FMCG/Data Acquisition with LabVIEW Software: Difference between revisions

## The first prompt will tell you to calibrate the '''OPAMP_Y'''. During this stage of the calibration, the calibration chirp will be applied to the coil current supply circuit, and the '''monitor''' voltage from that circuit will be read. First, ensure on the main box that the '''Z-Mode''' switch is set to '''OFF''' and the '''Chirp''' switch is set to '''Y'''. Now, on the the FPGA breakout box, flip the switches under the green FPGA monitor BNC ports '''UP'''. This will connect the FPGA input to the monitor output on the Y current supply. Once this is done, click '''OK''' on the LabVIEW prompt and the sequence of 5 (or whatever you selected) chirp signals will be applied sequentially to the current supplies and the circuits' responses will be recorded.

## The next prompt will tell you to calibrate the '''MAGNETOMETER_Y'''. The chirp will be applied to the same current supply, except now the FPGA input should be connected to the magnetometer signals from the photodiodes (via the I-V converters). Flip the switches below the green ports '''DOWN''' to make that happen. Then click '''OK''' on the prompt. You should see the chirp signals appear on the scope. If the chirp signals are too large or a DC field has caused the magnetometer signal to swing such that the output rails during the calibration, it will have to be redone later. For now, just assume that it went fine.

# When the time series has been collected, the progress bar will be completely lit up and the message '''DONE''' will flash above it. Collection complete! Don't hit the '''STOP''' button yet, though!