diff --git a/src/qibolab/_core/instruments/qm/controller.py b/src/qibolab/_core/instruments/qm/controller.py
index 32673058a..f8efb7a21 100644
--- a/src/qibolab/_core/instruments/qm/controller.py
+++ b/src/qibolab/_core/instruments/qm/controller.py
@@ -30,7 +30,7 @@
 from qibolab._core.unrolling import Bounds, unroll_sequences
 
 from .components import OpxOutputConfig, QmAcquisitionConfig
-from .config import SAMPLING_RATE, Configuration, operation
+from .config import SAMPLING_RATE, Configuration
 from .program import ExecutionArguments, create_acquisition, program
 from .program.sweepers import find_lo_frequencies, sweeper_amplitude
 
@@ -338,12 +338,12 @@ def register_duration_sweeper_pulses(
             if isinstance(pulse, (Align, Delay)):
                 continue
 
-            params = args.parameters[operation(pulse)]
+            params = args.parameters[pulse.id]
             ids = args.sequence.pulse_channels(pulse.id)
             original_pulse = (
                 pulse if params.amplitude_pulse is None else params.amplitude_pulse
             )
-            for value in sweeper.values:
+            for value in sweeper.values.astype(int):
                 sweep_pulse = original_pulse.model_copy(update={"duration": value})
                 sweep_op = self.register_pulse(ids[0], sweep_pulse)
                 params.duration_ops.append((value, sweep_op))
@@ -360,7 +360,7 @@ def register_amplitude_sweeper_pulses(
         for pulse in sweeper.pulses:
             sweep_pulse = pulse.model_copy(update={"amplitude": amplitude})
             ids = args.sequence.pulse_channels(pulse.id)
-            params = args.parameters[operation(pulse)]
+            params = args.parameters[pulse.id]
             params.amplitude_pulse = sweep_pulse
             params.amplitude_op = self.register_pulse(ids[0], sweep_pulse)
 
@@ -418,6 +418,9 @@ def preprocess_sweeps(
             find_lo_frequencies(args, channels, configs, sweeper.values)
             for id in sweeper.channels:
                 args.parameters[id].element = probe_map.get(id, id)
+        for sweeper in find_sweepers(sweepers, Parameter.offset):
+            for id in sweeper.channels:
+                args.parameters[id].element = id
         for sweeper in find_sweepers(sweepers, Parameter.amplitude):
             self.register_amplitude_sweeper_pulses(args, sweeper)
         for sweeper in find_sweepers(sweepers, Parameter.duration):
diff --git a/src/qibolab/_core/instruments/qm/program/instructions.py b/src/qibolab/_core/instruments/qm/program/instructions.py
index b19333b0f..f1dc1de50 100644
--- a/src/qibolab/_core/instruments/qm/program/instructions.py
+++ b/src/qibolab/_core/instruments/qm/program/instructions.py
@@ -87,7 +87,7 @@ def play(args: ExecutionArguments):
     for channel_id, pulse in args.sequence:
         element = str(channel_id)
         op = operation(pulse)
-        params = args.parameters[op]
+        params = args.parameters[pulse.id]
         if isinstance(pulse, Delay):
             _delay(pulse, element, params)
         elif isinstance(pulse, Pulse):
@@ -111,8 +111,13 @@ def _process_sweeper(sweeper: Sweeper, args: ExecutionArguments):
     if parameter not in SWEEPER_METHODS:
         raise NotImplementedError(f"Sweeper for {parameter} is not implemented.")
 
-    variable = declare(int) if parameter in INT_TYPE else declare(fixed)
-    values = sweeper.values
+    if parameter in INT_TYPE:
+        variable = declare(int)
+        values = sweeper.values.astype(int)
+    else:
+        variable = declare(fixed)
+        values = sweeper.values
+
     if parameter is Parameter.frequency:
         lo_frequency = args.parameters[sweeper.channels[0]].lo_frequency
         values = NORMALIZERS[parameter](values, lo_frequency)
@@ -148,7 +153,7 @@ def sweep(
                 method = SWEEPER_METHODS[sweeper.parameter]
                 if sweeper.pulses is not None:
                     for pulse in sweeper.pulses:
-                        params = args.parameters[operation(pulse)]
+                        params = args.parameters[pulse.id]
                         method(variable, params)
                 else:
                     for channel in sweeper.channels: