Merge pull request #12 from nqrduck/RX-dwelltime

Rx dwelltime

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## Version 0.0.6 (05-05-2024)
+- Added a dwell time setting for receiving. Additionally the sampling frequency is now settable. (`1a6342e4cb3ee5a351547dc389873f9ce8f20a15`)
+- Measurements now have a name (`1bceba1a0f57ce168564cadecb30152020ca509c`)
+
 ### Version 0.0.5 (26-04-2024)
 - Added support for the new formbuilder provided by the nqrduck core
 

pyproject.toml

@@ -7,7 +7,7 @@ allow-direct-references = true
 
 [project]
 name = "nqrduck-spectrometer-limenqr"
-version = "0.0.5"
+version = "0.0.6"
 authors = [
   { name="jupfi", email="support@nqrduck.cool" },
 ]

src/nqrduck_spectrometer_limenqr/controller.py

@@ -1,13 +1,16 @@
 """Controller module for the Lime NQR spectrometer."""
 
 import logging
+from datetime import datetime
 import tempfile
 from pathlib import Path
 import numpy as np
+from scipy.signal import resample, decimate
 
 from limedriver.binding import PyLimeConfig
 from limedriver.hdf_reader import HDF
 
+from nqrduck.helpers.unitconverter import UnitConverter
 from nqrduck_spectrometer.base_spectrometer_controller import BaseSpectrometerController
 from nqrduck_spectrometer.measurement import Measurement
 from nqrduck_spectrometer.pulseparameters import TXPulse, RXReadout
@@ -55,6 +58,30 @@ class LimeNQRController(BaseSpectrometerController):
 
         measurement_data = self.process_measurement_results(lime)
 
+        # Resample the RX data to the dwell time settings
+        dwell_time = self.module.model.get_setting_by_name(
+            self.module.model.RX_DWELL_TIME
+        ).value
+        dwell_time = UnitConverter.to_float(dwell_time) * 1e6
+        logger.debug("Dwell time: %s", dwell_time)
+        logger.debug(f"Last tdx value: {measurement_data.tdx[-1]}")
+
+        if dwell_time:
+            n_data_points = int(measurement_data.tdx[-1] / dwell_time)
+            logger.debug("Resampling to %s data points", n_data_points)
+            tdx = np.linspace(
+                0, measurement_data.tdx[-1], n_data_points, endpoint=False
+            )
+            tdy = resample(measurement_data.tdy, n_data_points)
+            name = measurement_data.name
+            measurement_data = Measurement(
+                name,
+                tdx,
+                tdy,
+                self.module.model.target_frequency,
+                IF_frequency=self.module.model.if_frequency,
+            )
+
         if measurement_data:
             self.emit_measurement_data(measurement_data)
             self.emit_status_message("Finished Measurement")
@@ -168,7 +195,11 @@ class LimeNQRController(BaseSpectrometerController):
             evidx = self.find_evaluation_range_indices(hdf, rx_begin, rx_stop)
             tdx, tdy = self.extract_measurement_data(lime, hdf, evidx)
             fft_shift = self.get_fft_shift()
+            # Measurement name date + module + target frequency + averages + sequence name
+            name = f"{datetime.now().strftime('%Y-%m-%d %H:%M:%S')} - LimeNQR - {self.module.model.target_frequency / 1e6} MHz - {self.module.model.averages} averages - {self.module.model.pulse_programmer.model.pulse_sequence.name}.quack"
+            logger.debug(f"Measurement name: {name}")
             return Measurement(
+                name,
                 tdx,
                 tdy,
                 self.module.model.target_frequency,
@@ -456,6 +487,7 @@ class LimeNQRController(BaseSpectrometerController):
             parameter.get_option_by_name(TXPulse.RELATIVE_AMPLITUDE).value / 100
         )
         pulse_amplitude = np.clip(pulse_amplitude, -0.99, 0.99)
+
         return pulse_shape, pulse_amplitude
 
     def modulate_pulse_amplitude(
@@ -475,6 +507,11 @@ class LimeNQRController(BaseSpectrometerController):
         num_samples = int(float(event.duration) * lime.srate)
         tdx = np.linspace(0, float(event.duration), num_samples, endpoint=False)
         shift_signal = np.exp(1j * 2 * np.pi * self.module.model.if_frequency * tdx)
+
+        # The pulse amplitude needs to be resampled to the number of samples
+        logger.debug("Resampling pulse amplitude to %s samples", num_samples)
+        pulse_amplitude = resample(pulse_amplitude, num_samples)
+
         pulse_complex = pulse_amplitude * shift_signal
         modulated_amplitude = np.abs(pulse_complex)
         modulated_phase = self.unwrap_phase(np.angle(pulse_complex))

src/nqrduck_spectrometer_limenqr/model.py

@@ -8,6 +8,7 @@ from nqrduck_spectrometer.settings import (
     IntSetting,
     BooleanSetting,
     SelectionSetting,
+    StringSetting,
 )
 
 logger = logging.getLogger(__name__)
@@ -19,17 +20,18 @@ class LimeNQRModel(BaseSpectrometerModel):
     CHANNEL = "TX/RX Channel"
     TX_MATCHING = "TX Matching"
     RX_MATCHING = "RX Matching"
-    SAMPLING_FREQUENCY = "Sampling Frequency"
+    SAMPLING_FREQUENCY = "Sampling Frequency (Hz)"
-    IF_FREQUENCY = "IF Frequency"
+    RX_DWELL_TIME = "RX Dwell Time (s)"
-    ACQUISITION_TIME = "Acquisition time"
+    IF_FREQUENCY = "IF Frequency (Hz)"
+    ACQUISITION_TIME = "Acquisition time (s)"
     GATE_ENABLE = "Enable"
     GATE_PADDING_LEFT = "Gate padding left"
     GATE_PADDING_RIGHT = "Gate padding right"
     GATE_SHIFT = "Gate shift"
     RX_GAIN = "RX Gain"
     TX_GAIN = "TX Gain"
-    RX_LPF_BW = "RX LPF BW"
+    RX_LPF_BW = "RX LPF BW (Hz)"
-    TX_LPF_BW = "TX LPF BW"
+    TX_LPF_BW = "TX LPF BW (Hz)"
     TX_I_DC_CORRECTION = "TX I DC correction"
     TX_Q_DC_CORRECTION = "TX Q DC correction"
     TX_I_GAIN_CORRECTION = "TX I Gain correction"
@@ -79,15 +81,27 @@ class LimeNQRModel(BaseSpectrometerModel):
         )
         self.add_setting(rx_matching_setting, self.ACQUISITION)
 
-        sampling_frequency_setting = FloatSetting(
+
+        sampling_frequency_options = [
+            "30.72e6",
+            "15.36e6",
+            "7.68e6",
+        ]
+        sampling_frequency_setting = SelectionSetting(
             self.SAMPLING_FREQUENCY,
-            30.72e6,
+            sampling_frequency_options,
+            "30.72e6",
             "The rate at which the spectrometer samples the input signal.",
-            min_value=0,
-            max_value=30.72e6,
         )
         self.add_setting(sampling_frequency_setting, self.ACQUISITION)
 
+        rx_dwell_time_setting = StringSetting(
+            self.RX_DWELL_TIME,
+            "22n",
+            "The time between samples in the receive path.",
+        )
+        self.add_setting(rx_dwell_time_setting, self.ACQUISITION)
+
         if_frequency_setting = FloatSetting(
             self.IF_FREQUENCY,
             5e6,