IZT R5000/R4000寬帶無線電接收機一套基于的專業無線電接收理念開發的接收機系統,該系統具有高性能射頻前端,保證系統在工作在上百兆瞬時帶寬的條件下,還具有和傳統窄帶接收機一樣優秀的線性度和動態范圍。
同時接收機前端系統還配有可自由配置的一些低通和高通濾波器,通過自由的組合這些濾波器,可以定義出各種陷波曲線,以滿足某些特殊場景下的測試需求。如下圖:
通過組合不同的濾波器形成前端不同的幅頻特性
為了能夠*適應現代電子戰環境下的通信情報和電子情報系統集成,寬帶衛星偵察,以及連續的寬帶無線電信號記錄等各種應用。IZT R5000/R4000寬帶子信道化數字接收機平臺具有大于100MHz的瞬時實時帶寬處理能力,工作頻率范圍覆蓋9KHz-18GHz。更重要的是平臺的數字信號處理架構允許用戶在120MHz的瞬時實時帶寬內,獨立的定義數十個在頻域和時域獨立的子信道,每個子信道可以單獨輸出對應的I/Q, FFT和頻譜的數據,并且根據用戶定義的時間軸,在對應的時間段內將這些數據發送到不同的用戶端做不同的處理分析,包括但不限于監測分析,解調,測向等。如下圖:
可以在頻域和時域定義獨立的子信道
接收機控制界面和多子信道頻譜數據輸出顯示
另外數字接收機平臺采用的的智能數據緩存和存儲技術,保證從空間接收到的每一個bit的數據都能夠無損的傳輸到客戶端做進一步的數據分析。
主要技術指標:
R4000 主機系統 | ||
ADC模塊組指標 | Sampling rate | 320 MSPS, 16bits |
SFDR, 9 kHz to 140 MHz | 90 dB, typical (referenced to full scale of ADC) | |
SFDR, 120 MHz to 18 GHz | 75 dB, typical (referenced to full scale of ADC) | |
瞬時帶寬 | 120 MHz | |
中頻獨立子信道 | Number of channels | up to 127, independent |
Channel bandwidth | 100 Hz to 120 MHz | |
Data buffering | up to 4 seconds, with respect to spectrum data | |
頻譜數據 | Number of channels | two independent spectrum channels |
Bandwidth | 120 MHz to 7.5MHz | |
Frequency resolution | 39 kHz to 305Hz | |
FFT width | 4096,32768 | |
FFT window | Hamming, Hanning, Blackman-Harris, Polyphase m=3, | |
user-configurable coefficients (up to 3x4096) | ||
Averaging | 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 | |
Detector | Max, Min, RMS | |
物理接口 | RF input | N, female, 50 Ω (one common RF input or up to 4 individual |
RF inputs for the frequency range) | ||
IF input | N, female, 50 Ω | |
External reference input | 10 MHz, BNC, female, 50 Ω | |
Trigger pulse input | SMA, female, CMOS 3.3 Volt (5 Volt tolerant input) | |
Trigger pulse output | SMA, female, CMOS 3.3 Volt | |
Synchronisation input 1PPS | BNC, female, CMOS 3.3 Volt (5 Volt tolerant input) | |
External synchronization | up to 10x SMA, female, 50 Ω | |
Service interface | RS232, D-SUB 9, male | |
LAN | 2x1 Gigabit LAN, approx. 1.8 Gbps throughput | |
LAN (Option R4000-10G) | 10 Gigabit LAN | |
Additional Interfaces | GPIB, USB 2.0, VGA, RS232 |
R4000 主機系統 中頻接口指標 | ||||||||
中頻輸入范圍 | Baseband input | 2 MHz to 140 MHz | ||||||
輸入信號功率 | +15 dBm | |||||||
調諧分辨率 | 1 Hz | |||||||
調諧精度 | < 0.2 Hz | |||||||
VSWR | < 2.1 | |||||||
內部10MHz精度 | < 1 x 10-7 | |||||||
相位噪聲 | -130 dBc/Hz typical @ 1 kHz offset | |||||||
-140 dBc/Hz typical @ 10 kHz offset | ||||||||
全景掃描速度 | Frequency scan within 120 MHz bandwidth | > 4000 GHz /sec | ||||||
3階互調截至點 | +40 dBm, typical | |||||||
噪聲系數 | 15 dB | |||||||
R4000-RF3: Frequency Extension 9 kHz to 3 GHz | ||||||||
頻率范圍 | 9 kHz to 3 GHz | |||||||
下變頻 | 9 kHz to 140 MHz | Direct sampling | ||||||
140 (20) MHz to 3 GHz | Double conversion superheterodyne | |||||||
輸入功率 | +15 dBm | |||||||
調諧調諧分辨率 | 1 Hz | |||||||
調諧精度 | < 0.2 Hz | |||||||
VSWR | < 2.1 | |||||||
內部10MHz精度 | < 1 x 10-7 | |||||||
相位噪聲 | 9 kHz to 140 MHz | -130 dBc/Hz typical @ 1 kHz offset -140 dBc/Hz typical @ 10 kHz offset | ||||||
140 MHz to 3 GHz | -120 dBc/Hz typical @ 10 kHz offset | |||||||
全景掃描速度 | Frequency scan, linear | > 40 GHz /sec | ||||||
Frequency scan within 120 MHz bandwidth | > 4000 GHz /sec | |||||||
三階截至點 | 9 kHz to 140 MHz (Normal mode) | +40 dBm, typical | ||||||
140 MHz to 3 GHz (Low distortion mode) | +24 dBm, typical | |||||||
140 MHz to 3 GHz (Normal mode) | +13 dBm, typical | |||||||
中頻抑制 | > 120 dB, typical | |||||||
鏡頻抑制 | > 110 dB, typical | |||||||
預選濾波 | 9 kHz to 140 MHz | More than 100 highpass/lowpass filter combinations | ||||||
140 MHz to 3 GHz | 11-Band suboctave filter | |||||||
R4000-RF18: 3 GHz to 18 GHzs射頻前端指標 | ||
頻率范圍 | 3 GHz to 18 GHz | |
阻抗 | 50 Ohm | |
輸入功率 | +10 dBm | |
調諧調諧分辨率 | 1 Hz | |
調諧精度 | < 0.2 Hz | |
VSWR | < 2.1 | |
相位噪聲 | -114 dBc/Hz typical @ 10 kHz offset | |
全景掃描速度 | Frequency scan, linear | > 12 GHz /sec |
Frequency scan within 120 MHz bandwidth | > 4000 GHz /sec | |
三階截至點 | Low distortion mode | +25 dBm, typical |
中頻抑制 | > 120 dB, typical | |
鏡頻抑制 | > 110 dB, typical | |
預選濾波器 | 跟蹤帶通濾波器 |