An Oscilloscope Correction Method for Vector-Corrected RF Measurements

Gustafsson, Sebastian; Thorsell, Mattias; Stenarson, J.; Fager, Christian

doi:10.1109/tim.2015.2407451

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…The oscilloscope uses voltage scaling units of mV/division (div) for each of its scale settings, with ten divisions comprising its full vertical range. The 10 mV/div scaling is the setting used in every step of the calibration of the real-time NVNA testbed shown in The impact of scaling on oscilloscope measurements has been studied in detail in [22] using a calibrated VNA in the framework of S-parameter measurements. In this work, we seek instead to quantify the impact of the voltage scaling on a real-time NVNA.…”

Section: Standard Transfer Scaling Characterization and Correctionmentioning

confidence: 99%

Isothermal Characterization of Traps in GaN HEMTs Operating in Class B Using a Real-Time Pulsed-RF NVNA Testbed

Lindquist,

Roblin,

Mikrut

et al. 2024

IEEE Trans. Microwave Theory Techn.

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Section: Standard Transfer Scaling Characterization and Correctionmentioning

confidence: 99%

Isothermal Characterization of Traps in GaN HEMTs Operating in Class B Using a Real-Time Pulsed-RF NVNA Testbed

Lindquist,

Roblin,

Mikrut

et al. 2024

IEEE Trans. Microwave Theory Techn.

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“…Below 14 GHz, the maximum difference in amplitude is 0.5 dB, and this value increases to 1.2 dB at higher frequencies. These ADC characteristics may depend on the settings of the equipment, such as the vertical scale and bandwidth [18].…”

Section: Frequency Responses Of Adcsmentioning

confidence: 99%

Traceable calibration for a digital real-time oscilloscope with time interleaving architecture

Kim

Lee

et al. 2017

Meas. Sci. Technol.

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Impairments of analog-to-digital converters (ADCs) used in digital real-time oscilloscopes (DRTO) have caused inevitable signal distortions in measurements. To calibrate these errors with traceability, we propose a novel method that consists of two steps. First, each transfer function of the ADCs is measured using pulse trains from a photodiode calibrated up to 110 GHz. Each data set of the ADCs is superimposed to convert the repetitive pulse to a single pulse to solve the under-sampling problem of the separated data depending on each ADC. Then, the signals of the device under test (DUT) are also separated and superimposed depending on the ADCs, and they are calibrated in the frequency domain based on the measured transfer functions. After a calibration process, the data set is reconverted to the time domain to achieve traceable calibration. To verify our method, we have measured the output of another 70 GHz photodiode with a calibrated DRTO. In terms of results, time-interleaved errors are suppressed by more than 24 dB up to the bandwidth of the DRTO.

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“…All of the instruments in the setup share a 10 MHz reference clock, and the arbitrary waveform generator triggers the LF and RF digitizers. The calibration routine of the setup, which includes absolute power and phase calibration, is based on the methods presented in [4], [5].…”

Section: Measurement Setup Descriptionmentioning

confidence: 99%

Vector-corrected nonlinear multi-port IQ-mixer characterization using modulated signals

Gustafsson

Thorsell

Buisman

et al. 2017

2017 IEEE MTT-S International Microwave Symposium (IMS)

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In this paper, large-signal operation of IQ-mixers is studied using a vector-corrected four-port measurement setup with modulated signals as stimuli. The measurement setup presents unique characterization possibilities since it has two ports at low/baseband frequencies and two ports at RF, making it ideal for characterization of frequency-translating devices such as mixers. A commercial upconverting IQ-mixer is studied, with the I and Q input signals residing at incommensurate frequency grids, enabling separation of the nonlinear distortion generated in the I and Q branches. Frequency-domain and time-domain measurements reveal imbalances between the I and Q branches in terms of conversion gain and nonlinear distortion. It is also shown for the same mixer that operating the I and Q branches concurrently has limited influence on both conversion gain and nonlinear distortion, compared to non-concurrent operation.

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An Oscilloscope Correction Method for Vector-Corrected RF Measurements

Cited by 15 publications

References 15 publications

Isothermal Characterization of Traps in GaN HEMTs Operating in Class B Using a Real-Time Pulsed-RF NVNA Testbed

Isothermal Characterization of Traps in GaN HEMTs Operating in Class B Using a Real-Time Pulsed-RF NVNA Testbed

Traceable calibration for a digital real-time oscilloscope with time interleaving architecture

Vector-corrected nonlinear multi-port IQ-mixer characterization using modulated signals

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