src/ria_toolkit_oss/sdr/blade.py

@@ -375,14 +375,18 @@ class Blade(SDR):
         return samples
 
     def _convert_tx_samples(self, samples):
-        tx_samples = np.empty(samples.size * 2, dtype=np.float32)
-        tx_samples[::2] = np.real(samples)  # Real part
-        tx_samples[1::2] = np.imag(samples)  # Imaginary part
+        # Normalize to maximum amplitude to prevent overflow
+        max_val = np.max(np.abs(samples))
+        if max_val > 0:
+            samples = samples / max_val  # Normalize to [-1, 1]
+
+        # Scale to Q11 format (use 2047 instead of 2048 to avoid overflow)
+        # and interleave I/Q samples
+        tx_samples = np.zeros(len(samples) * 2, dtype=np.int16)
+        tx_samples[0::2] = (np.real(samples) * 2047).astype(np.int16)  # I samples
+        tx_samples[1::2] = (np.imag(samples) * 2047).astype(np.int16)  # Q samples
 
-        tx_samples *= 2048
-        tx_samples = tx_samples.astype(np.int16)
         byte_array = tx_samples.tobytes()
-
         return byte_array
 
     def _set_rx_channel(self, channel):

src/ria_toolkit_oss/sdr/usrp.py

@@ -100,6 +100,11 @@ class USRP(SDR):
         self.usrp.set_rx_gain(abs_gain, channel)
 
         # check if sample rate arg is valid
+        # Note: B200/B210 devices auto-adjust master clock rate, so get_rx_rates() returns
+        # the range for the CURRENT master clock, not the maximum possible range.
+        # Skip validation for B-series devices and let UHD handle it.
+        device_type = self.device_dict.get("type", "").lower()
+        if device_type not in ["b200", "b210"]:
             sample_rate_range = self.usrp.get_rx_rates()
             if sample_rate < sample_rate_range.start() or sample_rate > sample_rate_range.stop():
                 raise IOError(
@@ -317,6 +322,11 @@ class USRP(SDR):
         self.usrp.set_tx_gain(abs_gain, channel)
 
         # check if sample rate arg is valid
+        # Note: B200/B210 devices auto-adjust master clock rate, so get_tx_rates() returns
+        # the range for the CURRENT master clock, not the maximum possible range.
+        # Skip validation for B-series devices and let UHD handle it.
+        device_type = self.device_dict.get("type", "").lower()
+        if device_type not in ["b200", "b210"]:
             sample_rate_range = self.usrp.get_tx_rates()
             if sample_rate < sample_rate_range.start() or sample_rate > sample_rate_range.stop():
                 raise IOError(