tremolo: 3/4 time, one dotted-half note chord, double-slash tremolo question

[Kenneth Wolcott]

Hi;

  I'm still do not understand the math (I'd like to generate a
formula!) for tremolos.

  I have a tremolo that I'd like to engrave in 3/4 time, one
dotted-half note chord, double-slashed.

  I'd like to use the repeat tremolo syntax so that I can obtain midi
output (without using the articulate feature).

  Please see attached screenshot.

Thanks,
Ken Wolcott