PicoQuant GmbH HydraHarp 400 Software V. 3.0.0.1
6.5. Axis Panel
The controls of the Axis Panel are used to customise the main window's curve display.
Apply–button
All mouse actions on the spin controls on this dialog result in instant modification of the display. If you choose
to alter the values in the edit fields by keyboard, you have to finish your changes by pressing <Enter> or to
click the Apply–button.
All other controls are grouped as follows:
6.5.1. Time Axis Group
Note that the time axis labelling is precise in terms of relative information only. At offset=0 the absolute time
difference between the inputs is close to the shown times but may be off by some tens of picoseconds. Offsets
>0 change the placement of the acquisition window and the true time differences are then off accordingly.
Minimum edit box and spin control
Here the start of the displayed time axis can be set. Units are nanoseconds (ns). The minimum is 0. If the
entered value exceeds the current time axis maximum, an error message appears. When using the spin control
exceeding the current time axis maximum is simply not allowed. Instead of incrementing the minimum value
further, the system beeps a warning. Observe the notes on time axis interpretation given in the paragraph Time
Axis Group above.
Maximum edit box and spin control
Here the end of the displayed time axis can be set. Units are nanoseconds (ns). The maximum allowed here is
2.2 s. If the entered value becomes smaller than the current time axis minimum, an error message appears.
When using the spin control, violating the current time axis minimum is automatically prevented. Instead of
decrementing the minimum value further, the system beeps a warning. Observe the notes on time axis
interpretation given in the paragraph Time Axis Group above.
The time axis settings will determine the number of time bins exported via clipboard copy / paste. Only the bins
within the displayed time range will be used.
6.5.2. Count Axis Group
Minimum edit box and spin control
Here the start of the displayed count axis can be set. Units are counts. In linear scale mode the default
increment / decrement is 100. In log scale mode it is one decade. If the minimum is set to 0 in logarithmic
mode, the resulting minimum as displayed is 10
−1
. If the entered value exceeds the current count axis
maximum, an error message appears. When using the spin control, exceeding the current count axis maximum
is automatically prevented. Instead of incrementing the minimum value further, the system beeps a warning.
Maximum edit box and spin control
Here the upper end of the displayed count axis can be set. Units are counts. In linear scale mode the default
increment / decrement is 100. In log scale mode it is one decade. If the entered value becomes smaller than
the current time axis minimum, an error message appears. When using the spin control, violating the current
count axis minimum is prevented automatically. Instead of decrementing the minimum value further, the system
beeps a warning.
Lin / Log radio buttons
These radio buttons change the inner scaling of the count axis from linear to logarithmic and vice versa.
Despite the fact that in logarithmic scale the display will always show whole decades, the change of the scaling
is applied without modifying the minimum / maximum range.
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