The Museum of HP Calculators

Decibel Addition and Subtraction for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HVAC 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

 01 LBL "dB+"
 02 XEQ 00
 03 +
 04 GTO 01
 05 LBL "dB-"
 06 XEQ 00
 07 -
 08 ABS
 09 LBL 01
 10 LOG
 11 10
 12 *
 13 CLA
 14 ARCL X
 15 "|- dB"
 17 RTN
 18 LBL 00
 19 10
 20 ST/ Z
 21 /
 22 X<>Y
 23 10^X
 24 X<>Y
 25 10^X
 26 END

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