JPS54144101A - Inspection unit for fine adjustment range such as tv tuner - Google Patents
Inspection unit for fine adjustment range such as tv tunerInfo
- Publication number
- JPS54144101A JPS54144101A JP5299078A JP5299078A JPS54144101A JP S54144101 A JPS54144101 A JP S54144101A JP 5299078 A JP5299078 A JP 5299078A JP 5299078 A JP5299078 A JP 5299078A JP S54144101 A JPS54144101 A JP S54144101A
- Authority
- JP
- Japan
- Prior art keywords
- fine tuning
- frequency
- tuner
- range
- lower limit
- 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 execute the inspection of the range of fine tuning of tuner with good efficiency and with sufficient accuracy, by detecting whether the counter output is within a desired value or not to the upper and lower limit of fine tuning by taking the local oscillation center frequency.
CONSTITUTION: The reference frequency BCD generation circuit 3 generates the BCD signal corresponding to the local oscillation center frequency fo of each channel to be inspected, the comparator 4 inputs the output of the circuit 3 and that of the counter 2, and when the counter output exceeds the upper limit of the required fine tuning frequency fOH of the required fine tuning frequency by taking the frequency fo as the center, the BCD signal corresponding to OVER is outputted, when between the upper and lower limit frequencies fOH anf fOL, that corresponding to NOGO, and when lower than the fOL, that corresponding to UNDER is outputted. Three outputs are converted at the control signal generation circuit 5, and control 5 is made to drive the channel selection unit 6 and the fine tuning control unit 7 individually. Thus, whether the counter output is within a desired value or not to the range of upper and lower limit of the fine tuning is detected, allowing the inspection of the range of tuner fine tuning to perform with good efficiency and sufficient accuracy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5299078A JPS54144101A (en) | 1978-04-28 | 1978-04-28 | Inspection unit for fine adjustment range such as tv tuner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5299078A JPS54144101A (en) | 1978-04-28 | 1978-04-28 | Inspection unit for fine adjustment range such as tv tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54144101A true JPS54144101A (en) | 1979-11-10 |
Family
ID=12930350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5299078A Pending JPS54144101A (en) | 1978-04-28 | 1978-04-28 | Inspection unit for fine adjustment range such as tv tuner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54144101A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57192479U (en) * | 1981-05-29 | 1982-12-06 | ||
US7187260B2 (en) | 2000-10-30 | 2007-03-06 | Mitsubishi Denki Kabushiki Kaisha | Electromagnetic device with cover for prevention of damage to conductor of electromagnetic device |
-
1978
- 1978-04-28 JP JP5299078A patent/JPS54144101A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57192479U (en) * | 1981-05-29 | 1982-12-06 | ||
US7187260B2 (en) | 2000-10-30 | 2007-03-06 | Mitsubishi Denki Kabushiki Kaisha | Electromagnetic device with cover for prevention of damage to conductor of electromagnetic device |
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