diff --git a/src/ria_toolkit_oss/signal/block_generator/multirate/downsampling.py b/src/ria_toolkit_oss/signal/block_generator/multirate/downsampling.py
index bfae45a..de197d9 100644
--- a/src/ria_toolkit_oss/signal/block_generator/multirate/downsampling.py
+++ b/src/ria_toolkit_oss/signal/block_generator/multirate/downsampling.py
@@ -58,3 +58,6 @@ class Downsampling(Block):
         :rtype: DataType
         """
         return DataType.BASEBAND_SIGNAL
+
+    def get_samples(self, num_samples):
+        raise NotImplementedError
diff --git a/src/ria_toolkit_oss/signal/block_generator/multirate/upsampling.py b/src/ria_toolkit_oss/signal/block_generator/multirate/upsampling.py
index d0626e5..3d98f0e 100644
--- a/src/ria_toolkit_oss/signal/block_generator/multirate/upsampling.py
+++ b/src/ria_toolkit_oss/signal/block_generator/multirate/upsampling.py
@@ -51,6 +51,9 @@ class Upsampling(Block):
         """
         return DataType.UPSAMPLED_SYMBOLS
 
+    def get_samples(self, num_samples):
+        raise NotImplementedError
+
     def __call__(self, signal: np.ndarray) -> np.ndarray:
         """Upsample the input signal by inserting zeros between samples.
 
diff --git a/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/raised_cosine_filter.py b/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/raised_cosine_filter.py
index c938b81..d2a85f0 100644
--- a/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/raised_cosine_filter.py
+++ b/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/raised_cosine_filter.py
@@ -85,13 +85,14 @@ class RaisedCosineFilter(PulseShapingFilter):
         """
         t_symbol = self.upsampling_factor
         beta = self.beta
-        f_val = (
-            1
-            / t_symbol
-            * np.sinc(t / t_symbol)
-            * np.cos(np.pi * beta * t / t_symbol)
-            / (1 - (2 * beta * t / t_symbol) ** 2)
-        )
+        with np.errstate(divide='ignore', invalid='ignore'):
+            f_val = (
+                1
+                / t_symbol
+                * np.sinc(t / t_symbol)
+                * np.cos(np.pi * beta * t / t_symbol)
+                / (1 - (2 * beta * t / t_symbol) ** 2)
+            )
         idx_limit_case = np.where(np.abs(np.abs(t) - (t_symbol / (2 * beta))) < 1e-6)[0]
         if idx_limit_case.size > 0:
             f_val[idx_limit_case] = np.pi / (4 * t_symbol) * np.sinc(1 / (2 * beta))
diff --git a/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/root_raised_cosine_filter.py b/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/root_raised_cosine_filter.py
index 1b801cb..39ba623 100644
--- a/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/root_raised_cosine_filter.py
+++ b/src/ria_toolkit_oss/signal/block_generator/pulse_shaping/root_raised_cosine_filter.py
@@ -86,10 +86,11 @@ class RootRaisedCosineFilter(PulseShapingFilter):
         alpha = 4 * beta * t / t_symbol
 
         t[t == 0] = 1e9
-        f_val = (np.sin(np.pi * t / t_symbol * (1 - beta)) + alpha * np.cos(np.pi * t / t_symbol * (1 + beta))) / (
-            np.pi * t * (1 - alpha**2)
-        )
-        f_val[t == 1e9] = (1 + beta * (4 / np.pi - 1)) / t_symbol
+        with np.errstate(divide='ignore', invalid='ignore'):
+            f_val = (np.sin(np.pi * t / t_symbol * (1 - beta)) + alpha * np.cos(np.pi * t / t_symbol * (1 + beta))) / (
+                np.pi * t * (1 - alpha**2)
+            )
+            f_val[t == 1e9] = (1 + beta * (4 / np.pi - 1)) / t_symbol
 
         idx_limit_case = np.where(np.abs(np.abs(t) - (t_symbol / (4 * beta))) < 1e-6)[0]
         if idx_limit_case.size > 0: