diff --git a/ohmpi/hardware_components/mb_2024_0_2.py b/ohmpi/hardware_components/mb_2024_0_2.py
index f59efcd359758ef26cbead9a86241b132fd94554..1d916dac7c70e1d5f070f07eaedd719d84db5083 100644
--- a/ohmpi/hardware_components/mb_2024_0_2.py
+++ b/ohmpi/hardware_components/mb_2024_0_2.py
@@ -1,5 +1,4 @@
 import datetime
-import time
 import adafruit_ads1x15.ads1115 as ads  # noqa
 from adafruit_ads1x15.analog_in import AnalogIn  # noqa
 from adafruit_ads1x15.ads1x15 import Mode  # noqa
@@ -81,29 +80,6 @@ class Tx(Tx_mb_2023):
         Tx_mb_2023.inject(self, polarity=polarity, injection_duration=injection_duration)
         self.pin6.value = False
 
-    @property
-    def polarity(self):
-        return self._polarity
-
-    @polarity.setter
-    def polarity(self, polarity):
-        print(polarity)
-        assert polarity in [-1, 0, 1]
-        print(f'asserted polarity: {self.polarity}')
-        self._polarity = polarity
-        if polarity == 1:
-            self.pin0.value = True
-            self.pin1.value = False
-            time.sleep(self._activation_delay)
-        elif polarity == -1:
-            self.pin0.value = False
-            self.pin1.value = True
-            time.sleep(self._activation_delay)
-        else:
-            self.pin0.value = False
-            self.pin1.value = False
-            time.sleep(self._release_delay)
-
 
 class Rx(Rx_mb_2023):
     def __init__(self, **kwargs):
diff --git a/ohmpi/hardware_system.py b/ohmpi/hardware_system.py
index 50e41c0a88e011f65743605eb2ff71974a539b02..8660145880c223fc2f0c2b40c1a7b90f2896d8b1 100644
--- a/ohmpi/hardware_system.py
+++ b/ohmpi/hardware_system.py
@@ -123,7 +123,7 @@ class OhmPiHardware:
                 ctl_mod = importlib.import_module(f'ohmpi.hardware_components.{ctl_mod}')
             HARDWARE_CONFIG['tx']['ctl'] = ctl_mod.Ctl(**HARDWARE_CONFIG['tx']['ctl'])
         HARDWARE_CONFIG['tx'].update({'connection': HARDWARE_CONFIG['tx'].pop('connection',
-                                                                              HARDWARE_CONFIG['rx']['ctl'].interfaces[
+                                                                              HARDWARE_CONFIG['tx']['ctl'].interfaces[
                                                                                   HARDWARE_CONFIG['tx'].pop(
                                                                                       'interface_name', 'i2c')])})
         HARDWARE_CONFIG['tx'].pop('ctl', None)
@@ -204,6 +204,7 @@ class OhmPiHardware:
 
     def _inject(self, polarity=1, injection_duration=None):  # TODO: deal with voltage or current pulse
         self.exec_logger.event(f'OhmPiHardware\tinject\tbegin\t{datetime.datetime.utcnow()}')
+        print('inject')
         self.tx.voltage_pulse(length=injection_duration, polarity=polarity)
         self.exec_logger.event(f'OhmPiHardware\tinject\tend\t{datetime.datetime.utcnow()}')