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