THORLABS ITC4000 Series, Руководство по эксплуатации

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ITC4000 Series
Pulse frequency / Pulse period
This is the pulse repetition rate in case of internal triggering. Pulse frequency is the reciprocal
value of the pulse period. If you change one value the other will be readjusted automatically.
The pulse period can be changed from 1ms to 5s, the pulse frequency accordingly from 1 kHz
to 0.2 Hz.
Duty cycle
Means the duration of the QCW pulses in relation to the pulse period. It can be set from
0.002% to 99.999% depending on the used pulse period.
Pulse width
Means the duration of the QCW pulse and can be set from 100µs to 1s pulse width.
Hold parameter
Sets the parameter to be held constant when the pulse period or the frequency changes. The
hold parameter can be the duty cycle or the pulse width.
If the trigger source is set to external, the following parameters will be shown.
Minimum pulse period
The minimum pulse period indicates the minimum permitted time between the rising edges of
two trigger pulses. Trigger pulses following after a time interval shorter than the minimum pulse
period will be ignored.
Pulse width
Corresponding to the internal triggering the QCW pulse width can be changed from 100µs to
1s.
Pulse frequency
With an external trigger source, the pulse frequency is a measured value and therefore can't be
set.