DOI:10.1049/ree.1971.0050

出版商:IERE    

年代:1971

数据来源: IET

DOI:10.1049/ree.1971.0051

出版商:IERE    

年代:1971

数据来源: IET

DOI:10.1049/ree.1971.0052

出版商:IERE    

年代:1971

数据来源: IET

摘要:

A theoretical study is presented on the noise affecting the automatic television measurements carried out by test signals in the field blanking interval (insertion test signals). On the basis of the results it is shown that special signals (national test signals) can be used, for automatic measurements, instead of the international signals and the measurement devices are defined so as to obtain measurements affected as little as possible by noise.

DOI:10.1049/ree.1971.0053

出版商:IERE    

年代:1971

数据来源: IET

摘要:

In vacuum co-deposition of thin cermet resistor films it has been found that the electrical properties are sensitive to deposition rates, thus needing a two-channel rate controller. The requirements of such an instrument are outlined and alternative systems are briefly compared, resulting in the choice of a digital data processor and step feedback control. A detailed description of the logic and circuit design of the instrument built is presented along with a brief discussion of the operational limitations and difficulties. Possible extensions of the instrument to other needs are considered.

DOI:10.1049/ree.1971.0054

出版商:IERE    

年代:1971

数据来源: IET

摘要:

The stability and bandwidth characteristics of a mode control amplifier can be substantially improved by addition of a resistor in series with computing capacitor. It is shown that the effects of such a modification of the feedback path configuration on computing accuracy can easily be balanced out.

DOI:10.1049/ree.1971.0055

出版商:IERE    

年代:1971

数据来源: IET

摘要:

The exposure of a camera tube to a brief flash of light and the measurement of the magnitude of the signal current after a known number of television fields can provide an indication of the speed of response of the tube to changing light levels. A meter which permits accurate lag measurements, in the presence of noise, to within an accuracy of ±0.1% of white level is described and its performance is discussed.

DOI:10.1049/ree.1971.0056

出版商:IERE    

年代:1971

数据来源: IET

DOI:10.1049/ree.1971.0057

出版商:IERE    

年代:1971

数据来源: IET

摘要:

This paper discusses the advantages to be obtained from insertion test signal techniques. Consideration is given to the types of distortion which need to be measured and the consequent requirements of the test signal waveform. Methods of measurement are discussed and typical results obtained in practice are shown. Probable accuracy of measurement is considered and the paper concludes with a suggestion of some possible future developments.

DOI:10.1049/ree.1971.0058

出版商:IERE    

年代:1971

数据来源: IET