DAZZLER
TM
system manual Part I : installation & operation 5.1
1. the single mode which is the normal operation mode when one RF cycle is started by
one external trigger.
2. the continuous mode reserved for low power and alignment. As soon as a RF cycle is
finished, another one is started. The external trigger is only used to start the generation,
and to re-synchronize.
3. the list on the right side is a choice selector (by clicking) :
A: RF from A memory,
B: RF from B memory,
A/B: Alternate switches between A and B at each trigger (information on current memory
can be obtained by signal hiwhena available on the S1 output).
5.1.8 Damage prevention
The acousto-optic crystal assembly can only withstand a limited RF power, the transducer
damage threshold being the main limit. The transducer can tolerate a maximum instantaneous
peak RF power which is much higher than the average power
3
.
The Dazzler
TM
software is designed so that, in most cases, user actions which would lead to
excessive power will be detected and blocked before the generator condition is actually changed.
• the top right message banner (Figure 5.6) shows actual values: the trigger frequency,
alarms and warnings. The power/damage ratio value reflects the current RF power com-
pared to the maximum allowed power for the currently active waveform. The parameter
f/limit reflects the ratio of the measured repetition frequency over the maximum possi-
ble repetition rate, depending on trigger delay settings.
Figure 5.6: Actual average power ratio and signal truncation due to timing
• the message text box at the bottom right part of the main panel displays a simulation.
Based on the current trigger frequency (1/TXtal frequency for continuous mode) and the
current software control settings, the average power, expressed as a ratio of the crystal
power limit are shown in the message banner (see Figure 5.7).
Figure 5.7: Simulation of current wave average power ratio
A percentage above 100% would lead to an excessive RF average power. In this case, the
software prevents the user from loading the current waveform (Figure 5.8).
3
the HR 25 tolerates 50W peak and the average power should not go above 3W.
V3.00 - 8
th
April 2019 (ContentsTable) (FiguresTable) 42/94
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