This menu deals with the clock speed in the generator, oscilloscope trigger points, the way the pulse width can be changed and the waveform speed.
Chose the time-base clock. It defines how long 1 time-unit will be.
- 1MHz (1 unit = 1 us, default)
- software-controlled (generated by the onboard timer, 1 unit = N ms)
- external clock source (connected to X-CLK input on the front-panel of the Control Module; use TTL-compatible square-wave generator of good quality; do not exceed 0..+5 V range).
Set the speed of the software-controlled time-base clock. It can be set in units of 1 ms (1...64 ms). The actual value in the microprocessor timer will be updated at the beginning of the waveform scan.
Place a trigger point in the selected time-slot. The text in this menu item changes then to Remove trigger point .
Allow only one trigger point to be present in the timing data. If you place a trigger point in another slot, the previous trigger point will be removed.
If the you change from Multiple trigger points to Single trigger point , only the first existing trigger point will remain, others will be deleted. This operation cannot be undone.
There may as many trigger points in the timing data as you like.
Note: the C-BIT output complement and extends the triggering possibilities. A TTL-compatible level (true/false) can be assigned to individual pulses in different waveform.
Set the way the pulse width is changed by click&drag.
If this option is enabled (default at startup):
Click on the desired time slot (PC also right-click on the pulse) and drag its right boundary to the desired position. Dragging past the right edge of the display will auto scroll. Dragging the pulse width to zero will delete it.
If this option is diasbled use shift-click instead.
Note : The selection zone is, counting from its right boundary, from -90% of this slot to +10% of the next pulse.
Set the way the pulse width is changed by click&drag.
Click on the desire time slot and drag its right boundary. You will move the boundary between this slot and its right neighbour. The rest of the waveform will not be affected. If you drag one of the slots to zero, it will not be deleted, but its width will be set to 2 time units and the other slot will be decreased by this amount (the sum must be constant).
At the bottom-right part of the screen there are two arrow buttons, a symbol of a waveform and a box displaying the width of the currently selected pulse (or the first one in the selected sequence). By changing this width the entire timing will be scaled proportionally.
Clicking on the symbol toggles it and has the same effect as the menu choice.
At the bottom-right part of the screen there are two arrow-buttons, a symbol of a pulse width and a box displaying the width of the currently selected pulse (or the first one in the selected sequence). Changing this width will not affect other pulses (unless they are coupled to this one, see the Coupling).