diff --git a/src/single-core-data-gen/generate_signal.py b/src/single-core-data-gen/generate_signal.py
index 4e943ec..1694f88 100644
--- a/src/single-core-data-gen/generate_signal.py
+++ b/src/single-core-data-gen/generate_signal.py
@@ -33,7 +33,7 @@ flags = "FFTW_PATIENT"
 nthreads = 32
 
 [fiber]
-length = 80000
+length = 10000
 gamma = 1.14
 alpha = 0.2
 D = 17
@@ -201,7 +201,7 @@ def initialize_fiber_and_data(config, input_data_override=None):
             "jitter_seed", (int(time.time() * 1000)) % 2**32
         )
         symbolsrc = pypho.symbols(
-            py_glova, py_glova.nos, pattern="ones", seed=config["signal"]["seed"]
+            py_glova, py_glova.nos, pattern="random", p1=config["signal"]["mod_order"], seed=config["signal"]["seed"]
         )
         laser = pypho.lasmod(
             py_glova, power=config["signal"]["laser_power"]+1.5, Df=0, theta=np.pi / 4
@@ -214,8 +214,8 @@ def initialize_fiber_and_data(config, input_data_override=None):
             seed=config["signal"]["jitter_seed"],
         )
 
-        symbols_x = symbolsrc(pattern="random", p1=config["signal"]["mod_order"])
-        symbols_y = symbolsrc(pattern="random", p1=config["signal"]["mod_order"])
+        symbols_x = symbolsrc()
+        symbols_y = symbolsrc()
         symbols_x[:3] = 0
         symbols_y[:3] = 0