diff --git a/ofdm/ofdm_rx.m b/ofdm/ofdm_rx.m
index b1918e3..c363c27 100644
--- a/ofdm/ofdm_rx.m
+++ b/ofdm/ofdm_rx.m
@@ -393,7 +393,7 @@ while((fileRemain > fileChunkSize) | (buf_recv.len() > 2*N))	% ToDo: don't leave
 %					delta_theta = sign(delta_theta);
 					
 %					delta_theta = max(-1, min(1, delta_theta));
-					[sample_offset_fractional, leadLag_f_z] = leadLag(delta_theta, 0.001, 0.000, leadLag_f_z);
+					[sample_offset_fractional, leadLag_f_z] = leadLag(delta_theta, 0.004, 0.000, leadLag_f_z);
 					[sample_offset_integer, leadLag_i_z] = leadLag(delta_theta, 0.01, 0.000, leadLag_i_z);
 					%delta_theta = max(min(delta_theta,max_delta_theta),-max_delta_theta)+0;
 					%sample_offset = sample_offset - 0.1*delta_theta;