BKTR_SLEEP
tsleep( BKTR_SLEEP, 0, "tuning", hz/8 );
status = tsleep(BKTR_SLEEP, BKTRPRI, "captur", 0);
error = tsleep(BKTR_SLEEP, BKTRPRI, "captur", hz);
wakeup(BKTR_SLEEP);
tsleep( BKTR_SLEEP, 0, "tuning", hz/8 );