Step size Questions

[N4DXX]

I use arc 250 pro to program my 796d and it does not automatically enter the correct step size in the vhf range..For example our new fire system is 155.6025 and 155.4225 is this 7.5 step?and is it standard for the vhf range or is 6.25 used in this range as well..And some tips you may use for calculating the correct step size would be nice...I forget due to old age..Thanks

 

[slicerwizard]

What's the difference between 155.6025 and 155.4225 MHz?

It's 180 kHz.

Is 180 a multiple of 7.5? Yes, it is.

 

[captclint]

I use arc 250 pro to program my 796d and it does not automatically enter the correct step size in the vhf range.

Mine does, so I went to see where it might specify. Go to Set-up, Software, Bandplan. I have Round freq and 7.5mhz checked. I don't have enable step logic (Not sure if that matters).