Noise - josalggui/MaRGE GitHub Wiki

Noise

This sequence simply opens the Rx gate to measure noise with a specified bandwidth and resolution.

  • RF frequency offset (kHz): Frequency offset in kHz relative to the calibrated Larmor frequency, which is found in larmorFreq in configs/hw_config.py.
  • Number of points: Number of points to be acquired.
  • Acquisition bandwidth (kHz): Bandwidth of the acquired signal.
  • Rx channel: Selected channel for noise measurement.
  • Repetition time (ms): Time delay between measurements.

After execution, the console displays the obtained RMS noise value and the expected value. To ensure the correct expected noise is shown, the user should configure the lnaGain in the configs/hw_config.py file.

NOTE: No information about the coil is required to estimate the expected noise, as the noise is coil-independent after tuning and matching.

Noise