Hello dr, Using complex with your HP 50g is really easy, First thing you want to know is to toggle from real to complex, for this just press and hold [left-shift] and then press [TOOL], on top of the screen toggles from C to R (leave it in C). For example, let's say you want to calculate the parallel combination of Z1= 120 + j95 and Z2 = 150 j80, that is: Zp = (Z1*Z2)/(Z1 + Z2).
Make sure you are working with soft menus. (flag -117 must be set).
Let's work with just four decimal places:
Press and hold [left-shift] and then press [MODE] press [F1] to choose FMT then press 4 and [F2] to choose FIX.
In the math menu let's choose complex
Press [left-shift] [SYMB] then [NXT] and [F3] to choose CMPLX.
Let's enter the first impedance:
120 [SPC] 95 [F4] (R->C combine two real numbers in a complex number)
Let's enter the second impedance:
150 [SPC] 80 [+/-] [F4]
Find the product
[*] (this means the product key)
Let's retrieve the two impedance values:
Press [left-shift] [ENTER] (ANS in RPN retrieve the last argument(s))
find the sum
[+]
finally divide the two values
[/]
And there you have it, the value of Zp.
Make sure you are working with soft menus. (flag -117 must be set).
Let's work with just four decimal places:
Press and hold [left-shift] and then press [MODE] press [F1] to choose FMT then press 4 and [F2] to choose FIX.
In the math menu let's choose complex
Press [left-shift] [SYMB] then [NXT] and [F3] to choose CMPLX.
Let's enter the first impedance:
120 [SPC] 95 [F4] (R->C combine two real numbers in a complex number)
Let's enter the second impedance:
150 [SPC] 80 [+/-] [F4]
Find the product
[*] (this means the product key)
Let's retrieve the two impedance values:
Press [left-shift] [ENTER] (ANS in RPN retrieve the last argument(s))
find the sum
[+]
finally divide the two values
[/]
And there you have it, the value of Zp.