傅立葉頻譜分析儀 維修 銷售 租賃
生產(chǎn)廠家: 惠普/安捷倫
HP3582A具有雙通道輸入，在單機使用時，可對正弦、隨機、瞬態(tài)信號進行單通道幅值、相位譜分析，還可進行瞬態(tài)信號的捕捉分析，并具有雙通道傳遞函數(shù)的幅值、相位譜及相干函數(shù)分析等功能。分析儀如果連接電腦，還可由電腦進行系統(tǒng)參數(shù)識別、繪制實頻特性及虛頻特性曲線、繪制Nyquist圖(奈奎斯特圖)，以及打印分析儀所顯示的各種曲線。HP3582A是低頻頻段的頻譜分析儀，適用于低頻和超低頻段進行信號頻譜分析(幅值譜和相位譜)、測量系統(tǒng)傳遞函數(shù)(幅值傳遞函數(shù)和相位傳遞函數(shù))、以及相干函數(shù)分析，還特別適合于機械振動和噪聲的頻譜分析。應(yīng)用在機械工程領(lǐng)域里，主要用于：機械工況測試與故障診斷、機械結(jié)構(gòu)動力分析、噪聲分析與控制、機械設(shè)備性能評價等方面。在電子、電氣及音響工程領(lǐng)域里：可用于信號分析、濾波器、音響元件和設(shè)備的傳遞函數(shù)分析以及電氣干擾源的分析測量等方面。實際應(yīng)用舉例比如：測量加速度信號與力信號的相位差、半導(dǎo)體器件低頻噪聲測試、汽輪機松裝葉片結(jié)構(gòu)振動模態(tài)分析、相位噪聲測試，等等。
| 頻率 FREQUENCY | |
| Range | 0.02 Hz to 25.5 kHz |
| Spans | 1 Hz to 25 kHz in a 1-2.5-5-10 sequence |
| Accuracy | ± 0.003% of display center frequency |
| Resolution | 0.4% of the frequency span for single channel or 0.8% of the frequency span for dual channels |
| 幅度 AMPLITUDE | |
| Display Modes | |
| Log | 10 dB/division or 2 dB/division |
| Linear | constant voltage/division |
| Measurement Range | |
| Log | +30 dBV to -120 dBV noise floor |
| Linear | +30 V to 1µV noise floor |
| Dynamic Range | 70 dB |
| DC response | adjustable to >40 dB below maximum input level |
| Accuracy | |
| Accuracy at the Passband Center | ± 0.5 dB |
| Flat top filter | +0, -0.1 dB |
| Hanning filter | +0, -1.5 dB |
| Uniform filter | +0, -4.0 dB |
| Note: Overall accuracy is the sum of the accuracy at the passband center plus the selected filter accuracy. | |
| Resolution | |
| Log | 0.1 dB |
| Linear | 3 digits |
| 相位 PHASE | |
| Display Range | +200° to -200° |
| Accuracy | ± 10° |
| Resolution | 1° |
| TRANSFER FUNCTION | |
| Measurement Range | |
| Log | +160 dB full scale to -80 dB full scale |
| Linear | 4 X 108 full scale to 4 X 10-8 full scale |
| Phase display range | +200 degrees to -200 degrees |
| 輸入 INPUT | |
| Impedance | 106Ω ± 5% shunted by <60 pF from input high to low (for less than 75% relative humidity) |
| Isolation | input low may be floated up to 30V |
| Coupling | switch selection of ac or dc coupling. The low frequency 3 dB roll off is <1 Hz. |
| Common Mode Rejection | >58 dB |
The HP3582A offers outstanding value in a dual-channel, real-time spectrum analyzer that solves bench and systems measurement problems in the frequency range of 0.02 Hz to 25.599 kHz. Sophisticated LSI digital filtering combined with microcomputer execution of the Fast Fourier Transform (FFT) provides exceptional measurement capability and performance.
Exceptional Frequency Resolution and Coverage
Unlike conventional dynamic signal analysis which extends from dc to some maximum frequency, the HP3582A can "zoom in" to analyze any selected band of frequencies with dramatically improved resolution. The start or center frequency of the 5 Hz to 25 kHz band analysis spans can be adjusted in 1 Hz increments to cover the entire frequency range of the instrument. This provides resolution, representing as much as a 5000 to 1 improvement over conventional "baseband" analysis. With frequency ranges from 25 kHz down to 1 Hz full scale, the HP3582A is extremely well suited to audio and sub-audio measurements.
Real Time Measurement Speed and Wide Dynamic Range
In high volume testing or in applications requiring substantial on-line tuning, long measurement times are both expensive and inconvenient. Since the HP3582A uses an advanced microcomputer to execute the FFT, it can perform equivalent measurements as much as one to two orders of magnitude faster than a swept analyzer. For a spectrum analyzer to provide useful information about low level components in the presence of a large signal, it must offer wide dynamic range. The HP3582A dynamic range is specified as 70 dB-more than adequate for most applications.
Phase Spectrum Measurement
Most spectrum analyzers can measure only the amplitude spectrum of a signal, yet complete characterization in the frequency domain also requires phase information. The advanced digital signal processing techniques incorporated in the HP3582A provides direct measurement of phase spectra.
Transient Capture and Analysis
By using digital processing techniques, the HP3582A can capture and analyze transients as short as a few milliseconds. This means that spectrum analysis and transfer function analysis are no longer limited to stable, time invariant signals.
Transfer Function Measurements
The HP3582A directly measures the complete transfer function, both magnitude and phase with dual channels analysis of linear and non-linear networks, respectively. In addition, the sources are band-limited to concentrate all stimulus energy in the analysis range.
The HP3582A coherence function indicates the probability for causality beetween the two input signals at each frequency. If the coherence between input and measured output is low, the output signal contains a large amount of energy that is not related to the input. Thus, the transfer function measured at that frequency is not reliable.
Digital Averaging Capability
The RMS averaging mode takes the power average of 4 to 256 successive spectra in order to reduce the uncertainty of the estimate of random spectral components.
When a synchronizing trigger signal is available, the TIME average can enhance the signal-to-noise ratio by as much as 24 dB. Since it involves the averaging of successive time records before transformation, it is also significantly faster than other types of averaging.
Powerful HP-IB Capability
All major front panel controls are fully programmable via the HP-IB. From the HP-IB it is a simple matter to command the HP3582A to output results, as well. Not only can the various control settings be retrieved, but numeric marker data can be extracted. More importantly, the full display can be read in ASCII format along with complete annotation.
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