ISSN:
1573-8906
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
Notes:
Conclusions 1. Specific characteristics v1, Q1 and P1 provide a tight evaluation of the equipment. Even when they are relatively small as, for instance, in the case of equipment APMZ-ChM (see Table 2) the quality factor and the quality index can be relatively low, indicating that the design of the equipment is not sufficiently efficient. 2. The suggested quality index characterizes the equipment more completely than the quality factor. A rising K for approximately the same values of Kq (Table 2, lines 1 and 3) indicates greater potentialities of the equipment (in this case greater sensitivity), and also that the volume, weight and power consumption in one of the two similar-type specimens are utilized more efficiently. 3. In order to raise the values of K and Kq and to obtain a more efficient design for the recording equipment it is advisable to raise to the maximum the longitudinal and transverse recording densities (extend the spectrum of the recorded frequencies, reduce the speed of the magnetic tape, and increase the number of channels) up to values which are limited by the reduction in the signal-to-noise ratio. 4. Economic factors play an important part in determining the quality of the equipment. Therefore, it is advisable to use all the means which lower the total consumption of the recording equipment (transistors, efficient supply conditions, economical tape-propelling mechanisms, etc.). 5. The suggested criterion for evaluating the efficiency of the equipment design is not all embracing. For a comprehensive evaluation of the design efficiency it is advisable also to take into consideration the reliability, temperature range, simplicity of the design, manufacturing technology and servicing of the equipment, etc. The suggested values of coefficients K and Kq are very approximate and apparently can be made more precise as more models of the equipment are produced.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00988160
Permalink