公开(公告)号：US20190204356A1

公开(公告)日：2019-07-04

申请号：US15859596

申请日：2017-12-31

Applicant: Tektronix, Inc.

Inventor： Michael J. Mende ,  Daniel G. Knierim ,  Richard A. Booman

IPC: G01R1/07 ,  G01R1/28

CPC classification number: G01R15/241 ,  G01R29/0885 ,  G01R31/308 ,  G01R31/31728

Abstract: A mechanism is included for receiving a phase modulated optical signal. The phase modulated signal is modulated by a remote electrical test signal at a sensor head. A reference optical signal is also received. A phase difference between the phase modulated optical signal and the reference optical signal is then determined. The phase difference is employed to recover the remote electrical test signal from the sensor head. The phase difference may be determined by employing a phase modulator in a controller that tracks a phase modulator in the sensor head. The phase difference may also be determined by comparison of the signals in the complex signal domain.

公开(公告)号：US10225022B2

公开(公告)日：2019-03-05

申请号：US15394670

申请日：2016-12-29

Applicant: TEKTRONIX, INC.

Inventor： Richard A. Booman ,  Michael J. Mende ,  Daniel G. Knierim

IPC: H04B10/00 ,  H04B10/80 ,  H04B10/532 ,  G01R15/24 ,  G01R29/08 ,  G01R31/308

Abstract: An electro-optical sensor comprises an optical input configured to receive an optical carrier via an upstream fiber. The electro-optical sensor also includes an optical modulator configured to modulate an electrical signal onto the optical carrier to create an optical signal. The electro-optical sensor further includes an optical output configured to transmit the optical signal via a downstream fiber. The electro-optical sensor employs a variation output configured to transmit variation data indicating variation in the received optical carrier to support compensation for corresponding variation in the optical signal.

公开(公告)号：US20170353248A1

公开(公告)日：2017-12-07

申请号：US15394670

申请日：2016-12-29

Applicant: TEKTRONIX, INC.

Inventor： Richard A. Booman ,  Michael J. Mende ,  Daniel G. Knierim

IPC: H04B10/80 ,  H04B10/532

CPC classification number: H04B10/801 ,  G01R15/241 ,  G01R29/0885 ,  G01R31/308 ,  H04B10/532

Abstract: An electro-optical sensor comprises an optical input configured to receive an optical carrier via an upstream fiber. The electro-optical sensor also includes an optical modulator configured to modulate an electrical signal onto the optical carrier to create an optical signal. The electro-optical sensor further includes an optical output configured to transmit the optical signal via a downstream fiber. The electro-optical sensor employs a variation output configured to transmit variation data indicating variation in the received optical carrier to support compensation for corresponding variation in the optical signal.

公开(公告)号：US20170077939A1

公开(公告)日：2017-03-16

申请号：US15347600

申请日：2016-11-09

Applicant: Tektronix, Inc.

Inventor： Daniel G. Knierim

IPC: H03M1/12

CPC classification number: H03M1/121 ,  G01R13/0236 ,  G01R13/0272 ,  G01R19/2506 ,  H03M1/1215

Abstract: A test and measurement instrument, including a splitter configured to split an input signal having a particular bandwidth into a plurality of split signals, each split signal including substantially the entire bandwidth of the input signal, a plurality of harmonic mixers, each harmonic mixer configured to mix an associated split signal of the plurality of split signals with an associated harmonic signal to generate an associated mixed signal, a plurality of digitizers, each digitizer configured to digitize a mixed signal of an associated harmonic mixer of the plurality of harmonic mixers, and a linear time-periodic filter configured to receive the digitized mixed signal from each of the digitizers and output a time-interleaved signal. A first-order harmonic of at least one harmonic signal associated with the harmonic mixers is different from a sample rate of at least one of the digitizers.

Abstract translation: 一种测试和测量仪器，包括分配器，其被配置为将具有特定带宽的输入信号分成多个分离信号，每个分离信号基本上包括输入信号的整个带宽，多个谐波混频器，每个谐波混频器被配置为 将所述多个分离信号的相关联的分离信号与相关联的谐波信号混合以产生相关联的混合信号，多个数字化仪，每个数字转换器被配置为数字化所述多个谐波混合器中的相关联的谐波混频器的混合信号，以及 线性时间周期滤波器，被配置为从每个数字转换器接收数字化的混合信号，并输出时间交织的信号。 与谐波混频器相关联的至少一个谐波信号的一阶谐波与至少一个数字化仪的采样率不同。

公开(公告)号：US09568503B2

公开(公告)日：2017-02-14

申请号：US14971727

申请日：2015-12-16

Applicant: Tektronix, Inc.

