JPS5554463A - Measuring instrument for ratio of noise power to carrier - Google Patents
Measuring instrument for ratio of noise power to carrierInfo
- Publication number
- JPS5554463A JPS5554463A JP9731578A JP9731578A JPS5554463A JP S5554463 A JPS5554463 A JP S5554463A JP 9731578 A JP9731578 A JP 9731578A JP 9731578 A JP9731578 A JP 9731578A JP S5554463 A JPS5554463 A JP S5554463A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- carrier
- inputted
- noise power
- signal
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To make high-precision continuous measurement possible by securing operation stable to variations in frequency and level of an input signal by combining AFC, AGC, PLL, etc., into one.
CONSTITUTION: A carrier and signal of noises inputted from terminal 1 are inputted through band limiter 2 to AFC circuit 3, where it is frequency converted by the output signal of local oscillator 25, and its output is adjusted by AGC amplifier 10 of AGC circuit 4 so that a carrier level will be a normal value at any time. Then, PLL circuit 5 locks a carrier frequency, but is constituted with the follow-up range of a loop narrowed extremely, so that the noise component of a signal inputted from circuit 4 to circuit 5 will be inputted as an error signal to noise power measurement circuit 6. Since carrier power has been adjusted by circuit to the normal value, a ratio of noise power to carrier is in inverse proportion to a noise power value measured by circuit 6. Therefore, it is calibrated by display circuit 7 to know the normal value immediately.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9731578A JPS5554463A (en) | 1978-08-11 | 1978-08-11 | Measuring instrument for ratio of noise power to carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9731578A JPS5554463A (en) | 1978-08-11 | 1978-08-11 | Measuring instrument for ratio of noise power to carrier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5554463A true JPS5554463A (en) | 1980-04-21 |
Family
ID=14189045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9731578A Pending JPS5554463A (en) | 1978-08-11 | 1978-08-11 | Measuring instrument for ratio of noise power to carrier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5554463A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5816565U (en) * | 1981-07-25 | 1983-02-01 | ソニー株式会社 | Level measurement circuit |
JPS58187873A (en) * | 1982-04-27 | 1983-11-02 | Nec Corp | Carrier/noise detector |
-
1978
- 1978-08-11 JP JP9731578A patent/JPS5554463A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5816565U (en) * | 1981-07-25 | 1983-02-01 | ソニー株式会社 | Level measurement circuit |
JPH0325182Y2 (en) * | 1981-07-25 | 1991-05-31 | ||
JPS58187873A (en) * | 1982-04-27 | 1983-11-02 | Nec Corp | Carrier/noise detector |
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