capture (rec) for i/q recordings and realtime replay (optional)

brief description

the r&s®ddf255 combines the extremely powerful r&s®esmd wideband monitoring receiver with the accurate correlative interferometer df method. this combination yields a high-precision wideband direction finder featuring extensive measurement and analysis functions. with its high integration density and optional dc power supply, the r&s®ddf255 is also ideal for mobile applications.

features & benefits

  • extended applications
    • fast direction finding and spectrum monitoring, analysis and demodulation of wideband signals
    • parallel monitoring and demodulation of one plus four signals within realtime bandwidth
    • time domain analysis up to 20 mhz bandwidth with r&s®ddf255-zs zero span option
  • effective measurements in line with itu recommendations

    the r&s®ddf255 fulfills all itu recommendations for monitoring direction finders and receivers.

    • option for itu-compliant measurements on signal parameters for am, fm and pm-modulated signals (e.g. modulation index, occupied bandwidth and phase deviation)
    • offline measurements on digitally modulated signals using the r&s®ca100is software and suitable options (in line with itu recommendation sm1600)
  • wideband direction finding with realtime bandwidth of up to 20 mhz
    • parallel determination of bearings of all transmitters within the realtime bandwidth
  • fast and reliable radiolocation due to high df accuracy
    • high-precision correlative interferometer df method using multi-element df antennas (vhf/uhf/shf)
  • high-resolution if spectrum
    • all spectrum details visible in df mode
  • direction finding up to 8.2 ghz
    • fast, effective interference detection
  • recording and replaying of up to 80 mhz wide i/q data
    • never miss an event: activation of recordings with flexible realtime event capture (rec)
    • signals as received from an antenna: all receiver functions available when replaying i/q data
    • detailed display: replay of i/q data with increased time resolution
    • replay in realtime: realtime replay of recorded data in the receiver
  • map display with gnss position
    • map display of current direction finder location
    • selectable display of recorded results (e.g. spectra) relative to a position
    • map material based on openstreetmap (osm)
    • for receivers with front panel operation or for external r&s®ddf255 gui software
  • hardware-accelerated 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®ddf255 realtime bandwidth with r&s®ddf255-ddce and r&s®ca120ffp
    • automatic detection of fi xed frequency and burst signals with r&s®ddf255-hrp and r&s®ca120dsc
    • automatic detection of frequency agile short-time signals with r&s®ddf255-st
  • tdoa ready with high-accuracy timestamps and gnss synchronization of frequency and time
    • synchronization of receiver frequency and time using the r&s®ddf255igt2 internal gnss module
    • high-accuracy timestamps in i/q baseband data stream for use in tdoa systems

specifications

frequency range, receive mode
  base unit 20 mhz to 3.6 ghz
  with r&s®ddf255-shf option 20 mhz to 26.5 ghz
  with r&s®ddf255-hf option 8 khz to 3.6 ghz
frequency range, df mode
  base unit 20 mhz to 3 ghz
  with r&s®ddf255-shf option 20 mhz to 8.2 ghz1)
  with r&s®ddf255-hf option 300 khz to 3 ghz
df mode
df method vhf/uhf/shf correlative interferometer
  hf watson-watt
instrument df accuracy   0.5º rms
system df accuracy2) depends on df antenna (i.e. r&s®add119, r&s®add196 and 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°
  20 mhz to 80 mhz typ. 1° rms
  80 mhz to 1.3 ghz typ. 0.5° rms
  1.3 ghz to 8.2 ghz typ. 1° rms
system df sensitivity depends on df antenna (i.e. r&s®add119, r&s®add196 and 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
  6 ghz to 8.2 ghz typ. 3 μv/m to 14 μv/m
realtime bandwidth for wideband direction finding   up to 20 mhz
minimum signal duration for a single burst signal, in line with report itu-r sm.2125
  vhf/uhf/shf 1 ms
  hf 2 ms
receive mode
realtime bandwidth for analysis/demodulatio base unit  up to 20 mhz
  with r&s®ddf255-adc2 and r&s®ddf255-wb
options		 additionally 40 mhz and 80 mhz
scan speed with r&s®ddf255-ps option up to 270 ghz/s
(in-band)
  with r&s®ddf255-adc2, r&s®ddf255-wb and
r&s®ddf255-ps options		 up to 850 ghz/s
(in-band) 
minimum signal duration vhf/uhf/shf 1 ms
  hf 2 ms

1) depends on df antenna.
2) 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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