Inventor： Daniel G. Knierim ,  Barton T. Hickman

IPC: G01R23/14 ,  G01R13/02 ,  H03M1/12

CPC classification number: G01R13/0272 ,  H03M1/06 ,  H03M1/1009 ,  H03M1/121

Abstract: A test and measurement instrument includes a coefficient storage facility coupled to a programmable filter. The coefficient storage facility is configured to store at least two pre-determined filter coefficient sets, and configured to pass a selected one of the at least two pre-determined filter coefficient sets to the filter based on a measurement derived using a compensation oscillator. The measurement may include clock delay and clock skew. In some examples the test and measurement instrument may additionally adjust clock delay and/or clock skew in addition to selecting appropriate filter coefficients.

Abstract translation: 测试和测量仪器包括耦合到可编程滤波器的系数存储设备。 系数存储设施被配置为存储至少两个预定的滤波器系数组，并且被配置为基于使用补偿振荡器导出的测量将所选择的至少两个预定滤波器系数组中的一个传送到滤波器。 测量可能包括时钟延迟和时钟偏移。 在一些示例中，除了选择适当的滤波器系数之外，测试和测量仪器还可以另外调节时钟延迟和/或时钟偏移。

公开(公告)号：US09432042B2

公开(公告)日：2016-08-30

申请号：US14229307

申请日：2014-03-28

Applicant: Tektronix, Inc.

Inventor： Daniel G. Knierim ,  John J. Pickerd

IPC: H03M1/12 ,  G01R23/14 ,  G01R13/02

CPC classification number: H03M1/121 ,  G01R13/0272 ,  G01R23/14 ,  H03M1/1215

Abstract: A test and measurement instrument including a splitter configured to split an input signal having a particular bandwidth into a plurality of split signals, each split signal including substantially the entire bandwidth of the input signal; a plurality of harmonic mixers, each harmonic mixer configured to mix an associated split signal of the plurality of split signals with an associated harmonic signal to generate an associated mixed signal; and a plurality of digitizers, each digitizer configured to digitize a mixed signal of an associated harmonic mixer of the plurality of harmonic mixers. A first-order harmonic of at least one harmonic signal associated with the harmonic mixers is different from an effective sample rate of at least one of the digitizers.

公开(公告)号：US20160216295A1

公开(公告)日：2016-07-28

申请号：US14971727

申请日：2015-12-16

Applicant: Tektronix, Inc.

Inventor： Daniel G. Knierim ,  Barton T. Hickman

IPC: G01R13/02 ,  H03M1/12

CPC classification number: G01R13/0272 ,  H03M1/06 ,  H03M1/1009 ,  H03M1/121

Abstract: A test and measurement instrument includes a coefficient storage facility coupled to a programmable filter. The coefficient storage facility is configured to store at least two pre-determined filter coefficient sets, and configured to pass a selected one of the at least two pre-determined filter coefficient sets to the filter based on a measurement derived using a compensation oscillator. The measurement may include clock delay and clock skew. In some examples the test and measurement instrument may additionally adjust clock delay and/or clock skew in addition to selecting appropriate filter coefficients.

Abstract translation: 测试和测量仪器包括耦合到可编程滤波器的系数存储设备。 系数存储设施被配置为存储至少两个预定的滤波器系数组，并且被配置为基于使用补偿振荡器导出的测量将所选择的至少两个预定滤波器系数组中的一个传送到滤波器。 测量可能包括时钟延迟和时钟偏移。 在一些示例中，除了选择适当的滤波器系数之外，测试和测量仪器还可以另外调节时钟延迟和/或时钟偏移。

公开(公告)号：US08723530B2

公开(公告)日：2014-05-13

申请号：US13854566

申请日：2013-04-01

Applicant: Tektronix, Inc.

Inventor： Josiah A. Bartlett ,  Ira G. Pollock ,  Daniel G. Knierim ,  Lester L. Larson ,  Scott R. Jansen ,  Kenneth P. Dobyns ,  Michael Duane Stevens

IPC: G01R35/00

CPC classification number: G01R35/005 ,  G01R1/06766

Abstract: A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the signal acquisition probe is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth.

Abstract translation: 信号采集系统具有信号采集探针，其具有耦合到电阻中心导体信号电缆的探针尖端电路。 信号采集探头的电阻中心导体信号电缆通过输入节点和信号处理仪器中的输入电路耦合到信号处理仪器中的补偿系统。 信号采集探头和信号处理仪器在输入节点处具有不匹配的时间常数，补偿系统提供极零对，以保持信号采集系统频率带宽的平坦度。