JPH1151974A - Probe adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the voltage level of an optional frequency in a wide band without using a spectrum analyzer by storing the A/D converter of a BPF, the frequency band variable volume control of the filter, and a switch by passing them. SOLUTION: When the voltage level of a signal line and the timing of the wave-form are to be confirmed, a BPF is short-circuited by a switch 3, and the signal to be measured is inputted to an input connector 21 via a probe 1. The A/D converter 4 of the BPF digitizes the signal to be measured and outputs it to a microcomputer 5. The microcomputer 5 samples the signal to be measured at the frequency set by a frequency changing volume control 7, calculates it, and outputs the change quantity of the voltage level to a D/A converter 6. The D/A converter 6 again converts it into an analog value and transmits it to an oscilloscope 8. When the digitally converted BPF is inserted, the voltage level of an optional frequency in a wide band can be measured without using a spectrum analyzer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a probe adapter, and more particularly, to a probe adapter for a probe used in a development business in which EMI measures are taken.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 5, the oscilloscope 8 and the probe 1 for confirming the voltage waveform and the spectrum analyzer 108 and the probe 101 for confirming the frequency level are both used as measuring instruments.

[0003]

As described above, in the conventional probe device, both the oscilloscope 8 and the spectrum analyzer 108 are required to confirm the countermeasure effect of the signal line, and the spectrum analyzer 108 attenuates the frequency level. There is a problem in that the actual voltage level is unknown in terms of the amount.

An object of the present invention is to provide a probe adapter capable of measuring a voltage level at an arbitrary frequency over a wide band without using a spectrum analyzer.

[0005]

In order to solve the above-mentioned problems, a probe adapter according to the present invention comprises a probe for detecting a signal to be measured and an A / D for digitally converting the signal to be measured detected by the probe. Converter and this A / D
A microcomputer that samples the signal under test digitally converted by the converter, a D / A converter that converts the signal under test sampled by the microcomputer into an analog signal, and a signal that is analog-converted by the D / A converter. It is characterized by comprising a connector for transmitting to the oscilloscope, and a switch connected between the A / D converter and the D / A converter for bypassing the signal under measurement.

[0006]

Next, a probe adapter according to an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a probe adapter according to an embodiment of the present invention includes a probe 1 for detecting a signal to be measured and an A / D converter for digitally converting the signal to be measured detected by the probe 1. 4, a microcomputer 5 for sampling the signal to be measured digitally converted by the A / D converter 4, a D / A converter 6 for converting the signal to be measured sampled by the microcomputer 5 to analog, A connector 22 for transmitting the signal under test analog-converted by the A converter 6 to the oscilloscope 8, a switch 3 connected between the A / D converter 4 and the D / A converter 6 for bypassing the signal under test, and a switch for changing the frequency. And a volume 7.

Next, the operation of the probe adapter according to one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the operation of the probe adapter according to the embodiment of the present invention is as follows. When the switch 3 checks the voltage level of the signal line and the timing of the waveform, the band-pass filter is short-circuited, and The measurement signal is input to the input connector 21 via the probe 1, the A / D converter 4 of the band-pass filter digitizes the signal to be measured and outputs it to the microcomputer 5, and the microcomputer 6 uses the volume 7 for frequency change. At the set frequency, the signal under measurement is sampled and calculated, and the amount of change in the voltage level is output to the D / A converter 6, converted into an analog signal again, and transmitted to the oscilloscope 8.

[0010]

As described above, according to the probe adapter of the present invention, by inserting a digital-converted band-pass filter, it is possible to measure the voltage level of an arbitrary frequency over a wide band without using a spectrum analyzer. There is an effect that can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram of a probe adapter according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional probe device.

[Explanation of symbols]

 Reference Signs List 1 probe 2 probe adapter 3 switch 4 A / D converter 5 microcomputer 6 D / A converter 7 microcomputer (volume) 8 oscilloscope 21, 22 probe adapter (connector)

Claims (1)

[Claims] A probe for detecting a signal to be measured, an A / D converter for digitally converting the signal to be measured detected by the probe, and a micro-sampler for sampling the signal to be measured digitally converted by the A / D converter. A computer, a D / A converter for converting a signal under test sampled by the microcomputer into an analog signal, a connector for transmitting the signal under test analog-converted by the D / A converter to an oscilloscope, and bypassing the signal under test. A probe adapter comprising the A / D converter and a switch connected between the D / A converter.