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High-speed digital oscilloscope bandwidth calibration test device and test method

A technology of digital oscilloscope and test device, applied in the direction of measurement device, instrument, measurement of electrical variables, etc., can solve the problem of reducing the accuracy and error of bandwidth calibration test

Active Publication Date: 2020-10-30
XIAN MICROELECTRONICS TECH INST
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Problems solved by technology

This method of signal power feedback compensation needs to continuously adjust the signal output power according to the power monitoring results. In actual operation, it is difficult to adjust the power level at the reference frequency and the test frequency to the same value, which introduces power compensation errors and reduces the bandwidth of calibration tests. the accuracy of

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  • High-speed digital oscilloscope bandwidth calibration test device and test method
  • High-speed digital oscilloscope bandwidth calibration test device and test method
  • High-speed digital oscilloscope bandwidth calibration test device and test method

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Embodiment

[0058] The bandwidth of digital oscilloscope is calibrated by using analog signal source, power sensor and high-speed digital oscilloscope bandwidth calibration test device based on coaxial air line. Among them, the output port of the analog signal source is 2.4mm, the input port of the power sensor is N type, the input port of the digital oscilloscope is K type, and the analog bandwidth is 18GHz.

[0059] Three ports of the high-speed digital oscilloscope bandwidth calibration testing device of the present embodiment, port1 port is 2.4mm, is connected with the output of analog signal source; port2 port is N type, is connected with the input of power sensor; port3 port is K type, Connect to digital oscilloscope input.

[0060] Set the signal frequency of the analog signal source to the reference frequency of 50MHz, the signal power to 6dBm, the signal amplitude measured by the power sensor to 223.5mV, and the signal amplitude measured by the high-speed digital oscilloscope to ...

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Abstract

The invention discloses a high-speed digital oscilloscope bandwidth calibration test device and test method, and belongs to the field of oscilloscope bandwidth calibration. The testing device comprises a resistor R1, a resistor R2, a resistor R3 and three testing ports; one end of the resistor R1 is connected with a signal input end port 1, the other end of the resistor R1 is connected with one end of the resistor R2 and one end of the resistor R3, the other end of the resistor R2 is connected with a signal output end port 2, and the other end of the resistor R3 is connected with a signal output end port 3; and the signal input end port 1 is used for being connected with an output port of an analog signal source, the signal output end port 2 is used for being connected with an input port of a power sensor, and the signal output end port 3 is used for being connected with a high-speed digital oscilloscope. According to the test method, only the signal frequency of the analog signal source needs to be adjusted, the output power level of the analog signal source does not need to be adjusted, the power compensation error is reduced, and the accuracy of the bandwidth calibration test isimproved.

Description

technical field [0001] The invention belongs to the field of oscilloscope bandwidth calibration, in particular to a high-speed digital oscilloscope bandwidth calibration testing device and testing method. Background technique [0002] In radio parameter measurement test, digital oscilloscope is one of the most basic calibration objects. With the continuous improvement of the bandwidth performance of digital oscilloscopes, the calibration requirements of high-speed digital oscilloscopes have become increasingly prominent. At present, the calibration of high-speed digital oscilloscope bandwidth is usually realized by the measurement standard composed of analog signal source, power divider and power sensor. These measurement standards usually have a variety of different types of test interfaces. The input port of the high-speed digital oscilloscope is usually BNC or K type, the output port of the analog signal source is N type, K type or 2.4mm, and the input port of the power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/007
Inventor 牛文娟秦凯亮饶张飞
Owner XIAN MICROELECTRONICS TECH INST
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