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Trigger System Block Diagram - Goose Trigger
The "Diode Box" is what is used to combine triggers when in goose trigger mode. In this case the box is combining 119 Hz with 1 Hz to make 120 Hz to trigger the regen. The DG545 is used as an amplifier because the diode drop across the diode (about 0.6V) from the diode box makes the signal into the pacemaker too low. The DG545 is programmed to add a small delay to the 120 Hz signal for future flexibility, this box should never be adjusted. The pacemaker is a box that measures the frequency of the incoming signals and if they differ from the expected 10 Hz of 120 Hz (channel specific) by more than 1 Hz it provides its own 10 or 120 Hz. This is to ensure the laser always gets triggers. The DG645 and Coherent SDG convert the EVR triggers into various triggers for the lasers. These boxes are very rarely adjusted.
How does the goose trigger work?
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