Pub Date : 1962-11-01DOI: 10.1109/TBTR2.1962.4503242
Robert F. Tschannen, E. J. Duffy
Complete performance tests of a color TV receiver may require several man-weeks of testing time when using conventional test methods, such as those specified in Hazeltine Report 8020. A large time saving can be made by the use of two newly developed equipments to measure a number of the more important characteristics of the chrominance and luminance channels of a receiver. The purpose of the present report is to describe these two equipments, their operation, and uses.
{"title":"Equipment and Techniques for Simplified Testing of Color TV Receivers","authors":"Robert F. Tschannen, E. J. Duffy","doi":"10.1109/TBTR2.1962.4503242","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503242","url":null,"abstract":"Complete performance tests of a color TV receiver may require several man-weeks of testing time when using conventional test methods, such as those specified in Hazeltine Report 8020. A large time saving can be made by the use of two newly developed equipments to measure a number of the more important characteristics of the chrominance and luminance channels of a receiver. The purpose of the present report is to describe these two equipments, their operation, and uses.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117224214","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503247
D. E. Sparks
{"title":"On the Formal Equivalence of Tubes and Transistors","authors":"D. E. Sparks","doi":"10.1109/TBTR2.1962.4503247","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503247","url":null,"abstract":"","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123046774","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503239
S. Ronzheimer
This report begins with a brief discussion of the problems encountered when an attempt is made to utilize fully the dc component of the television signal in a typical receiver. The past compromise solution of using only a fractional part of the dc component is discussed and the resultant disadvantages are described. A new approach, involving the new concept of the dc/ac coupling, is then presented. It is shown that good black-level stabilization is most important for scenes of low average brightness; this is fortunate because it allows compromise with high-brightness scenes to avoid overload of the high-voltage power supply. The new coupling circuit is simple and provides a combination of dc and ac coupling, dc coupling for low-brightness scenes, and ac coupling, with its accompanying protection against overload, for high-brightness scenes.
{"title":"A New Approach to the DC-Restoration Problem","authors":"S. Ronzheimer","doi":"10.1109/TBTR2.1962.4503239","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503239","url":null,"abstract":"This report begins with a brief discussion of the problems encountered when an attempt is made to utilize fully the dc component of the television signal in a typical receiver. The past compromise solution of using only a fractional part of the dc component is discussed and the resultant disadvantages are described. A new approach, involving the new concept of the dc/ac coupling, is then presented. It is shown that good black-level stabilization is most important for scenes of low average brightness; this is fortunate because it allows compromise with high-brightness scenes to avoid overload of the high-voltage power supply. The new coupling circuit is simple and provides a combination of dc and ac coupling, dc coupling for low-brightness scenes, and ac coupling, with its accompanying protection against overload, for high-brightness scenes.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131979550","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503243
S. Lapin
The coverage of TV stations, which is determined by power output, Antenna height, terrain, and frequency, can be extended through use of the which translates the frequency of the signal and amplifies it. This is particularly important in the case of UHF stations whose coverage is more severely limited by such factors as terrain and distance. The use of the translator allows coverage of important ``Holes'' (uncovered areas) in a station's coverage pattern. These devices operate unattended at retransmitting points, and do not change the technical characteristics of the television signal, expect for frequency. In most situations, they supply a better answer to coverage problems than merely increasing station power.
{"title":"UHF Translators for Expanding Television Coverage","authors":"S. Lapin","doi":"10.1109/TBTR2.1962.4503243","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503243","url":null,"abstract":"The coverage of TV stations, which is determined by power output, Antenna height, terrain, and frequency, can be extended through use of the which translates the frequency of the signal and amplifies it. This is particularly important in the case of UHF stations whose coverage is more severely limited by such factors as terrain and distance. The use of the translator allows coverage of important ``Holes'' (uncovered areas) in a station's coverage pattern. These devices operate unattended at retransmitting points, and do not change the technical characteristics of the television signal, expect for frequency. In most situations, they supply a better answer to coverage problems than merely increasing station power.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134504481","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503244
P. C. Manson, M. Stavin
The design of an FM-AM receiver poses a variety of problems peculiar to the automobile environment. Techniques relating to AM performance are well known and will not be covered in this paper except where FM and AM circuitry are common or possibility of interference exists. The FM problems encountered are those concerned with the design of any good quality FM receiver plus those associated with satisfactory performance under greatly varying signal conditions: ambient temperature ranges of -20°F to +140°F and impulsive interference from the automobile in which the receiver is installed, other automobiles, and other sources of noise.
