JPS6421371A - Leakage spot detector - Google Patents
Leakage spot detectorInfo
- Publication number
- JPS6421371A JPS6421371A JP62177417A JP17741787A JPS6421371A JP S6421371 A JPS6421371 A JP S6421371A JP 62177417 A JP62177417 A JP 62177417A JP 17741787 A JP17741787 A JP 17741787A JP S6421371 A JPS6421371 A JP S6421371A
- Authority
- JP
- Japan
- Prior art keywords
- mixer
- signal
- detector
- output
- frequency amplifier
- 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
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE:To accurately detect the signal leakage spot in a broadcasting/ communication network and to accurately discover the lack of a contact plug or the inadvertent foregetting of the closing of a case, by constituting the title detector so that the leakage spot is detected using a fine loop for detecting a leaked electromagnetic wave. CONSTITUTION:A small variable condenser 11 is connected to a fine loop 10 composed of a coil of several turns having a wire diameter of about 1mm and a diameter of about 1cm in parallel so as to be capable of being made synchronous to a VHF band and a UHF band. A signal is taken out from one terminal of the fine loop to be connected to a band-pass filter (BPF) 13 through a contact plug 12 and the output of the BPF 12 is connected to a mixer 15 through a high frequency amplifier 14. A local oscillator 16 is also connected to the mixer 15 and the signal from the high frequency amplifier 14 is converted to an intermediate frequency signal by the mixer 15. The output of the mixer 15 is connected to detector 18 through the intermediate frequency amplifier 17 and a display device 19 is operated by the output of said detector 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62177417A JPS6421371A (en) | 1987-07-16 | 1987-07-16 | Leakage spot detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62177417A JPS6421371A (en) | 1987-07-16 | 1987-07-16 | Leakage spot detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6421371A true JPS6421371A (en) | 1989-01-24 |
Family
ID=16030560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62177417A Pending JPS6421371A (en) | 1987-07-16 | 1987-07-16 | Leakage spot detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6421371A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001184584A (en) * | 1999-12-24 | 2001-07-06 | Ricoh Elemex Corp | Rfid reader/writer antenna positing device and meter having position indication seal or pointer stuck by the same device |
| JP2006279270A (en) * | 2005-03-28 | 2006-10-12 | Matsushita Electric Ind Co Ltd | Apparatus for detecting line state, communication apparatus, balanced transmission system, and method of detecting line state |
| JP2013031068A (en) * | 2011-07-29 | 2013-02-07 | Toshiba Tec Corp | Radio communication system |
| JP2020101475A (en) * | 2018-12-25 | 2020-07-02 | 日本放送協会 | Power measurement device |
-
1987
- 1987-07-16 JP JP62177417A patent/JPS6421371A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001184584A (en) * | 1999-12-24 | 2001-07-06 | Ricoh Elemex Corp | Rfid reader/writer antenna positing device and meter having position indication seal or pointer stuck by the same device |
| JP2006279270A (en) * | 2005-03-28 | 2006-10-12 | Matsushita Electric Ind Co Ltd | Apparatus for detecting line state, communication apparatus, balanced transmission system, and method of detecting line state |
| JP2013031068A (en) * | 2011-07-29 | 2013-02-07 | Toshiba Tec Corp | Radio communication system |
| JP2020101475A (en) * | 2018-12-25 | 2020-07-02 | 日本放送協会 | Power measurement device |
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