55
Status panel
Note: If the frequency of the input trigger signal is very low i.e. 10 Hz, then the ar-
row states change at roughly the rate of the trigger signal pulses. At higher trigger
signal frequencies, the arrows appear steady ON.
Note: Visible flashing of the arrows may also indicate that the trigger signal level
is slightly low, such that only a few of the trigger signal pulses are detected. If the
signal level cannot be increased, decrease the trigger threshold level slightly
(Coax trig input only).
Pulse overrun
When operating at low repetition rate and the repetition rate is increased, a Pulse
overrun state may occur. For example, changing from 1 kHz to 20 kHz could
momentarily trigger a Pulse overrun state due to the sudden change in pulse
acquisition. When this occurs, increase the repetition rate in smaller steps of for
example, 5 kHz. Whenever a Pulse overrun state is encountered, turn down the
repetition rate until the Pulse overrun warning disappears.
A Pulse overrun state can also occur when set to burst mode. To avoid this,
either lower the number of pulses or lower the repetition rate.
When operating in Internal Trigger mode and a continuous Pulse overrun
warning is observed, contact support – see “Support contact details” on
page 94.
Interlock
Indicates the status of the Interlock circuit and whether emission can be turned
ON or not. The indicator will be either:
• ON RED – the interlock circuit is open or shorted to ground – No emission
permitted
• OFF GREY – the interlock circuit is closed and reset – emission permitted
To clear the ON RED indicator, the interlock circuit must be closed and reset. Any
shorts to ground must be removed.
Status
Indicates the operational status of the laser. The indicator has the following
states:
• ON GREEN – The laser emission can be turned ON.
• ON RED – There is a fault, laser emission is shutdown and cannot be turned
ON. A fault message will be displayed when this indicator turns ON RED:
Fault Message Action
Interlock opened while emission on a) Cycle the key switch to OFF and then ON
b) Close the external interlock circuit
Watchdog timeout Reconnect NKTP CONTROL and reset the interlock
by cycling the key switch.
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