pt3_set_tuner_power
ret = pt3_set_tuner_power(pt3, true, true);
ret = pt3_set_tuner_power(pt3, true, false);
ret = pt3_set_tuner_power(pt3, true, false);
ret = pt3_set_tuner_power(pt3, true, true);
pt3_set_tuner_power(pt3, false, false);
pt3_set_tuner_power(pt3, true, true);