JPS6435386A - Spectrum analyzer - Google Patents
Spectrum analyzerInfo
- Publication number
- JPS6435386A JPS6435386A JP19215987A JP19215987A JPS6435386A JP S6435386 A JPS6435386 A JP S6435386A JP 19215987 A JP19215987 A JP 19215987A JP 19215987 A JP19215987 A JP 19215987A JP S6435386 A JPS6435386 A JP S6435386A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- vco
- voltage
- controlled oscillator
- accuracy
- 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
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE:To increase the frequency accuracy of a voltage-controlled oscillator and to improve the accuracy of a spectrum analyzer by counting the oscillation frequency of the voltage-controlled oscillator and feeding it back so as to make an adjustment to a preset sweep frequency. CONSTITUTION:An input signal fi is connected to an AD converter 22 through a low-pass filter 1, a mixer 2, a BPF amplifier 4, a BPF, and detection systems 5-9 and the output of the converter is applied to the longitudinal axis of a CRT 10 through a processor 16 and a CRT interface 23. The VCO (voltage- controlled oscillator) 3 is connected to the mixer 2 and a frequency fv which varies with a signal based on the outputs of a DA oscillator 24 and a feedback circuit 21 is applied. A counter 18 counts the frequency fv and a comparator 19 compares it with the preset frequency; and the frequency is fed back to the input of the VCO 3 through a feedback circuit 21 to increase the oscillation frequency accuracy of the VCO 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62192159A JPH0619392B2 (en) | 1987-07-31 | 1987-07-31 | Spectrum analyzer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62192159A JPH0619392B2 (en) | 1987-07-31 | 1987-07-31 | Spectrum analyzer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6435386A true JPS6435386A (en) | 1989-02-06 |
JPH0619392B2 JPH0619392B2 (en) | 1994-03-16 |
Family
ID=16286674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62192159A Expired - Lifetime JPH0619392B2 (en) | 1987-07-31 | 1987-07-31 | Spectrum analyzer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0619392B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9353825B2 (en) | 2013-07-18 | 2016-05-31 | Denso Corporation | Vibration absorbing apparatus |
CN113341225A (en) * | 2021-08-06 | 2021-09-03 | 北京嘉普之光科技有限公司 | Panoramic frequency high-speed scanning method and device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52135040U (en) * | 1976-04-08 | 1977-10-14 |
-
1987
- 1987-07-31 JP JP62192159A patent/JPH0619392B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52135040U (en) * | 1976-04-08 | 1977-10-14 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9353825B2 (en) | 2013-07-18 | 2016-05-31 | Denso Corporation | Vibration absorbing apparatus |
CN113341225A (en) * | 2021-08-06 | 2021-09-03 | 北京嘉普之光科技有限公司 | Panoramic frequency high-speed scanning method and device |
CN113341225B (en) * | 2021-08-06 | 2021-11-12 | 北京嘉普之光科技有限公司 | Panoramic frequency high-speed scanning method and device |
Also Published As
Publication number | Publication date |
---|---|
JPH0619392B2 (en) | 1994-03-16 |
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