User manual

The top two horizontal slider displays are used to show how accurate the tracking is. The
firmware computes the errors in its two reference clocks every 2 seconds, and the errors found
are used to set the arrow marker.
The two vertical slider displays are used to show the control values used by the firmware to
“track” the frequency. Each vertical slider has two markers. The one on the left shows the
value defined by the last calibration and it does not change. The right marker shows the
current value. Of the two sliders, the more significant one is the
one headed “Chan.”. The
one headed “Mod.” refers to the Modulation reference oscillator, which is always tracked to
the other reference oscillator. If there is a significant difference between the two markers on
the vertical slider headed “Chan.” then the unit should be
recalibrated. This is achieved, by
simply clicking on the button marked “Save DAC values”.
Clicking this button will start a process that may take up to a minute. At the end, the display
will be redrawn and the markers on the left side of the two vertical sliders will change to
reflect the new calibration values.
One can then end this process by clicking on the Cancel button (the button marked “X” at the
top right of the dialog box).