TIMING


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.

Select time-base clock...

Chose the time-base clock. It defines how long one time-unit should be.

The choices are:

- 10 MHz (1 unit = 0.1 s, default)

- 1 MHz (1 unit = 1 s)

- 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).

Onboard timer speed...

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.

Set trigger point

Place a trigger point in the selected time-slot. The text in this menu item changes then to Remove trigger point .

Shortcut: space

Remove all triggers

Delete all triggering information from the timing data.

· This operation cannot be undone.

[ Allowed: ] Single 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.

The single trigger point is the default choice.

[ Allowed: ] Multiple trigger points

There may as many trigger points in the timing data as you like.

Note: the C-BIT output complements and extends the triggering possibilities. A TTL-compatible level (true/false) can be assigned to individual pulses in each or any waveform.

[ Click on time axis: ] Drag pulse width

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 marker or right-click on the pulse (anywhere in the pulse area) 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 set its width to 2 units (the minimum).

If this option is disabled use alt-click instead.

[ Click on time axis: ] Move pulse boundary

Set the way the pulse width is changed by click&drag.

If this option is enabled :

Click on the desire time slot marker or right-click on the pulse (anywhere in the pulse area) 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 as the sum of widths of these two pulses is kept constant.

If this option is disabled : use alt-click instead.

[ Mode: ] Waveform scaling

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.

This is the default setting.

Clicking on the symbol toggles it and has the same effect as the menu choice.

[ Mode: ] One pulse only

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 timing-coupled to this one, see the Coupling).