sweeps
- Introduction
- Start-Up
- Setting-Up Measurements
- Measurement Sweeps
- Running Measurements
- Viewing Results
- Analysing Results
You can run measurements over a sweep of values by using one of the "Sweep" options in the "Add..." menu. For instance, if you want to run a set of measurements over a sweep of temperature, you can add a "Temperature Sweep" item like so:
Doing so will present you with a window like so:
The left-hand-side panel is where you can configure the sweep values and the right-hand-side panel is where you can add the measurements/actions to be run at each value of temperature. In this case (i.e. a temperature sweep), we can set where the sweep should begin, where it should end, how many temperature set-points there should be and the criteria FetCh should use to determine when the temperature reported by the temperature controller is stable. In the case of the screenshot above, it will:
- Start at 300 K and go down to 100 K in a total of 3 steps (i.e. 300 K, 200 K and 100 K)
- Wait until the temperature remains within 1% of the set-point for 600 contiguous seconds before considering it "stable" and starting measurements
- At each temperature value, after stabilising, run a transfer measurement followed by an output measurement
As with individual measurements, there is an "Instruments" tab where you can configure which temperature controller, PID Loop, sensor and PID values to use:
When pressing "OK", the sweep will be automatically generated and added to the measurement queue like so:
This lets you build-up measurements queues quite easily for sweeps over various quantities. Currently there are three types of sweep available:
- Temperature (as we've just seen)
- Stress (repeat measurements at specified time intervals, holding voltage on drain, gate, both or neither in-between)
- Repeat (i.e. simply repeat the measurements a set number of times)
| < Previous Page: Setting-Up Measurements | Next Page: Running Measurements > |