JPS54144101A - Inspection unit for fine adjustment range such as tv tuner - Google Patents

Inspection unit for fine adjustment range such as tv tuner

Info

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
Application number
JP5299078A
Other languages
Japanese (ja)
Inventor
Shoji Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YAMAGUCHI SANYO KOGYO KK
YAMAGUCHI SANYOU KOUGIYOU KK
Sanyo Electric Co Ltd
Original Assignee
YAMAGUCHI SANYO KOGYO KK
YAMAGUCHI SANYOU KOUGIYOU KK
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by YAMAGUCHI SANYO KOGYO KK, YAMAGUCHI SANYOU KOUGIYOU KK, Sanyo Electric Co Ltd filed Critical YAMAGUCHI SANYO KOGYO KK
Priority to JP5299078A priority Critical patent/JPS54144101A/en
Publication of JPS54144101A publication Critical patent/JPS54144101A/en
Pending legal-status Critical Current

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
JP5299078A 1978-04-28 1978-04-28 Inspection unit for fine adjustment range such as tv tuner Pending JPS54144101A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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