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SR785-動(dòng)態(tài)信號(hào)分析儀
  • SR785-動(dòng)態(tài)信號(hào)分析儀

貨物所在地:北京北京市

地: 美國

更新時(shí)間:2025-03-11 21:00:01

瀏覽次數(shù):6428

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美國斯坦福公司SR785——102KHz雙通道FFT動(dòng)態(tài)信號(hào)分析儀是同類產(chǎn)品中*,精度、穩(wěn)定性的一臺(tái)頻域信號(hào)分析設(shè)備。其被廣泛應(yīng)用在電子產(chǎn)品研發(fā)、生產(chǎn)、檢驗(yàn)等方面,是對電信號(hào)進(jìn)行頻域、失真的等進(jìn)行測量的*手段。
動(dòng)態(tài)信號(hào)分析儀

102.4KHz的帶寬
90dB的動(dòng)態(tài)范圍
在正弦掃描下145dB動(dòng)態(tài)范圍
命令跟蹤
實(shí)時(shí)的倍頻分析
多達(dá)32M字節(jié)的儲(chǔ)存空間
20-/20-零曲線擬合
GPIB和RS-232接口

        SR785 動(dòng)態(tài)信號(hào)分析儀是一款精度高、功能強(qiáng)大的信號(hào)分析儀。它是目前性能zui強(qiáng)的100KHz動(dòng)態(tài)信號(hào)分析儀,而且價(jià)錢不到其它可與之匹敵的分析儀一半。此設(shè)備融合了新的固件和硬件使之成為分析電子分析和機(jī)械系統(tǒng)的理想工具。SR785的特點(diǎn)和它的參數(shù)使它能夠完成多方面的測量,如伺服系統(tǒng)、控制系統(tǒng)、聲學(xué)、振動(dòng)測試、模式分析和機(jī)械診斷等等。
?        標(biāo)準(zhǔn)的測量包括FFT、指令跟蹤、倍頻、正弦掃頻、相關(guān)相關(guān)時(shí)間柱狀圖。在應(yīng)用中,SR785具有幾個(gè)儀器的功能,如:光譜分析、振動(dòng)分析、倍頻分析和示波鏡等。 
        由于它*的測量結(jié)構(gòu),SR785 具備了典型的雙通道分析功能,它能測量交叉譜、頻率響應(yīng)、相干性等等。當(dāng)然你也可以只選一路通道, 作為單通道分析儀使用,它的每路輸入通道都有自己的范圍、中心波長、分辨率和平均值,是一個(gè)真正雙通道100KHz的動(dòng)態(tài)信號(hào)分析儀。

SR785動(dòng)態(tài)信號(hào)分析儀的特點(diǎn):
1、采用數(shù)字方法(DSP技術(shù))直接由模擬/數(shù)字轉(zhuǎn)換器對信號(hào)取樣獲得頻率。
2、具有良好的儀器線性度和高分辨率;DC到100KHz的帶寬;90dB動(dòng)態(tài)范圍。
3、*的低失真信號(hào)源,具有跟蹤功能,可用于旋轉(zhuǎn)命令測試。
4、1/1,1/3,1/12倍頻頻譜的實(shí)時(shí)分析功能。
5、雙通道分析功能,可測量交叉譜、頻率響應(yīng)和相干性等;也可作為單通道使用,并且每個(gè)通道都有各自的頻率范圍、分辨率,是真正100KHz的實(shí)時(shí)帶寬的諧波、頻帶、邊頻帶的分析儀。
6、CRT顯示,各種程序控制都可在前面板操作。RS232和GPIB接口可隨時(shí)與計(jì)算機(jī)相連。

SR785動(dòng)態(tài)信號(hào)分析儀可以進(jìn)行這個(gè)動(dòng)態(tài)分析,具體如下圖:SR785可以實(shí)現(xiàn)平均分析、命令跟蹤、倍頻分析、正弦掃描分析、時(shí)間柱狀圖、捕獲分析、瀑布圖、虛線擬合。



SR785參數(shù):

