JPS56112659A - Measuring method for sweep distortion in frequency - Google Patents
Measuring method for sweep distortion in frequencyInfo
- Publication number
- JPS56112659A JPS56112659A JP1488580A JP1488580A JPS56112659A JP S56112659 A JPS56112659 A JP S56112659A JP 1488580 A JP1488580 A JP 1488580A JP 1488580 A JP1488580 A JP 1488580A JP S56112659 A JPS56112659 A JP S56112659A
- Authority
- JP
- Japan
- Prior art keywords
- measured
- frequency
- outputs
- square wave
- wave signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/16—Spectrum analysis; Fourier analysis
- G01R23/20—Measurement of non-linear distortion
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE:To make it possible to measure the existence of nonlinear distortions and the ratio thereof if any in a system with relatively good linearity, by adding square wave signals to the system to be measured and detecting the even-numbers times of frequency constituents of the basic frequency of the square wave signals from the output signals of the system to be measured. CONSTITUTION:From a voltage control oscillator 2 controlled by a voltage scanning circuit 1, the square wave signals are output whose cycle is increased as time proceeds, and divided by the frequency divider 3 and added to the system 6 to be measured through the amplifier 5. The output signals from the system 6 to be measured are added to a low pass filter 8 through an attenuator 7, and the outputs of the filter are filtered by the switched capacitor filter 9 to which the outputs of the voltage control oscillator 2 which are devided by a frequency devider 4 are applied as the trigger signals, and the constituents with even-numbered times of the basic frequency of the square wave signals are selected. The outputs are applied to the low pass filter 10 and the unnecessary constituents from the outputs of the switched capacitor filter are removed. With such an arrangement, the existence of the nonlinear distortions and the ratio thereof if any in the system to be measured with relatively good linearity can be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1488580A JPS56112659A (en) | 1980-02-12 | 1980-02-12 | Measuring method for sweep distortion in frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1488580A JPS56112659A (en) | 1980-02-12 | 1980-02-12 | Measuring method for sweep distortion in frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56112659A true JPS56112659A (en) | 1981-09-05 |
Family
ID=11873462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1488580A Pending JPS56112659A (en) | 1980-02-12 | 1980-02-12 | Measuring method for sweep distortion in frequency |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56112659A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61108973A (en) * | 1984-10-31 | 1986-05-27 | Pioneer Electronic Corp | Frequency characteristic detector |
-
1980
- 1980-02-12 JP JP1488580A patent/JPS56112659A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61108973A (en) * | 1984-10-31 | 1986-05-27 | Pioneer Electronic Corp | Frequency characteristic detector |
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