JPS5542430A - Automatic channel selection device - Google Patents
Automatic channel selection deviceInfo
- Publication number
- JPS5542430A JPS5542430A JP11537678A JP11537678A JPS5542430A JP S5542430 A JPS5542430 A JP S5542430A JP 11537678 A JP11537678 A JP 11537678A JP 11537678 A JP11537678 A JP 11537678A JP S5542430 A JPS5542430 A JP S5542430A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- carrier frequency
- counter
- detection output
- sweep
- 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
Abstract
PURPOSE: To avoid the malfunction in an assured way by introducing the video detection output to the sweep control circuit, detecting the best signal between the video carrier frequency of the upper channel and the aural carrier frequency of the lower side and then continuing the sweep while the detection output exists.
CONSTITUTION: The clock pulse given from clock pulse generating circuit 12 is supplied to counter 11 via AND circuit 13, and the start/stop of counter 11 is controlled by FF14. Then the counter output receives D-A conversion 16 and is then applied to tuner 1 as the preset voltage. On the other hand, the AFT output given from AFT circuit 17 is sent to formation circuit 18, where the AFT command pulse is formed in accordance with the reception pulse to control counter 11. Then the video detection output is led to sweep control circuit 20 to detect the beat signal between the video carrier frequency of the upper channel and the aural carrier frequency of the lower channel. And the sweep is continued while the detection output exists, thus avoiding the malfunction assuredly.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11537678A JPS5542430A (en) | 1978-09-20 | 1978-09-20 | Automatic channel selection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11537678A JPS5542430A (en) | 1978-09-20 | 1978-09-20 | Automatic channel selection device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5542430A true JPS5542430A (en) | 1980-03-25 |
Family
ID=14660986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11537678A Pending JPS5542430A (en) | 1978-09-20 | 1978-09-20 | Automatic channel selection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5542430A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58521U (en) * | 1981-06-26 | 1983-01-05 | クラリオン株式会社 | Receiving machine |
-
1978
- 1978-09-20 JP JP11537678A patent/JPS5542430A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58521U (en) * | 1981-06-26 | 1983-01-05 | クラリオン株式会社 | Receiving machine |
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