ILS Strobe Lighting Systems
DOC-3400-MNL Rev23.doc
(9/22/2021)
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Besides the flash tube, each flash head contains terminals to connect the flash head
cable from the power supply, a coupling transformer, a trigger transformer, a R/C network,
and an interlock switch. The transformers shape the amplitude of the trigger pulse
applied to the flash tube. The interlock switch is provided for safety and disconnects the
high voltage from the flash tube and also stops triggering the tube.
The flash tubes are three terminal Xenon-filled glass discharge tubes. High voltage is
applied across two of the terminals of the flash tube, the positive electrode or anode and
the negative electrode or cathode. A third terminal, the trigger, is used to temporarily
energize the tube and produce a short brilliant white flash.
Figure 7: FH0-3400-000 Flash Tube Detail
