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Program A9-1.
See Section 9.1.l.
Keys:
Equal-AdmIttance-Stub Filters
PN(N,y)
a
LdB
b
N, K--? f I ,f2--? f l ,f2->
See fo See w
A B C
W->
See q
o
f/f o ->
See q
E
Example: Input 4, t, 1.4, and press key A. Input 400, t, 1400, and press key
B; see f o =900. Press R/S; see 20.376 dB. Or, after key A, input 400, t,
1400, and press key C; see w= 1.111. Press R/S and see 20.376 dB. Or,
after key A, input 1.l11 and press key D; see q = 0.766. Press R/S and
see 20.372 dB. Or, after key A, input 1400, t, 900, ..-, and press key E;
see q=0.766. Press R/S and see 20.376 dB.
981 ,LBLR Input N, K 831 ~L8LO Calc q from '"
.02 ST02 K .32 STOi' w
003 X:'r 033 2
984 5101 N 834
..,
••5 X:\' 835 1
996 OIN End 836 X:'r'
.LbL8 Calc fO & Other Params 83,:' - 088 GSa! Calculate parameters .38 f/£0=I-w/2
tLBtE Calc q
089 RCL6 fO
&39 9
from fifO
816 f(/S Stop (restart with R!S) 840 8
.ll GTOt:· To calc L dB 041 ,
812 ,LBLC Calc w & Other Params B42 COS
813 (;S81 Calculate parameters 843 ASS
.14 RCL7' w .44 Sr03 q
IH5 R/5 Stop (restart with R/S) .45 ~TN End
016 GTOh To calc L dB 846 *LBL~ Calculate L dB from (9.18)
817 .HILl Calc All Parameters 847 RtL2 K
818 5T05 £2 848 2
819 X:Y 849
820 5104 f1 858 1
821 + 85J +
822 2 852 RCL3 q
823 " {453 >
824 $T06 Store fa in R6 854 2
625 RCL5 £2 855 x
it26 RCl4 £1 856 RCLJ N
827 857 X:V
82. A". 85. CSBo. PN
929 RCL6 fO
859 RCLJ q
.38 " ~ 86. x
415