THORLABS PM320E, Руководство по эксплуатации

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3 Operating Instruction
15
3.1.6 Setting an Attenuation Factor
The Attenuation Menu allows to set a user correction factor to the power reading. This is very
convenient, for example, to compensate the measurement result for the attenuation of a filter or
beam splitter in the system.
To enter an attenuation factor, press the <CHx Setup> soft button, navigate and click the
‘Attenuation’ button. Set the desired attenuation in dB, then press <OK> or click the control
button. Exit the setup menu.
3.1.7 Trigger Input
For power and energy measurements the PM320E has two trigger modes that can be selected
for each channel in the CHx Setup under <Trigger Source>:
Depending on the connected sensor the selected trigger source has the function shown in the
table below.
Sensor Trigger Source Auto Trigger Source Extern
Photodiode /
Thermal continuous power measurement
with fixed sampling rate A rising edge TTL signal at the rear
BNC trigger input will trigger a single
measurement
Pyroelectric All pulses that exceed the trigger
threshold will be measured
automatically A rising edge TTL signal resets the
peak detector, the system is waiting
for the next incoming pulse to
measure