DAZZLER
TM
system manual Part I : installation & operation 8.6
Figure 8.3: Standard RF cycle - no delay - zoom
8.6.2 Continuous mode
This mode is reserved for low power and alignment. It deposits a lot more power into the
crystal. As soon as a cycle is finished, another one is started: this is done during several
sampling clock periods. The external trigger is only used to re-synchronize
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. See Figure 8.4.
Truncation of one waveform cannot be avoided on every trigger, unless the trigger period is an
integer multiple of gate duration + a few 100 ns.
8.6.3 Alternate mode
On Figure 8.5 the blue vertical arrow at the frame bottom is the scope trigger point. The red
trace is gate. Memory A is loaded with a wide waveform with one trough and memory B has
3 peaks.
The next oscillogram on Figure 8.6 shows when both continuous mode & alternate are selected.
The red trace shows gate while hiwhenA is shown on the green trace. This demonstrates
the alternation of A & B and that the signal hiwhenA can be used to synchronize external
equipment
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. hiwhenA changes state on the trailing edge (at the end) of gate. This gives
enough time to the synchronised equipment to switch as well as removing ambiguity on the
waveform displayed. Note that trigparity is similar to hiwhenA and is always pulsing, even
when there is no change is selection A or B.
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the trigger used to be required to start generation but an internal change in the firmware starts generation
when the mode is asserted, thus the trigger is only used to re-synchronize. Some customers run their Dazzler
without any trigger connected !
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typically used with a lockin amplifier
V3.00 - 8
th
April 2019 (ContentsTable) (FiguresTable) 84/94
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