傅立叶频谱分析仪 维修 销售 租赁
生产厂家: 惠普/安捷伦
HP3582A具有双通道输入，在单机使用时，可对正弦、随机、瞬态信号进行单通道幅值、相位谱分析，还可进行瞬态信号的捕捉分析，并具有双通道传递函数的幅值、相位谱及相干函数分析等功能。分析仪如果连接电脑，还可由电脑进行系统参数识别、绘制实频特性及虚频特性曲线、绘制Nyquist图(奈奎斯特图)，以及打印分析仪所显示的各种曲线。HP3582A是低频频段的频谱分析仪，适用于低频和超低频段进行信号频谱分析(幅值谱和相位谱)、测量系统传递函数(幅值传递函数和相位传递函数)、以及相干函数分析，还特别适合于机械振动和噪声的频谱分析。应用在机械工程领域里，主要用于：机械工况测试与故障诊断、机械结构动力分析、噪声分析与控制、机械设备性能评价等方面。在电子、电气及音响工程领域里：可用于信号分析、滤波器、音响元件和设备的传递函数分析以及电气干扰源的分析测量等方面。实际应用举例比如：测量加速度信号与力信号的相位差、半导体器件低频噪声测试、汽轮机松装叶片结构振动模态分析、相位噪声测试，等等。
| 频率 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 |
| 输入 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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