{"title":"A High Performance FM-AM Automobile Receiver","authors":"P. C. Manson, M. Stavin","doi":"10.1109/TBTR2.1962.4503244","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503244","url":null,"abstract":"The design of an FM-AM receiver poses a variety of problems peculiar to the automobile environment. Techniques relating to AM performance are well known and will not be covered in this paper except where FM and AM circuitry are common or possibility of interference exists. The FM problems encountered are those concerned with the design of any good quality FM receiver plus those associated with satisfactory performance under greatly varying signal conditions: ambient temperature ranges of -20°F to +140°F and impulsive interference from the automobile in which the receiver is installed, other automobiles, and other sources of noise.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130085466","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503246
C. D. Simmons, J. Specialny
This report compares the cross modulation of transistors and tubes in a HF tuner. The results substantiate the theory developed by several authors and indicate that transistors are about 1 1/2 to 2 times worse than tubes. However, it is shown that by using small degenerative emitter resistors, the transistor can be made as good as the best tubes. In fact, by using a 56 ohm unbypassed emitter resistor and forward AGC the cross modulation of a T-2028 MADT is equal or better than the best tube tuners over the entire AGC range.
{"title":"Cross Modulation in Transistor Tuners","authors":"C. D. Simmons, J. Specialny","doi":"10.1109/TBTR2.1962.4503246","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503246","url":null,"abstract":"This report compares the cross modulation of transistors and tubes in a HF tuner. The results substantiate the theory developed by several authors and indicate that transistors are about 1 1/2 to 2 times worse than tubes. However, it is shown that by using small degenerative emitter resistors, the transistor can be made as good as the best tubes. In fact, by using a 56 ohm unbypassed emitter resistor and forward AGC the cross modulation of a T-2028 MADT is equal or better than the best tube tuners over the entire AGC range.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125919225","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503240
S. Gertzis, Robrecht Bosselaers
{"title":"Characterization of RF Transistors For AM/FM Radio Applications","authors":"S. Gertzis, Robrecht Bosselaers","doi":"10.1109/TBTR2.1962.4503240","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503240","url":null,"abstract":"","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115692217","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503238
J. Deitz
The report deals with that portion of the Commission's UHF Project that was concerned with the installation of observation receivers at 768 randomly selected locations within 25 miles of the Empire State Building. All of the television signals observed originated at this site.
{"title":"Report on Receiver Installations","authors":"J. Deitz","doi":"10.1109/TBTR2.1962.4503238","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503238","url":null,"abstract":"The report deals with that portion of the Commission's UHF Project that was concerned with the installation of observation receivers at 768 randomly selected locations within 25 miles of the Empire State Building. All of the television signals observed originated at this site.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122399103","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503241
W. L. Hughes
{"title":"Surveys of Adjacent Channel Interference in VHF Television","authors":"W. L. Hughes","doi":"10.1109/TBTR2.1962.4503241","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503241","url":null,"abstract":"","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127316583","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 : 1962-11-01DOI: 10.1109/TBTR2.1962.4503251
M. E. Ulug
A special pentode tube for broad band intermediate frequency amplifier application is designed with the purpose of eliminating cathode degeneration while maintaining the capability to control the gain. The amplification of the stage is further increased by utilizing the space charge coupling between the plate current and suppressor grid. The circuits are developed to move the poles of the amplifier and vary the bandwidth in a predetermined manner. The new tube, which can be used either as a sharp cut off or remote cut off pentode, is completely free of run away effects due to gas or grid emission, and because of its inherent characteristics, the clipping of the modulation from the signal cannot occur. As a result of this development, it is now possible to eliminate one of the three stages of video intermediate frequency amplifiers presently used in black and white television sets without loss of performance.
{"title":"Novel tube and circuit designs for automatic gain controlled broad band intermediate frequency amplifiers","authors":"M. E. Ulug","doi":"10.1109/TBTR2.1962.4503251","DOIUrl":"https://doi.org/10.1109/TBTR2.1962.4503251","url":null,"abstract":"A special pentode tube for broad band intermediate frequency amplifier application is designed with the purpose of eliminating cathode degeneration while maintaining the capability to control the gain. The amplification of the stage is further increased by utilizing the space charge coupling between the plate current and suppressor grid. The circuits are developed to move the poles of the amplifier and vary the bandwidth in a predetermined manner. The new tube, which can be used either as a sharp cut off or remote cut off pentode, is completely free of run away effects due to gas or grid emission, and because of its inherent characteristics, the clipping of the modulation from the signal cannot occur. As a result of this development, it is now possible to eliminate one of the three stages of video intermediate frequency amplifiers presently used in black and white television sets without loss of performance.","PeriodicalId":136909,"journal":{"name":"Ire Transactions on Broadcast and Television Receivers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1962-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129474675","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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