Newport 841-P-USB, Руководство пользователя

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2.3.2.7 Anticipation
Thermal power detectors are inherently slow. The 841-P-USB uses an
algorithm to significantly accelerate the response. It is called “anticipation”.
By default, this option is enabled. The reasons for disabling the anticipation
are to slow down the response and to lower the noise level. Anticipation is
not used in energy mode.
2.3.2.8 Attenuator
Some low-power detectors come with an attenuator for which there is an
attenuation factor programmed in the detector EEPROM. This menu item
makes it a simple operation to enable or disable the attenuator correction.
Since the calibration wavelengths are often different for the attenuator, the
user should always set the wavelength after enabling or disabling the
attenuator correction.
2.3.2.9 Set Max Analog Out Range
The
Set Max Analog Out Range
setting allows you to choose the maximum
voltage that will come from the 841-P-USB. The range of the output is 0 to
2.05 volts. If the user selects 10 Watts as the maximum output range and if
the 841-P-USB measures 5 Watts, the analog out is 1.025 volts.
To set the max analog out range from the
Settings
menu, click
Set Max
Analog Out Range
. A dialog box appears so that you can enter a range.
Figure 2.9 Dialog box to set the maximum analog output range
The equation is:
 
mao read ref out
P P V V /

where:
V
out
= Output voltage of the 841-P-USB
V
ref
= 2.0475 Volts
P
read
= Power or Energy applied to the detector and is read by the
841-P-USB
P
moa
= Power or Energy set by the user (Set Max Analog Output)