JPS55144554A - Spectrum analyzer - Google Patents
Spectrum analyzerInfo
- Publication number
- JPS55144554A JPS55144554A JP5201579A JP5201579A JPS55144554A JP S55144554 A JPS55144554 A JP S55144554A JP 5201579 A JP5201579 A JP 5201579A JP 5201579 A JP5201579 A JP 5201579A JP S55144554 A JPS55144554 A JP S55144554A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- local oscillator
- output
- narrow
- spectrum
- 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.)
- Granted
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE: To stably and accurately observe the narrow band spectrum by a spectrum analyzer by inserting a sample-holding circuit thereinto to correct only the frequency variation of a voltage controlled variable local oscillator and stabilizing the local oscillator.
CONSTITUTION: When switches S1, S2 are set as shown, a local oscillator Of is controlled by the output of a lamp voltage generator R to sweep in narrow frequency band. Since the output frequency of the local oscillator Ov retains substantially predetermined constant value determined by a voltage source V, the narrow higher and lower frequency range spectrum is presented in an oscillograph B around the desired frequency determined by the adjustment of the voltage source V as a center. In this case, the output of a frequency discriminator Df is applied through a sample-holding circuit H and amplifiers A, E to a voltage controlled variable frequency local oscillator Ov. Therefore, the frequency variation is eliminated to stably produce a predetermined constant local oscillating frequency therefrom. Since the output of the discriminator Df is intermittently extracted and retained in the circuit H to control the local oscillator Ov, the narrow band spectrum can be accurately observed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5201579A JPS55144554A (en) | 1979-04-28 | 1979-04-28 | Spectrum analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5201579A JPS55144554A (en) | 1979-04-28 | 1979-04-28 | Spectrum analyzer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55144554A true JPS55144554A (en) | 1980-11-11 |
JPS5760579B2 JPS5760579B2 (en) | 1982-12-20 |
Family
ID=12902979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5201579A Granted JPS55144554A (en) | 1979-04-28 | 1979-04-28 | Spectrum analyzer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55144554A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4654886A (en) * | 1985-04-25 | 1987-03-31 | Ifr, Inc. | Local oscillator null circuit and method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08928Y2 (en) * | 1990-11-30 | 1996-01-17 | 新次 滝沢 | Chopstick rest |
-
1979
- 1979-04-28 JP JP5201579A patent/JPS55144554A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4654886A (en) * | 1985-04-25 | 1987-03-31 | Ifr, Inc. | Local oscillator null circuit and method |
Also Published As
Publication number | Publication date |
---|---|
JPS5760579B2 (en) | 1982-12-20 |
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