508 BELL SYSTEM TECHNICAL JOURNAL 



APPENDIX II 



As in the case of Appendix I, the calculation of Yi{m, n) • Fo(m', n') 

 is a straightforward mathematical procedure which will not be repro- 

 duced. The results are again presented in the form of charts. 



In these charts the intensities of the principal extraneous components 

 are indicated by solid lines, while the higher order extraneous com- 

 ponents are indicated by dotted lines. The normal components have 

 been indicated by dashed lines. 



It should be explained that what has really been plotted is Fi(m, n) 

 • Y<i{m, n') rather than Yi{m, n) • F2(m', n'). This is because the 

 difference between m' and m, when multiplied by the parameters 

 chosen for the charts, varies with the proportions of the scanning system 

 used. As discussed in the text with regard to Fig. 17, however, this 

 difference between m' and m has a negligible effect for any system em- 

 ploying a useful number of scanning lines. 



