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Message ID: 775
Entry time: Thu Apr 1 18:33:40 2021
Reply to this: 798
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| Author: |
Eric Dufresne |
| Type: |
8-ID-E |
| Category: |
Controls |
| Subject: |
function generator out of user Calc records for square wave |
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I made a function generator out of user Calc records to generate a square wave.
The time axis is connected to the AreaDetector Image Counter.
Because the expression is too long, it connects userCalc7 to userCalc6.
Note that the output of userCalc6 is read in variable A in userCalc7.
The calculation can only be as long as I have in userCalc6 so I had to nest two userCalcs.
In this attachment showing a test, userCalc6 goes from 0 to 1 with a period of NumImages/10 = 60 files, the switch occurs
every 30 files and it goes from 0, 0.5 and 1 in three files.
I would try to keep in the number of periods even like 2,4...
It drives the Keithley Source meter https://logbook.xray.aps.anl.gov/8id/8-ID/528
so this is convenient for higher excitation voltages.
An earlier version is shown in att. 3 for userCalc5.
It did only on 50% off 50%.
My users also made a sinusoidal version in att. 4.
ED |
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