Hello--

I am trying to sum the real parts and the imaginary parts of two swept input impedances on a rectangular graph. In Genesys 2004 I could use equations or (better still) I could simply graph something like,

"=linear1.RES.RE[ZIN1]+linear1.Neg_res.RE[ZIN1]"

With Genesys 2006, the above sntax generates an error.

When I use the "equation wizard, it recommends...

""re(Linear1_Neg_res_Data.ZIN1)+re(Linear1_Resonator_Data.ZIN1)."

This syntax seems to return dB. What should the wizard be recommending?

I am trying to sum the real parts and the imaginary parts of two swept input impedances on a rectangular graph. In Genesys 2004 I could use equations or (better still) I could simply graph something like,

"=linear1.RES.RE[ZIN1]+linear1.Neg_res.RE[ZIN1]"

With Genesys 2006, the above sntax generates an error.

When I use the "equation wizard, it recommends...

""re(Linear1_Neg_res_Data.ZIN1)+re(Linear1_Resonator_Data.ZIN1)."

This syntax seems to return dB. What should the wizard be recommending?

If you want to sum real and imaginary, that's just simple complex addition, so you could just write

' to graph the real part

re( data1.ZIN1 + data2.ZIN1)

' or

re( data1.ZIN1) + re( data2.ZIN1)

' to graph the imaginary part

im( data1.ZIN1 + data2.ZIN1)

where data1 is the first dataset and data2 is the second dataset.

If data1 and data2 are swept with different frequency ranges you will need to interpolate one of the datasets using the interpolate function.

Mark