SRS Labs Nitrogen Laser NL100, Руководство по эксплуатации и обслуживанию

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Operation 5
NL100 Nitrogen Laser
time
laser output
trigger pulse
high voltage
T
dwell
>
45 ms
T
dwell
>
45 ms
Figure 11. Timing diagram of COMMAND CHARGE mode. Note that time is not shown to scale
and the diagram does not reflect triggering delays, etc.
Where possible, we recommend using the NL100 in the COMMAND CHARGE mode.
This mode limits the amount of time high voltage resides on the laser components and
therefore improves laser performance and lifetime.
As shown in Figure 12, the trigger pulse is optoisolated from the rest of the laser
electronics. This allows triggering of the laser without permitting electrical noise from
the laser discharge from impacting the user’s electronics.
.1U
TRIG IN
TRIGGER CIRCUIT
6N137
3.9K
1N5231B
+5V
200
Figure 12. Schematic diagram of optoisolated trigger input.
Rate
When the RATE knob is in the OFF position (indicator pointing down), the laser system
is in EXTERNAL TRIGGER mode, and will fire only when an appropriate pulse is
applied either to the TRIG IN BNC or through the DB-9 connector.
When the RATE knob indicator is switched outside the OFF position, the laser system is
in INTERNAL RATE mode and will generate laser pulses between 1-20 Hz, depending
on the positioning of the RATE knob indicator.