Pub Date : 1972-11-01DOI: 10.1109/TBTR1.1972.299676
E. Breeze
A system has been proposed for the transmission of accurate time information during Line 21 of the vertical interval of standard television broadcasts. This paper will desctibe the basic system and its implementation in an approach to digital tuning. Many uses have been suggested for the vertical interval , including test signals, facsimile, etc. The National Bureau of Standards proposes using one of the lines for transmission of digitally encoded time information. The line chosen was originally line 1 but this was subsequently changed to line 21 due to the line 1 bypass used in broadcast processors. The information contained in the code would include -NBS time, local time, channel identification, 64 characters of text and a precise 1 MHz reference signal. The text is intended for deaf viewers, emergency codes, subtitles, network communications, etc.
{"title":"Television Line 21 Encoded Information and its Impact on Receiver Design","authors":"E. Breeze","doi":"10.1109/TBTR1.1972.299676","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299676","url":null,"abstract":"A system has been proposed for the transmission of accurate time information during Line 21 of the vertical interval of standard television broadcasts. This paper will desctibe the basic system and its implementation in an approach to digital tuning. Many uses have been suggested for the vertical interval , including test signals, facsimile, etc. The National Bureau of Standards proposes using one of the lines for transmission of digitally encoded time information. The line chosen was originally line 1 but this was subsequently changed to line 21 due to the line 1 bypass used in broadcast processors. The information contained in the code would include -NBS time, local time, channel identification, 64 characters of text and a precise 1 MHz reference signal. The text is intended for deaf viewers, emergency codes, subtitles, network communications, etc.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114419049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-11-01DOI: 10.1109/TBTR1.1972.299660
E. Close, A. Kelsch
A digital tuning indicator for a multiple band heterodyne type receiving device is disclosed which is capable of displaying the frequency to which the receiving device is tuned for AM and FM reception in kilohertz to the nearest kilohertz and in megahertz to the nearest one-tenth megahertz respectively, and of displaying the channel to which the device is tuned when receiving UHF television. The indicating system comprises a counter, the contents of which are periodically displayed. The counter contents are preset to a value which reflects the intermediate frequency of the particular band and a submultiple of the corresponding local oscillator frequency is gated into the counter for a prescribed time interval whereby the resultant sum in the counter at the end of the prescribed time interval reflects the actual received frequency or the corresponding channel number.
{"title":"A Digital Tuning Indicator","authors":"E. Close, A. Kelsch","doi":"10.1109/TBTR1.1972.299660","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299660","url":null,"abstract":"A digital tuning indicator for a multiple band heterodyne type receiving device is disclosed which is capable of displaying the frequency to which the receiving device is tuned for AM and FM reception in kilohertz to the nearest kilohertz and in megahertz to the nearest one-tenth megahertz respectively, and of displaying the channel to which the device is tuned when receiving UHF television. The indicating system comprises a counter, the contents of which are periodically displayed. The counter contents are preset to a value which reflects the intermediate frequency of the particular band and a submultiple of the corresponding local oscillator frequency is gated into the counter for a prescribed time interval whereby the resultant sum in the counter at the end of the prescribed time interval reflects the actual received frequency or the corresponding channel number.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129632201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299671
S. Makino, Koichi Sakuma, H. Tajiri
Recent advent of varactor diode tuners has stimulated TV engineers to devise novel electronic channel selecors. The authors have developed a fully integrated channel selection system using only two IC's; one p-channel MOS LSI for channel selection and one bipolar IC for voltage selection.
{"title":"An Integrated Channel Selection System","authors":"S. Makino, Koichi Sakuma, H. Tajiri","doi":"10.1109/TBTR1.1972.299671","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299671","url":null,"abstract":"Recent advent of varactor diode tuners has stimulated TV engineers to devise novel electronic channel selecors. The authors have developed a fully integrated channel selection system using only two IC's; one p-channel MOS LSI for channel selection and one bipolar IC for voltage selection.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130877819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299670
H. A. Gill
An internally compensated low noise stereo preamplifier has been designed for consumer applications. It is characterized by 106 dB open loop gain, 76 dB S/N ratio (R1AA) and 0. 1% distortion when supplying 9Vrms to a 2K?load using a 30V supply.
{"title":"An Internally Compensated Low Noise Monolithic Stereo Preamplifier","authors":"H. A. Gill","doi":"10.1109/TBTR1.1972.299670","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299670","url":null,"abstract":"An internally compensated low noise stereo preamplifier has been designed for consumer applications. It is characterized by 106 dB open loop gain, 76 dB S/N ratio (R1AA) and 0. 1% distortion when supplying 9Vrms to a 2K?load using a 30V supply.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127463626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299639
W. C. Morrison
{"title":"Product Safety Through Governmental Intervention","authors":"W. C. Morrison","doi":"10.1109/TBTR1.1972.299639","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299639","url":null,"abstract":"","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128643367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299664
Ian B. Mertes
Of the numerous functions required of the IF amplifier in a modern television receiver, selectivity is undoubtedly the most difficult to achieve. Operating parameters such as gain, stability, linearity, signal-handling ability, voltage output and gain-reduction capability are achieved by rather straightforward means of design. Selectivity requirements are severe, calling for placement of several specific frequencies with close tolerance within the passband of the amplifier while simultaneously attempting to reject frequencies extremely close to the edges of the desired passband. In color television receivers, the problem is especially compounded because results depend on maintenance of low phase distortion between the 6 dB points of the response curve. The new bandpass-filter IF amplifier efficiently handles these problems and helps produce a high quality picture even from a low quality signal.
