The Time Stamp Form can be used to evaluate the timestamp data and to to check the accuracy of the readout times.

The Time Stamp Data is stored in the memory, while a drift scan image, a speckle image, a fast scan image or a sub array image is taken.
There is stored the time stamp data from maximal number of lines, which can be set in Settings Computer, but it can be taken images with much more lines
It is stored the time, a line is read out form the CCD.
The time at the start of the image is 0 .
To show the data in the ListBox, press "Show Data".
To calculate the standard deviation press "Calculate standard deviation".
The data can be also saved to a file.
To save the ListBox, as it is shown, chose: File , Save ListBox to file.
To save the raw data chose: File, Save raw data to file.
The saved files are text files and can be read in by other programs.
The decimal separator in the ListBox can be changed. (affects only the ListBox in this form, in the rest of the program the decimal separator is "." )
The column separator can be used to separate the columns in the ListBox. If the data saved form the ListBox is read in form example by excel, decimal separator "." and column separator "tab" should work.
Scale is used to show / save the data in seconds, milliseconds or microseconds (ListBox, raw data is always in seconds).
The "Hide" button will hide the form.
The Edit field "Time per line (should be)" shows the time per line, as set in the Settings Form
The Edit field "mean + 3*sigma (in sec) (Calculate standard deviation)" shows "mean + 3*sigma " after pressing "Calculate standard deviation".
This value can be copied and pasted in the "Time per line in s " (Shiftime) Edit field in the Settings Form (for speckle or fast scan images)


Examples, format of the data:
Drift scan image, fast scan image:
time in ms :
Line Time Difference Error (mean) Error(whole)
Line: the number of the line
Time: the time the line is read out.
Difference = TimeLine[n] - TimeLine[n-1];
Error(mean) First the mean time to read out a line is calculated.
Error(mean)=mean - Difference;
Error(whole) The whole error.
Error(whole) = TimeLine[n] - n * Shiftime;
Shifttime is "Time per line in s" set in the Settings Form.

Speckle image:
Like the data of a drift scan image, except, a new frame is indicated with "n"

Sub frame image:
B indicates the begin of a sub frame
E indicates the end of a sub frame
In the next column the number of the sub frame is shown.
Then the time is shown.
Then the difference of the time and the time in the last line is shown
The difference in a "B" line is the time it takes to shift the lines one sub frame, if this time is to large, you will get some steaking. To avoid that, the tracking CCD should be used.
The difference in a "E" line is the time the sub frame is exposed
There are taken more sub frames as fits on the CCD to avoid effects by opening the Shutter, but of course there are only stored the last sub frames which fits on the CCD.

Effect of the accuracy of the timing in drift scan images:
Taking a drift scam image, every line must be read out at a definite time.
If one line is read out a little late, the next line will be read out earlier, that will be no problem
The first lines of the image may be read a little late, this will only degrade the first lines of the image.
If there are read out many lines to late, or if the necessary read out speed can not be reached, the quality of the image will degraded.
This may happen, if you use a very long focal length at 1 x 1 binning.
ST-7 > 4 m
ST-8 > 2 m
After taking an image, a message is shown, in this message you can check also if the necessary read out speed is reached.
If the focal length is to long, you will see this in the data.
Do not run a second active program, which requires processor time at the same time.
Don't select an other window, mousing should be avoided while taking an image.
It can be selected 2 x 2 binning, you will have a faster readout speed and have to read out a line half as often.
Or use the planetary mode (but this will decrease the FOV)
Disabling brake while taking an image may also increase the readout speed a little.