Using a Scientific Calculator Program with Hexadecimal Numbers

[Keith_W7KEW]

I have the following problem:

[INDEX] : Site Index
[BASE_FREQ_n] : Base frequency (MHz)( 25.0000MHz to 1300.0000MHz, 5.0Hz step)
Base_FREQ_n = (base frequency * 10^6) / 5
(Hexadecimal number)
[SPACING_FREQ_n] : Spacing frequency(kHz)(0.125kHz to 128.0kHz, 0.125kHz step)
SPACING_FREQ_n = (spacing frequency *10^3)/125
(Hexadecimal number)
*n : Base Plan number
EX.) Base frequency = 851.00625MHz, Spacing frequency = 6.25kHz
[BASE_FREQ_n] = (851.00625*10^6)/5 = A2510A2(H)
[SPACING_FREQ_n] = (6.25*10^3)/125= 32 (H)

I'm trying to figure out how to enter in these values so that they come out correctly with a calculator.

(6.25*10^3)/125= 32 (Hex)
How do I enter in (6.25 * 10,000) / 125 in Hexadecimal
so it comes out as 32?
I haven't done this in over twenty years so forgive my forgetfulness ;-)

 

[rescue161]

If you're using the Windows calculator in scientific mode, just do the calculations as normal and then select the "hex" radio button to convert the answer from decimal to hex..

[BASE_FREQ_n] = (851.00625*10^6)/5 = 170201250 (D)
[BASE_FREQ_n] = (851.00625*1000000)/5 = 170201250 (D)
[BASE_FREQ_n] = 851006250/5 = 170201250 (D)
[BASE_FREQ_n] = 170201250 (D) = A2510A2 (H)

And

[SPACING_FREQ_n] = (6.25*10^3)/125 = 50 (D)
[SPACING_FREQ_n] = (6.25*1000)/125 = 50 (D)
[SPACING_FREQ_n] = 6250/125 = 50 (D)
[SPACING_FREQ_n] = 50 (D) = 32 (H)

Make sure you don't have "hex" selected while you're doing the calculations, or you will not get the right answers. You can use the hex equivalents instead of the decimal while you're doing the calculations, but it's just easier to use decimal and then convert it after all is said and done.

Hope this helps.

 

[Keith_W7KEW]

Thank You. I was adding an extra zero. Live & learn!