v0.5.0-1

New Features

• Better sweep controls make it easier to adjust the sweep range and allow to stop the sweep altogether.
• A new, faster PID-only mode allows for a higher control bandwidth by skipping modulation/demodulation steps (useful for offset locks).
• Added Welch's method to the measurement of the error signals power spectral density (PSD).

Note: This is a post-release to the botched version v0.5.0 that by accident did not include the gateware.

API Changes

• The parameters that deal with the sweep / ramp have been renamed:
  • "center" is now "sweep_center"
  • "ramp_amplitude", "ramp_speed" and "autolock_initial_ramp_amplitude" are now "sweep_amplitude" and "sweep_speed" and "autolock_initial_sweep_amplitude", respectively
  • There is a new boolean parameter "sweep_pause".

Relevant Pull Requests

• Add and configure flake8 support by @bleykauf in #186
• Fix relative imports in server.py. by @bleykauf in #188
• Rework requirement files and install_requires by @bleykauf in #187
• Actually merge fixed imports to master by @bleykauf in #192
• Bump cryptography from 3.0 to 3.3.2 by @dependabot in #191
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #199
• Renaming connection objects and some cleanup by @bleykauf in #200
• add lowpass filter for psd acquisition #196 by @hermitdemschoenenleben in #201
• Some quick fixes to the documentation. by @bleykauf in #209
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #211
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #213
• fix pyqt import issues #215 by @hermitdemschoenenleben in #217
• Use Git LFS for storing the FPGA images by @bleykauf in #220
• Fix FPGA script paths. by @bleykauf in #221
• Fast mode by @hermitdemschoenenleben in #216
• expose choice of LPSD / scipy in GUI #205 by @hermitdemschoenenleben in #206
• Cleanup gateware. by @bleykauf in #219
• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #222
• Fix testing. by @bleykauf in #223
• Improve tests by @bleykauf in #225
• Better controls for sweep by @bleykauf in #228
• Improve tests by @bleykauf in #229
• Add pause functionality to sweep. by @bleykauf in #233
• Bump numpy from 1.19.1 to 1.21.0 by @dependabot in #232
• Make new sweep controls work for slow outputs. by @bleykauf in #241

New Contributors

• @bleykauf made their first contribution in #186
• @dependabot made their first contribution in #191
• @pre-commit-ci made their first contribution in #199
• @hermitdemschoenenleben made their first contribution in #201

Full Changelog: v0.4.3...v0.5.0-1

0.4.3

• Disabled LED blinking as it causes additional noise (thanks to Yao-Chin!)
• DC spectroscopy signal is displayed (thanks to aisichenko for the idea!)
• lpsd is now used for psd measurements (samples psd on a log scale)
• various bug fixes especially in the autolock component

0.4.2

• Removed "Check lock" and "Watch lock" features as they caused problems with the new autolock algorithms as well as with noise analysis. These features are planned to be reimplemented in a future release (and in a more sophisticated way). If you rely on these features, consider using Linien version 0.3.2 until then.

0.4.1

• fixed a bug in the server package that leads to an incomplete install

0.4.0

• Implemented new autolock algorithms that are faster and work with high jitter
• For noise analysis, PSD of the error signal may be recorded
• Plot window of the main window may be zoomed / panned by clicking and dragging / using the mouse wheel
• Parameters are not only backed up on the client side but also on the server. When a client connects to a server with parameter mismatch, the user may decide whether to keep local or remote parameters

0.3.2

• FIX: incompatibility with rpyc==5.0.0
• improved documentation

0.3.1

This version fixes PID derivative

0.3.0

New features

• IQ demodulation (simultaneous orthogonal demodulation) allows for determination of the spectroscopy signal strength. This makes one-shot optimization of the demodulation phase possible
• Improved optimization algorithm: Automatic optimization of the slope of a line is now more robust and converges faster
• More accurate autolock: Autolock reliability was improved
• ANALOG_OUTs can be set using python client or GUI
• Digital GPIO outputs are now accessible using python client
• Keyboard shortcuts for zoom and pan: Use ← / → / + / -
• Device editing is now possible, leaving device's parameters untouched
• Extra package for python client: pip install linien-python-client installs a headless version of the linien client that allows to control your lock in an environment that doesn't provide GUI libraries
• Bug fixes and performance improvements

0.2.3

• small improvements to user interface

0.2.2

• Fix bug that caused ramped to not be disabled when locking is turned on