公开(公告)号：US09939479B2

公开(公告)日：2018-04-10

申请号：US14260976

申请日：2014-04-24

Applicant: Keysight Technologies, Inc.

Inventor： David J. Ballo ,  James B. Kerr ,  Robert E. Shoulders

IPC: G01R29/26 ,  G01R23/20 ,  G01R27/28

CPC classification number: G01R29/26 ,  G01R23/20 ,  G01R27/28

Abstract: A method of determining a noise figure (NF) response of a device under test (DUT) comprises determining a frequency response of a noise receiver over a first frequency range, measuring a gain of the DUT over a second frequency range encompassing the first frequency range, measuring output-noise power of the DUT over the second frequency range, determining an estimated gain of the DUT based on the frequency response of the noise receiver and the gain of the DUT over the first frequency range, and determining the NF response of the DUT over the second frequency range based on the estimated gain and the output-noise power.

公开(公告)号：US09678123B2

公开(公告)日：2017-06-13

申请号：US14710476

申请日：2015-05-12

Applicant: Keysight Technologies, Inc.

Inventor： Joel P. Dunsmore ,  Jean-Pierre Teyssier ,  Jad Faraj ,  James B. Kerr

IPC: H04W24/08 ,  G01R23/16

CPC classification number: G01R23/16 ,  G01R23/163

Abstract: A radio frequency (RF) measurement system acting as a spectrum analyzer and a method of operating the same eliminates image signals from a detected input RF spectrum. The method includes determining at least three local oscillator (LO) frequencies; determining LO offsets between the LO frequencies; and mixing the LO frequencies with the input RF spectrum to provide corresponding intermediate frequency (IF) signals having an IF bandwidth, where at least one of the IF signals has the input RF spectrum mixed to a different portion of the IF bandwidth than at least one other of the IF signals, providing overlapping coverage. The method further includes acquiring ADC time records for the IF signals; performing Fourier transforms (FTs) on the ADC time records to provide IF spectrums; and detecting RF responses from the IF spectrums to determine an RF response trace corresponding to the input RF spectrum.

公开(公告)号：US20150309101A1

公开(公告)日：2015-10-29

申请号：US14260976

申请日：2014-04-24

Applicant: Keysight Technologies, Inc.

Inventor： David J. Ballo ,  James B. Kerr ,  Robert E. Shoulders

IPC: G01R29/26 ,  G01R31/317 ,  G01R23/20

CPC classification number: G01R29/26 ,  G01R23/20 ,  G01R27/28

Abstract: A method of determining a noise figure (NF) response of a device under test (DUT) comprises determining a frequency response of a noise receiver over a first frequency range, measuring a gain of the DUT over a second frequency range encompassing the first frequency range, measuring output-noise power of the DUT over the second frequency range, determining an estimated gain of the DUT based on the frequency response of the noise receiver and the gain of the DUT over the first frequency range, and determining the NF response of the DUT over the second frequency range based on the estimated gain and the output-noise power.

Abstract translation: 确定被测设备（DUT）的噪声系数（NF）响应的方法包括：在第一频率范围内确定噪声接收机的频率响应，在包括第一频率范围的第二频率范围内测量DUT的增益 测量所述DUT在所述第二频率范围上的输出噪声功率，基于所述噪声接收机的频率响应和所述DUT在所述第一频率范围内的增益来确定所述DUT的估计增益，以及确定所述DUT的NF响应 基于估计的增益和输出噪声功率在第二频率范围内的DUT。

公开(公告)号：US20160337887A1

公开(公告)日：2016-11-17

申请号：US14710476

申请日：2015-05-12

Applicant: Keysight Technologies, Inc.

Inventor： Joel P. Dunsmore ,  Jean-Pierre Teyssier ,  Jad Faraj ,  James B. Kerr

IPC: H04W24/08

CPC classification number: G01R23/16 ,  G01R23/163

Abstract: A radio frequency (RF) measurement system acting as a spectrum analyzer and a method of operating the same eliminates image signals from a detected input RF spectrum. The method includes determining at least three local oscillator (LO) frequencies; determining LO offsets between the LO frequencies; and mixing the LO frequencies with the input RF spectrum to provide corresponding intermediate frequency (IF) signals having an IF bandwidth, where at least one of the IF signals has the input RF spectrum mixed to a different portion of the IF bandwidth than at least one other of the IF signals, providing overlapping coverage. The method further includes acquiring ADC time records for the IF signals; performing Fourier transforms (FTs) on the ADC time records to provide IF spectrums; and detecting RF responses from the IF spectrums to determine an RF response trace corresponding to the input RF spectrum.

Abstract translation: 用作频谱分析仪的射频（RF）测量系统及其操作方法从检测到的输入RF频谱中消除图像信号。 该方法包括确定至少三个本地振荡器（LO）频率; 确定LO频率之间的LO偏移; 以及将所述LO频率与所述输入RF频谱混合以提供具有IF带宽的相应的中频（IF）信号，其中所述IF信号中的至少一个将所述输入RF频谱混合到所述IF带宽的不同部分， 其他IF信号，提供重叠覆盖。 该方法还包括获取IF信号的ADC时间记录; 在ADC时间记录上执行傅里叶变换（FTs）以提供IF频谱; 以及检测来自IF频谱的RF响应，以确定对应于输入RF频谱的RF响应迹线。