參數(shù)適用于30分鐘預(yù)熱之后,自動(dòng)矯正偏差2小時(shí)內(nèi)。測量時(shí),除了必要的聲明,使用400線的分辨率和反鋸齒濾波器。
測量類型
類型                                    FFT, Correlation, Time Histogram, Swept-Sine, Order Tracking
頻率
范圍                                   102.4 kHz or 100 kHz (both displays have the same range)
FFT 范圍                           195.3 mHz to 102.4 kHz or 191 mHz to 100 kHz. The two displays can have  
                                             different spans and start frequencies.
FFT 分辨率                       100, 200, 400 or 800 lines
真實(shí)帶寬                           102.4 kHz (highest FFT span with continuous data acquisition and averaging)
性                                25 ppm from 20 °C to 40 °C
動(dòng)態(tài)范圍
動(dòng)態(tài)范圍                            90 dB typical, 80 dB guaranteed(FFT and Octave).
                                           145 dB typical (Swept-Sine).
                                            Includes spurs, harmonics, intermodulation distortion, and alias products. 
                                             Excludes alias responses at extremes of span.
諧波失真                            < -80 dB (single tone in band)
Intermod. distortion         < -80 dB (two tones in band, each less than -6.02 dBfs)
失真                                    < -80 dBfs
Alias responses              < -80 dBfs (single tone outside of span, <0 dBfs, less than 1 MHz)
滿量程FFT                         -100 dBfs typical (input grounded, noise floor > -30 dBV, Hanning window, 64 
                                             rms averages)
Residual DC response          < -30 dBfs (FFT with Auto-Cal on)
振幅精度
單通道                                ±0.2 dB (excluding window effects)
交叉通道                            ±0.05 dB, DC to 102.4 kHz(frequency response measurement, both inputs on 
                                              the same range, rms averaged)
相位精度
單通道                                ±3.0 deg. relative to external TTL trigger (-50 dBfs to 0 dBfs, freq. <10.24 kHz, 
                                            center of frequency bin, DC coupled). For Blackman-Harris, Hanning, Flat-Top 
                                            and Kaiser windows, phase is relative to a cosine wave at center of time record. 
                                            For Uniform, Force and Exponential windows, phase is relative to a cosine 
                                            wave at beginning of the time record.
交叉通道                            ±0.5 deg. (DC to 51.2 kHz) ±1.0 deg. (DC to 102.4 kHz) (frequency response 
                                             meas., both inputs on same range, vector avg.)
信號(hào)輸入
輸入通道個(gè)數(shù)                     2
滿量程輸入范圍                 -50 dBV (3.16 mVp) to +34 dBV (50 Vp) in 2 dB steps
zui大輸入電平                     57 Vp
輸入配置                             Single-ended (A), differential (A-B)
輸入阻抗                             1 MΩ + 50 pF
機(jī)箱屏蔽                              Floating mode: 1 MΩ + 0.01 μF
                                              Grounded mode: 50 Ω
                                              Shields grounded in (A-B) mode
zui大保護(hù)電壓                      4 Vp
交流耦合                              0.16 Hz cutoff frequency
CMRR                                  90 dB at 1 kHz (input range <0 dBV)
                                              80 dB at 1 kHz (input range <10 dBV)
                                              50 dB at 1 kHz (input range ≥10 dBV)
ICP signal conditioning        電流源: 4.8 mA
                                                  開路電壓: +26 V
A-weight filter                      Type 0 tolerance, ANSI standard S1.4-1983 (10 Hz to 25.6 kHz)
Crosstalk                             < -145 dB below signal (input to input and source to inputs, 50 Ω receiving 
                                                input source impedance)
輸入噪聲                              < 10 nVrms/√Hz above 200 Hz(< -160 dBVrms/√Hz)
觸發(fā)輸入
模式                                      Free Run, Internal, External, or External TTL
內(nèi)部                                      Level adjustable to ±100 % of input scale. (Positive or negative slope) Min. 
                                              trigger level: 5 % of input range
外部                                      Level adjustable to ±5 V in 40 mV steps. (Positive or negative slope) Input 
                                              impedance: 1 MΩ
