JPS55143448A - Selective level measuring instrument - Google Patents
Selective level measuring instrumentInfo
- Publication number
- JPS55143448A JPS55143448A JP12587778A JP12587778A JPS55143448A JP S55143448 A JPS55143448 A JP S55143448A JP 12587778 A JP12587778 A JP 12587778A JP 12587778 A JP12587778 A JP 12587778A JP S55143448 A JPS55143448 A JP S55143448A
- Authority
- JP
- Japan
- Prior art keywords
- variable oscillator
- output
- band
- measuring instrument
- level measuring
- 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 measure the level of an input signal covering a broad band by acquiring it stably by dividing a receiving frequency band into the high and low frequency bands and by using a LC variable oscillator and crystal variable oscillator as local oscillators.
CONSTITUTION: Switch 13 is switched, for example, manually to supply mixer 3 with the output of LC variable oscillator 11 when an input signal on the high frequency range side is acquired or with the output of crystal variable oscillator 12 when that on the lower side is acquired. The output of mixer 3 is supplied to indicating instrument 7 by way of band-pass filter 5 and amplifying detector 6, thereby indicating its level.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12587778A JPS55143448A (en) | 1978-10-13 | 1978-10-13 | Selective level measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12587778A JPS55143448A (en) | 1978-10-13 | 1978-10-13 | Selective level measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55143448A true JPS55143448A (en) | 1980-11-08 |
Family
ID=14921126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12587778A Pending JPS55143448A (en) | 1978-10-13 | 1978-10-13 | Selective level measuring instrument |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55143448A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007508534A (en) * | 2003-10-08 | 2007-04-05 | サントル ナシオナル デチュード スパシアル | Magnetic field measuring device |
JP2008309554A (en) * | 2007-06-13 | 2008-12-25 | Nippon Telegr & Teleph Corp <Ntt> | Leakage electromagnetic wave receiving device and leakage electromagnetic wave receiving method |
-
1978
- 1978-10-13 JP JP12587778A patent/JPS55143448A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007508534A (en) * | 2003-10-08 | 2007-04-05 | サントル ナシオナル デチュード スパシアル | Magnetic field measuring device |
JP4718472B2 (en) * | 2003-10-08 | 2011-07-06 | サントル ナシオナル デチュード スパシアル | Magnetic field measuring device |
JP2008309554A (en) * | 2007-06-13 | 2008-12-25 | Nippon Telegr & Teleph Corp <Ntt> | Leakage electromagnetic wave receiving device and leakage electromagnetic wave receiving method |
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