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Program A7·2.
Three-Port to Two·Port Conversion
See Equation (7.29) and Example 7.2.
Keys:
5 3 -->
a
+
b
I/Z
c
•
d
ZP(f,o)
RTNR/S
S"
D
S33
E
Note: Key e and RTN R/S are inverse functions.
Input: Press CLRG, P:::;S, CLRG; then press fa. When II appears, key in
0?1' t, /S\\/, R/S; do the same for 21, etc. After all nine complex
parameters are entered, save on a data card. Then input Z, in polar form:
0" t.IZ,I, and press key A.
Output: Press key B; see 0\\ and ISl1l two-port parameters. Keys B, C, D,
and E may be used in any order.
881 8 Start Zp(rsO) Calculation 831 P:S
882 EHTt 832 RCL5 1,221
883 I 93:; CHS Set up subtraction
1lS4 GSB. f+! 834 GSB. Cmplx addition
1lS5 SroD Sto magnitude 8'5 'SSe Invert
1lS6 X:)' 836 STD8 I(iff'-s22)-' 1
1lS7 STOE Sto degrees 837 P:S
IlS8 X:Y 838 X:'J
1lS9 CHS Set up subtraction 83'9 STlHl (1/fZ-s22)-1 degrees
818 8 -P:S
811 EHTf 841 x:y
812 2 842 RTH End calc with Z2
813 G58. l-f 843 .l8l2 Start stnd sequence calc
814 GS8, Invert 844 STOI Store sequence
815 RClE 845 P:S
'16 RCLD l+r 846 Rel8 See step 039
811 GSBd Cmplx multiplication 847 P:S
818 5 84B RCl8 See step 036
819 8 849 GS88 Rei digit 1 data
828 • Z scale 858 G58. Polar multiply
821 R/S End Zp(r) Calculation 851 GSBB ReI digit 2 data
822 'LOLA Start Calc with Z, 852 GS8. Polar multiply
823 GSSe Calc f2 from Z2 853 GSB8 Rei digit 3 data
824 EEX 8S4 GSBO Polar addition
825 CHS 855 x:r
926 9 1156 PRTX Print degrees
827 + Avoid divide by zero 857 X;Y
828 'SSc [If' 858 PRTK Print magnitude
829 P:S 859 RTN End standard calculation
838 RCL5 522 degrees
399