The Museum of HP Calculators

Butterworth and Chebyshev Filter Group Delay for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HP-67 Filters Solution Book. This program was entered and uploaded by Tony Duell.

This program is supplied without representation or warranty of any kind. Tony Duell, Hewlett Packard and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Documentation Information (CD or source code)
How to get this Program to your Calculator (via HP-IL, disk, wand, and fingers)
Download Binary (.raw) program for disk or PC HP-IL Card download
Download Hexadecimal (.dat) program for Serial Port download

Program Listing

LINE  KEYS
 01 LBL "BCGRPD"
 02 LBL 10
 03 LBL A
 04 STO 01
 05 STO 25
 06 0
 07 STO 07
 08 RCL 01
 09 RTN
 10 LBL 11
 11 LBL B
 12 STO 02
 13 RTN
 14 LBL 12
 15 LBL C
 16 STO 03
 17 RTN
 18 LBL 13
 19 LBL D
 20 STO 04
 21 RTN
 22 LBL 14
 23 LBL E
 24 RCL 04
 25 RCL 03
 26 RCL 02
 27 *
 28 RCL 04
 29 /
 30 -
 31 RCL 03
 32 RCL 02
 33 -
 34 /
 35 ABS
 36 STO 06
 37 RCL 25
 38 2
 39 *
 40 RCL 01
 41 +
 42 1
 43 -
 44 RCL 01
 45 /
 46 90
 47 *
 48 STO 05
 49 COS
 50 CHS
 51 ENTER
 52 ENTER
 53 *
 54 RCL 06
 55 RCL 05
 56 SIN
 57 -
 58 ENTER
 59 *
 60 +
 61 /
 62 ST+ 07
 63 7DSZ
 64 GTO 14
 65 RCL 07
 66 2
 67 /
 68 PI
 69 /
 70 RCL 03
 71 RCL 02
 72 -
 73 /
 74 RCL 03
 75 RCL 02
 76 *
 77 RCL 04
 78 ENTER
 79 *
 80 +
 81 LASTX
 82 /
 83 *
 84 STO 06
 85 RCL 01
 86 STO 25
 87 0
 88 STO 07
 89 RCL 06
 90 RTN
 91 LBL 17
 92 LBL c
 93 STO 22
 94 RTN
 95 LBL 18
 96 LBL d
 97 XEQ 13
 98 RCL 02
 99 RCL 03
100 *
101 STO 20
102 RCL 02
103 RCL 03
104 -
105 STO 21
106 RCL 22
107 10
108 /
109 10^X
110 1
111 -
112 SQRT
113 1/X
114 STO 07
115 ENTER
116 *
117 1
118 +
119 SQRT
120 RCL 07
121 +
122 LN
123 RCL 01
124 /
125 STO 07
126 E^X
127 STO 25
128 RCL 07
129 CHS
130 E^X
131 STO 23
132 -
133 2
134 /
135 STO 06
136 RCL 25
137 RCL 23
138 +
139 2
140 /
141 STO 05
142 0
143 STO 07
144 RCL 01
145 STO 25
146 RTN
147 LBL 19
148 LBL e
149 RCL 25
150 2
151 *
152 1
153 -
154 RCL 01
155 /
156 90
157 *
158 STO 09
159 RCL 04
160 RCL 20
161 RCL 04
162 /
163 -
164 RCL 21
165 /
166 ABS
167 RCL 09
168 ENTER
169 COS
170 RCL 05
171 *
172 X<>Y
173 SIN
174 RCL 06
175 *
176 CHS
177 ENTER
178 *
179 LASTX
180 X<>Y
181 R^
182 R^
183 -
184 X^2
185 +
186 /
187 ST+ 07
188 7DSZ
189 GTO 19
190 RCL 07
191 2
192 /
193 PI
194 /
195 RCL 21
196 /
197 RCL 20
198 RCL 04
199 ENTER
200 *
201 /
202 1
203 +
204 *
205 STO 09
206 RCL 01
207 STO 25
208 0
209 STO 07
210 RCL 09
211 RTN
212 STOP
213 END

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