JPS5234609A - Multifrequency signal receiving system - Google Patents
Multifrequency signal receiving systemInfo
- Publication number
- JPS5234609A JPS5234609A JP50094574A JP9457475A JPS5234609A JP S5234609 A JPS5234609 A JP S5234609A JP 50094574 A JP50094574 A JP 50094574A JP 9457475 A JP9457475 A JP 9457475A JP S5234609 A JPS5234609 A JP S5234609A
- Authority
- JP
- Japan
- Prior art keywords
- signal receiving
- receiving system
- multifrequency signal
- multifrequency
- different
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:In case the working level of frequency isolation filter is different against the input signal composed of different frequency and the adjacent band wave is output with leakage, the malfunction of multifrequency signal receiving equipment can be effectively prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50094574A JPS5234609A (en) | 1975-08-01 | 1975-08-01 | Multifrequency signal receiving system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50094574A JPS5234609A (en) | 1975-08-01 | 1975-08-01 | Multifrequency signal receiving system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5234609A true JPS5234609A (en) | 1977-03-16 |
Family
ID=14114056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50094574A Pending JPS5234609A (en) | 1975-08-01 | 1975-08-01 | Multifrequency signal receiving system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5234609A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
-
1975
- 1975-08-01 JP JP50094574A patent/JPS5234609A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
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