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DB.hp42s
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DB.hp42s
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LBL "DB"
CLMENU
CF 01 // no unit chosen yet
LBL 00 // show main menu
FS? 01 // unit already chosen?
AVIEW // show value with unit from ALPHA register
"Vpp"
KEY 1 XEQ 01
"dBm"
KEY 2 XEQ 02
"mW"
KEY 3 XEQ 03
"Vrms"
KEY 4 XEQ 04
KEY 9 GTO 99 // exit program
LBL 10 // main menu loop
MENU
SF 22 // asssume that a numeric value was just inputted
FS? 01 // has-unit-flag set?
CF 22 // set that no numeric value was inputted
STOP
GTO 10
LBL 01 // Vpp button pressed
FC? 22 // has no number been inputted meanwhile?
GTO 11 // no number was inputted -> convert to target unit (Vpk)
SF 01 // mark that now a unit has been added
STO 02 // remember Vpp in REG 02
2
÷ // Vpk now in REG 01
STO 01 // store base value in REG 01
RCL 02 // recall original Vpp value
CLA // clear ALPHA register
ARCL ST X // append target value to ALPHA register
├" Vpp" // append target unit
AVIEW // show ALPHA register
RTN
LBL 11 // convert from base unit (Vpk) to target unit (Vpp)
RCL 01 // recall base unit value from REG 01
2
* // Vpp now in ST X
CLA // clear ALPHA register
ARCL ST X // append target value to ALPHA register
├" Vpp" // append target unit
AVIEW // show ALPHA register
RTN
LBL 02 // dBm button pressed
FC? 22 // has no number been inputted meanwhile?
GTO 12 // no number was inputted -> convert to target unit (dBm)
SF 01 // mark that now a unit has been added
STO 02 // remember dBm in REG 02
10
-
20
÷
10↑X
STO 01 // store base value in REG 01
RCL 02 // recall original dBm value
CLA
ARCL ST X
├" dBm"
AVIEW
RTN
LBL 12 // convert from Vpp to dBm
RCL 01 // recall base unit value from REG 01
LOG
20
*
10
+ // dBm now in ST X
CLA
ARCL ST X
├" dBm"
AVIEW
RTN
LBL 03 // mW button pressed
FC? 22
GTO 13
SF 01
STO 02 // remember mW in REG 02
1000
÷
100
*
SQRT // Vpp now in ST X
STO 01 // store base value in REG 01
RCL 02 // recall original mW value
CLA
ARCL ST X
├" mW"
AVIEW
RTN
LBL 13 // convert from Vpp to mW
RCL 01 // recall base unit value from REG 01
X↑2
100
÷
1000
* // mW now in ST X
CLA
ARCL ST X
├" mW"
AVIEW
RTN
LBL 04 // Vrms button pressed
FC? 22 // has no number been inputted meanwhile?
GTO 14 // no number was inputted -> convert to target unit (Vpk)
SF 01 // mark that now a unit has been added
STO 02 // remember Vrms in REG 02
2
SQRT
* // Vpk now in REG 01
STO 01 // store base value in REG 01
RCL 02 // recall original Vrms value
CLA // clear ALPHA register
ARCL ST X // append target value to ALPHA register
├" Vrms" // append target unit
AVIEW // show ALPHA register
RTN
LBL 14 // convert from base unit (Vpk) to target unit (Vrms)
RCL 01 // recall base unit value from REG 01
2
SQRT
÷ // Vrms now in ST X
CLA // clear ALPHA register
ARCL ST X // append target value to ALPHA register
├" Vrms" // append target unit
AVIEW // show ALPHA register
RTN
LBL 99 // exit program
CLMENU
EXITALL