diff --git a/dmi.py b/dmi.py
index 34d6d27..afec8cf 100644
--- a/dmi.py
+++ b/dmi.py
@@ -1,3 +1,5 @@
+from math import ceil
+
 import SoapySDR
 import numpy as np
 import gc
@@ -13,6 +15,7 @@ def main():
     freq_sample = 1e6
     freq_base = 1088230e3
     block_size = 4096
+    throttle_factor = ceil(freq_sample/125e3)
 
     gui = GUI(freq_sample, freq_base, block_size)
     try:
@@ -36,7 +39,6 @@ def main():
             buf_sdr.start()
             try:
                 throttle = 0
-                throttle_factor = 8
                 position_acc = 0.0
                 while True:
                     buffers = buf_sdr.get()