Regarding 4N26 optocoupler, I tried to obtain the following results from the datasheet by LTspice:
So as in the test condition I set the forward current 10mA and I set the Rload such that Vce = 10V.
If my setup is correct, the LTspice simulation outputs 7mA current for 10mA forward current at test condition where Vce = 10V.
So in my case CTR becomes 70%. Is what I am doing correct? Does that mean for the SPICE model of 4N26 the CTR is set 70%? By the way why would they do this test in active region where Vce = 10V? Isnt it better to use this device in saturation region?