详细说明：

双通道动态信号分析仪 HP 35665A

  选件照片

厂家: 美国惠普

是一款具有内置信号源的通用 FFT 分析仪，适用于常见的频谱和网络分析，以及倍频程、阶次与关联分析。内置信号源具有可选的分析特性，可以优化分析仪的性能，以便对噪声、振动和声学问题进行分析和故障诊断，评测并解决旋转机械问题，以及表征控制系统参数。

性能指标pdf

频率

• 范围
  单通道模式(CH. 1): 102.4 kHz
  双通道模式(Ch 1 & 2): 51.2 kHz
• 分辨力
  100, 200, 400 or 800 lines resolution
  Frequency resolution = frequency span/number of lines resolution
• 最小频率分辨率
  单通道模式: 244 uHz
  双通道模式: 122 uHz
• SPANS
  单通道模式: 102.4 kHz to 0.19531 Hz
  双通道模式: 51.2 kHz to 0.097656 Hz
• 精度 ±30 ppm
  Real Time Bandwidth
  Fast Average On: >=12.8 kHz
• 测量率
  401 point FFT display, fast average on
  One Channel mode: >=33 averages/second (typical)
  Two channel mode: >=15 averages/second (typical)
• 显示刷新率: >=8 updates/second (typical)
  401 point FFT display, fast average off

幅度 / 相位

• 输入范围 (full scale): +27 dBVrms (31.7 Vpk) to -51 dBVrms (3.99 mVpk) in 2 dB steps
  幅度分辨力: 0.016% of full scale (typical)
• 绝对值幅度精度: ±2.92% (0.25 dB) of reading ; ±0.025% of full scale
• CROSS-CHANNEL 增益精度
  Source = Full scale: ±0.04dB
  Source = -20dB full scale: ±0.08dB
• CROSS-CHANNEL 相位精度
  Source = full scale: ±0.5 deg
  Source = -20 dB full scale: ±0.5 deg

动态范围

• FULL SPAN FFT NOISE FLOOR
  Input Range 27 to -35 dBVrms: <-76 dBfs (-85 dBfs typical)
  Input Range -37 to -51 dBVrms: <(-112 - Range) dBfs
• SPURIOUS FREE DYNAMIC RANGE: <-72 dBfs
  (Includes Spurs, Harmonic Distortion, Intermodulation Distortion, Alias Products)
• Zoom Mode Alias Responses
  1.5% to 98.5% of the Frequency Span: <-72 dBfs
  Lower and Upper 1.5% of Frequency Span: <-65 dBfs
• 输入噪声电平
  Above 1280 Hz: <-140 dBVrms / (Sq. R)Hz
  160 Hz to 1.28 kHz (6.4kHz span): <-130 dBVrms / (Sq. R)Hz

输入

• INPUT RANGES: -51 dBVrms to +27 dBVrms
• INPUT IMPEDANCE: 1M ohm ±30% ; < or = 100 pico Farad
• Low Side to Chassis Impedance
  Floating Mode: 1M ohm ±30% (typical)
  <0.01 micro Farad (typical)
• AC COUPLING: <3 dB Rolloff at 1Hz
• COMMON MODE REJECTION
  -51 dBvVrms to -11 dBvVrms Ranges: >80 dB (typical)
  -9 dBVvrms to +9 dBVrms Ranges: >60 dB (typical)
  +11 dBvVrms to +27 dBVrms Ranges >40 dB (typical)
• COMMON MODE RANGE (floating mode): ±4 V pk
• IEPE SIGNAL CONDITIONING
  Current Source: 4.25 ±1.5 mA
  Open Circuit voltage: +26 to +32 Vdc

• 测量结果：时间记录、线性谱、功率谱、功率密度、频率相应、相关、自动/互相关、正态分布、PDF，CDF。 
• 显示类型：单图、双图、两条曲线同图显示、状态及水流图显示。 
• 更新速度：8条曲线/秒 

多种测试方法：

快速傅立叶变换；摆动正弦测试；声频分析；次序分析；相关分析；频率直方图/时间测试等，并具有测试结果加工功能，能使机器对信号的处理达到一定的高档及深度，简化了对一些数据的处理方式。 

应用范围：

1. 时域、频域及幅值域测量 
2. 振动及噪声分析 
3. 控制系统测试及分析 

The Agilent 35665A is a 2-channel Dynamic Signal Analyzer providing measurement solutions in vibration, acoustics, and control systems. Its major options are computed order tracking, real-time octave, swept sine, curve fit and synthesis, arbitrary source, and Instrument BASIC.

Features

• 1-channel at 102.4 kHz, 2 channels at 51.2 kHz.
• 100, 200, 400, 800 lines of resolution.
• Tachometer input.
• Built in 3.5" floppy disk.
• Source: Random, burst random, pink noise, sine, swept-sine, arbitrary, periodic chirp, burst chirp.
• 3.2 M Sample time-capture buffer (optional).
• Measurements: linear spectrum, cross-spectrum, power spectral density, frequency response, time waveform, auto-correlation, cross-correlation, histogram, PDF, CDF.
• Optional real-time octave, computed order tracking, swept-sine, curve fit, synthesis, and arbitrary source. 

Options

• Opt 1D0 Computed Order Tracking Measurements
• Opt 1D1 Real-Time Octave Measurements
• Opt 1D2 Swept-Sine Measurements
• Opt 1D3 Curve Fit/Synthesis
• Opt 1D4 Arbitary Waveform Source
• Opt 1C2 HP Instrument BASIC
• Opt 1C1 Add 2MB Memory
• Opt ANA Add 6MB Memory
• Opt 1F0 Keyboard

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