THEORETICAL FU.NDAMENTALS OF I'ULSE TRANSMISSION 1001 



The margin for a unit dilference A^ax — -Imi,, , i-c. Mi = M/(A, 

 ■ -I mill) becomes: 



1 — M 



(14.08) 



The s{)ec'ial case of an ideal transmission characteristic as sliown in 

 Fig. 47 will be considered first. In this case 



72(0) = 1 R{2t) = R{-2t) = 



R{4.t) = A'(-4r) = 



Qir) = 0.5 Q(-r) = -0.5 

 (KSt) = Q(-3t) = 



so that: 



1:^+ = X^~ = 



Z^"" = 0.5 DQ- = 0.5 

 Equation (14.08) in this case simplifies to 



Ml 



1 - 



1 - 



m' + ^ (1 - m)' 



ni/2 



(14.09) 



For various values of |U = ^4niinA'lmax the margin for luiit (hffer 



ence m 



ENVELOPE Pit) 



Fig. 47 — Envelope of idealized impulse characteristic. 