{"title":"Application of Bandpass Filters to Color TV IF Amplifiers","authors":"Ian B. Mertes","doi":"10.1109/TBTR1.1972.299664","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299664","url":null,"abstract":"Of the numerous functions required of the IF amplifier in a modern television receiver, selectivity is undoubtedly the most difficult to achieve. Operating parameters such as gain, stability, linearity, signal-handling ability, voltage output and gain-reduction capability are achieved by rather straightforward means of design. Selectivity requirements are severe, calling for placement of several specific frequencies with close tolerance within the passband of the amplifier while simultaneously attempting to reject frequencies extremely close to the edges of the desired passband. In color television receivers, the problem is especially compounded because results depend on maintenance of low phase distortion between the 6 dB points of the response curve. The new bandpass-filter IF amplifier efficiently handles these problems and helps produce a high quality picture even from a low quality signal.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123856258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299640
Robert B. Johnson, Eugene H. Campbell
{"title":"A Broadcast Quality TV Sync Generator Made Economical Through L.S.I.","authors":"Robert B. Johnson, Eugene H. Campbell","doi":"10.1109/TBTR1.1972.299640","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299640","url":null,"abstract":"","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130039510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299665
E. Schatter
TBA 440 resembles a sensitive IF amplifier, a double balanced detector and an AGC system for IF and RF with adjustable threshold and tuner delay in a comon 16 lead DIP-case. The IF-amplifier is dc-coupled from input to the video outputs and gain controlled in two stages by variable emitter-degeneration. Thus the number of external components could be minimized. The circuit offers excellent large signal capability and low noise level over the whole AGC-range. The dc-level of the video outputs and of the AGC threshold are temperature compensated.
{"title":"Monolithic TV IF System TBA 440","authors":"E. Schatter","doi":"10.1109/TBTR1.1972.299665","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299665","url":null,"abstract":"TBA 440 resembles a sensitive IF amplifier, a double balanced detector and an AGC system for IF and RF with adjustable threshold and tuner delay in a comon 16 lead DIP-case. The IF-amplifier is dc-coupled from input to the video outputs and gain controlled in two stages by variable emitter-degeneration. Thus the number of external components could be minimized. The circuit offers excellent large signal capability and low noise level over the whole AGC-range. The dc-level of the video outputs and of the AGC threshold are temperature compensated.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121881529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299663
Gordon F. Rogers
The usual method of determining impulse noise susceptibility is to feed various levels of noise from the motor in an electric shaver, electric eraser or electric drill to the antenna leads of a TV receiver and observe the effect upon the picture. The designer then attempts to determine what section of the TV receiver is being affected by the noise. This rather unknown level and type of noise is difficult to reproduce for comparison of various receiver designs. The method here proposed to test the receiver provides a known level of noise to test for horizontal and vertical sync stability, AGC set up, and white streaking.
{"title":"Methods of Measurement of Impulse Noise Susceptibility of TV Receiver","authors":"Gordon F. Rogers","doi":"10.1109/TBTR1.1972.299663","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299663","url":null,"abstract":"The usual method of determining impulse noise susceptibility is to feed various levels of noise from the motor in an electric shaver, electric eraser or electric drill to the antenna leads of a TV receiver and observe the effect upon the picture. The designer then attempts to determine what section of the TV receiver is being affected by the noise. This rather unknown level and type of noise is difficult to reproduce for comparison of various receiver designs. The method here proposed to test the receiver provides a known level of noise to test for horizontal and vertical sync stability, AGC set up, and white streaking.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133080928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-08-01DOI: 10.1109/TBTR1.1972.299668
Wilfred L. Hand
Recent developments in the CATV industry have made it imperative that the Broadcast Television Receiver Manufacturing Industry take a hard look at its product and the CATV interface requirements. The growth of this new mar-ket certainly will be dependent on the TV Receiver Manufacturing Industry and how it responds to these interface requirements. The real question is whether the CATV Industry will grow "because" of the Receiver Manufacturers response or "in spite of it".
{"title":"Television Receiver Requirements for CATV Systems","authors":"Wilfred L. Hand","doi":"10.1109/TBTR1.1972.299668","DOIUrl":"https://doi.org/10.1109/TBTR1.1972.299668","url":null,"abstract":"Recent developments in the CATV industry have made it imperative that the Broadcast Television Receiver Manufacturing Industry take a hard look at its product and the CATV interface requirements. The growth of this new mar-ket certainly will be dependent on the TV Receiver Manufacturing Industry and how it responds to these interface requirements. The real question is whether the CATV Industry will grow \"because\" of the Receiver Manufacturers response or \"in spite of it\".","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1972-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129624830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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