                                              Max. input: ±5 V    Min. trigger level: 100 mV
外部TTL電平                       Requires TTL level to trigger(low <0.7 V, high >3.0 V)
后置觸發(fā)器                          Measurement record is delayed up to 100,000 samples after the trigger.
前置觸發(fā)器                          Measurement record starts up to 8000 samples prior to the trigger.
轉(zhuǎn)速計(jì)輸入
脈沖分辨?zhèn)€數(shù)                       1 to 2048
RPM 精度                             ±50 ppm (typ.)
Tach level range                  ±25 V, ±5 V, TTL
Tach level resolution          20 mV @ ±25 V, 4 mV @ ±5 V
Max. tach input level            ±40 Vp
Min. tach pulse width          100 ns
Max. tach pulse rate            750 kHz
瞬時(shí)采樣
模式                                        Continuous data recording
zui大比率                                262,144 samples/s for both inputs
zui大采樣率                            2 Msamples (single input)
長度                                        8 Msamples with optional memory
倍頻分析
標(biāo)準(zhǔn)                                        Conforms to ANSI std. S1.11-1986 Order 3 Type 1-D and IEC 225-1966
頻率范圍(Band centers)        單通道
                                                   1/1 Octave 0.125 Hz to 32 kHz
                                                   1/3 Octave 0.100 Hz to 40 kHz
                                                   1/12 Octave 0.091 Hz to 12.3 kHz
                                                   雙通道
                                                  1/1 Octave 0.125 Hz to 16 kHz
                                                  1/3 Octave 0.100 Hz to 20 kHz
                                                  1/12 Octave 0.091 Hz to 6.17 kHz
度                                      <0.2 dB (1 second stable average, single tone at band center)
動(dòng)態(tài)范圍                                  80 dB (1/3 Octave, 2 second stable average) per ANSI S1.11-1986
音頻                                          Impulse, Peak, Fast, Slow and Leq per ANSI S1.4-1983 Type 0 and IEC 651-
                                                  1979 Type 0
命令跟蹤
Delta命令                                0.0075 to 1
分辨率                                      up to 400 lines
振幅度                             ±1 dB (typ.)
顯示                                         Order map (mag. and phase), order track (mag. and phase), orbit
曲線擬合
類型                                         20-pole/20-zero curve fit (non-iterative rational fraction)
命令選擇                                 Auto or manual
輸出格式                                 Pole-zero, polynomial, pole-residue
光源輸出
振幅范圍                                 0.1 mVp to 5 Vp
振幅分辨率                             0.1 mVp
DC偏移                                   <10.0 mV (typ.)
偏移調(diào)整                                 ±5 VDC (sine, swept-sine, two-tone)
輸出阻抗                                 <5 Ω, ±100 mA peak output current
正弦信號(hào)源
振幅精度                                ±1 % of setting, 0 Hz to 102.4 kHz
                                                0.1 Vp to 5 Vp into Hi-Z load
諧波和分諧波                        0.1 Vp to 5 Vp
虛假信號(hào)                                < -80 dBc (fundamental <30 kHz)
                                                < -75 dBc (fundamental <102 kHz)
雙色源
振幅精度                                ±1 % of setting, 0 Hz to 102.4 kHz,
                                                 0.1 Vp to 5 Vp into Hi-Z load
諧波和分諧波                         < -80 dBc, 0.1 Vp to 2.5 Vp
白噪聲源
時(shí)間記錄                                 Continuous or burst
帶寬                                         DC to 102.4 kHz or limited to span
平滑度                                     <0.25 dBpp (typ.), 5000 rms averages (<1.0 dBpp (max.))
粉紅噪聲源
帶寬                                         DC to 102.4 kHz
平滑度                                     <2.0 dBpp, 20 Hz to 20 kHz (measured using averaged 1/3 oct. analysis)
啁啾源
時(shí)間記錄                                Continuous or Burst
輸出                                        Sine sweep across the FFT span
平滑度                                   ±0.25 dB (1.0 Vp)
正弦掃描源
自動(dòng)功能                               Source level, input range and
動(dòng)態(tài)范圍                               145 dB
隨機(jī)源
振幅范圍                               ±5 V
記錄長度                               2 Msamples (playback from arbitrary waveform memory or capture buffer), 
                                                variable output sample rate

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