摘要:
A mixed mode vector network analyzer (VNA) system to measure S- parameters and DC parameters of a differential device under test (DUT) is provided. The mixed mode VNA system measures mixed mode S-parameter measurements (i.e., AC measurements) using an independent resistive reflectometer bridge connected to each of the two ports of the differential DUT. The mixed mode VNA system further measures DC parameters of the differential DUT without impacting the measurement of S-parameters. In one embodiment, the mixed mode VNA system is used to measure multi-port differential DUT. Coupling capacitors provide low enough impedance to even the smallest RF frequency of AC measurement (i.e., measurement of S-parameters).
摘要:
Die vorliegende Erfindung betrifft ein Inline-Kalibriermodul (10) zur dynamischen Streuparameter-Prüfsystemkalibrierung in einer Testumgebung, mit mindestens drei voneinander unabhängigen, schaltbaren Kalibrierimpedanzen (11,12,13) mit jeweils einem vorbestimmten Impedanzwert (Z1,Z2,Z3), die jeweils voneinander unabhängige Kalibrierstandards bezeichnen, mit einem Ausgang (15), der dazu ausgebildet ist, das Kalibriermodul mit einem zu testenden Gerät zu koppeln, mit einem als serielle Busschnittstelle ausgebildeten Steuereingang (16), der dazu ausgebildet ist, das Kalibriermodul zur Steuerung desselben mit einer externen Steuereinrichtung zu koppeln. Die vorliegende Erfindung betrifft ferner eine programm-gesteuerte Einrichtung sowie ein Kalibrier- und Mess-System.
摘要:
Die vorliegende Erfindung betrifft ein Inline-Kalibriermodul (10) zur dynamischen Streuparameter-Prüfsystemkalibrierung in einer Testumgebung, mit mindestens drei voneinander unabhängigen, schaltbaren Kalibrierimpedanzen (11,12,13) mit jeweils einem vorbestimmten Impedanzwert (Z1,Z2,Z3), die jeweils voneinander unabhängige Kalibrierstandards bezeichnen, mit einem Ausgang (15), der dazu ausgebildet ist, das Kalibriermodul mit einem zu testenden Gerät zu koppeln, mit einem als serielle Busschnittstelle ausgebildeten Steuereingang (16), der dazu ausgebildet ist, das Kalibriermodul zur Steuerung desselben mit einer externen Steuereinrichtung zu koppeln. Die vorliegende Erfindung betrifft ferner eine programm-gesteuerte Einrichtung sowie ein Kalibrier- und Mess-System.
摘要:
A method and apparatus for determining the impedance of the plurality of channels comprising a plurality of channels having a plurality of first channels and a plurality of second channels, at least one reference channel, a signal generator electrically connected to the plurality of channels, a reference signal generator connected to the reference channel, at least one amplifier connected to each of the plurality of channels and the reference channel and at least one filter connected to an output of the at least one amplifier to filter the output signal from the at least one amplifier. The signal generator is configured to provide a plurality of input signals to the plurality of channels. The reference signal generator provides an input signal to the reference channel.
摘要:
The invention relates to a device for calibrating vector network analysers, implemented by means of SIC, ESIW and microstrip technologies. The calibration device of the invention is characterised in that it is a modular device comprising connection modules (5) connected to the vector analyser and to calibration modules (which can be SIC, ESIW or microstrip modules). This modular configuration allows the noises that are intrinsic to the connection to the analyser (including transfers to microstrip, SIC, etc.) to be the same in all of the calibration measurements, allowing the noises associated with each connection to be detected and/or eliminated.
摘要:
A test and measurement system includes a signal creation tool to generate a complex-valued stimulus signal, at least one waveform generator to receive the stimulus signal and produce at least one pair of baseband signals, a test instrument to capture the at least one pair of baseband signals and produce captured baseband signals, a pre-compensation coefficients estimation block to receive the captured baseband signals, characterize the captured baseband signals and to generate pre-compensation coefficients, and a pre-compensation block to apply the pre-compensation coefficients to the complex-valued stimulus signal when there is a device under test. A method of characterizing a test system includes generating a multi-tone stimulus signal, producing at least one pair of baseband signals form the multi-tone stimulus signal, capturing the at least one pair of baseband signals with a test instrument, characterizing the at least one pair of baseband signals to generate pre-compensation coefficients, and applying the pre-compensation coefficients to signals applied to a device under test.
摘要:
An impedance tuner having an RF transmission line, with a single lead screw extending along the RF transmission line. A plurality of movable carriages are engaged with the lead screw, wherein each of the plurality of movable carriages is configured for independent movement relative to other carriages. A motorized drive system drives the plurality of movable carriages independently along the lead screw.
摘要:
A vector network analyzer (VNA) can include a control processor, a plurality of receivers coupled with the control processor, the plurality of receivers having a common signal generator source, and a coupler/power divider network configured to distribute each of a plurality of source reference signals to a corresponding one of the plurality of receivers.
摘要:
The present invention relates to current measurement apparatus 100. The current measurement apparatus 100 comprises a measurement arrangement 110, 114 which is configured to be disposed in relation to a load 108 which draws a current signal, the measurement arrangement being operative when so disposed to measure the load drawn current signal. The current measurement apparatus 100 also comprises a signal source 112 which is operative to apply a reference input signal to the measurement arrangement 110, 114 whereby an output signal from the measurement arrangement comprises a load output signal corresponding to the load drawn current signal and a reference output signal corresponding to the reference input signal. The current measurement apparatus 100 further comprises processing apparatus 116 which is operative to receive the output signal and to make a determination in dependence on the reference output signal and the load output signal, the determination being in respect of at least one of the load drawn current signal and electrical power consumed by the load.
摘要:
The invention relates to a measuring apparatus having a synthesizer device (49c), at least two control devices (86c, 86d), and at least two controlled oscillators (64c, 64d). The synthesizer device (49c) comprises at lest one direct digital synthesizer (50c, 50d) and generates at least two signals of known phase ratios. Signals generated by the synthesizer device (49c) form reference signals of at least one control device (86c, 86d). Signals formed by the control devices (86c, 86d) control the controlled oscillators (64c, 64d). The measuring apparatus comprises only frequency dividers dividing by whole-number dividing factors.