© 2016 Thorlabs GmbH
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PM320E
3.8 Histogram Mode (Energy Sensors)
The histogram mode can be accessed by toggling the ‘CHx Display’ button (right soft key) in a
Single Channel screen when an energy sensor is connected. This screen can be accessed only
when an energy sensor connected.
To initialize a histogram perform an energy measurement in the standard display and optimize
the measurement range and the trigger level. Toggle the ‘CHx Display’ button until the
histogram screen appears. Press the ‘Histogram Setup’ button and adjust the center energy to
the previously measured energy. The bin width can be set as percentage of the center energy
value, the Y-scale can be set in percent or samples. Further the number of bins can be
adjusted between 5 and 21. Energy levels that are outside of the measurement range are
shown in black bins on the left and right side of the histogram.
3.9 System Configuration
The system configuration menu contains the following items:
Item
Value
Description
LCD Brightness
0 – 100%
Sets Backlight of the LCD
Sound
ON/OFF
Local Operation/
Remote Operation
-------
Go To Local
Shows Remote State
Line Filter
50Hz / 60Hz
Sets line filter to the mains conditions to suppress
unwanted aliasing effects in the read outs
All other items are for information only and show for example serial number and software
versions.
3.10 Analog Output
The analog outputs CH1 OUT and CH2 OUT provide the amplified photodiode current or the
amplified thermal sensor voltage with the selected bandwidth. With thermal sensors, the analog
output shows the direct amplified and accelerated voltage response from the sensor. With
pyroelectric sensors, the signal from the analog output is the pulse response from the sensor
prior to the peak detection circuit.
The signals from the analog outputs are not wavelength corrected. The voltage is range
dependent within the interval from -10V to +10V.
