型号：DDF255 名称：DDF255 数字测向机
型 号：DDF255名 称：DDF255 数字测向机产品简介：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 fu
详细信息：
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)
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.
