repeated measurements in Spectre

 Hello everybody,

I was wondering if there is an easy way to do a repeated measurement in Spectre by using Spice or MDL syntax. For example, assume you want to measure the rise time of a node in a circuit repeatedly and you have no idea when the rise events happen or how many rise events you would have. In Hspice one can easilly add the following line to the netlist:

.meas tran_cont Trise TRIG V(z) val=0.1 TARG V(z) val=1.1 Rise=1

 But if you add the same line to Spectre netlist by using "simulator lang=spice" it will give you error because Spectre cannot parse "tran_cont". Changing "tran_cont" to "tran" will remove the error but this will only measure the very first risetime event.

If you use MDL then you can have the following lines to measure risetime:

alias measurement Trise {
     export Rise_Time
     export real VDD = 1.2

     run tran

     Rise_Time = risetime(V(z),0,VDD,theta1=10,theta2=90)
}
run Trise

However, this will also measure only the very first risetime event. I found a solution for measuring repeated risetime events by using a foreach loop and two cross functions where the edge number is changed inside the loop. But this way I have to know in advance how many risetime events I would have to set the loop index or select an adequately large index and expect to get some NaN values at the output.

I am wondering if there is an easy way to do repeated measurements in Spectre by using either MDL or Spice syntax?

Thanks