meassuring delay in viva

dear all,

I would like to measure delay on signal "gap" simulated on two temp -40 and 125 with "trigger" option like:

dly_fr=delay( v("gap") 0.75 1 "falling" v("gap") 0.75 2 "rising" 1 1 t"trigger")

I am getting results like:

time delay(v("gap" delay(v("gap"

temp                       -40               125

17.8748u             38.4359u       7.67508u

56.3107u             9.60973u       38.4348u

65.9204u             38.4462u       9.60979u

104.367u             9.60927u        38.4452u

but I am expecting results something like:

17.8748u             38.4359u          38.XXXXu

56.3107u            38.XXXXu         38.4348u

65.9204u             38.4462u          38.XXXXu

(bold are expected values which also could be measured manually)

Signal shape is:

       ___       ___                            ___       ___        

___|      |___|      |_____________|      |___|      |________
                           <       fr            >

and I would like to measure value fr.

How can I correctly measure value fr? What caracters 1 1 t in the command line (marked bold) mean?

THX

Jerry