stb0899_carr_width
range = bandwidth - stb0899_carr_width(state) / 2;
state->config->tuner_set_bandwidth(fe, (13 * (stb0899_carr_width(state) + SearchRange)) / 10);
state->config->tuner_set_bandwidth(fe, (stb0899_carr_width(state) + SearchRange));
extern long stb0899_carr_width(struct stb0899_state *state);