Model 1835-C - Newport Corporation
Model 1835-C - Newport Corporation
Model 1835-C - Newport Corporation
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NOTE<br />
When using the digital filter in SNGL acquisition mode , each measurement is<br />
the average of the last 10 acquisitions independent of how old any of the<br />
measurements are.<br />
Gain<br />
Gain processing accounts for the signal gain of the input amplifiers. The<br />
output is the product of the digitized value and the amplifier gain.<br />
Zero Offset<br />
Zero offset is active whenever the ZERO annunciator is lit, Section 2.3.5. The<br />
zero offset output is equal to the input value less the zero reference value,<br />
S-S o<br />
.<br />
Responsivity Map(s)<br />
This process scales the input value in accordance with current calibration<br />
wavelength and the responsivity map downloaded from the detector calibration<br />
module. The output of this process, i.e. the measurement value, is the<br />
digitized input value divided by the responsivity associated with the current<br />
calibration wavelength or the user defined calibration value. Different<br />
responsivities are used depending upon if the attenuator, ATTN, annunciator<br />
is lit, Section 2.3.8.<br />
Units Correction<br />
Units correction adjusts a measurement value to account for the display units<br />
selected. When the display units are equal to the detector signal units, i.e.<br />
equal to the numerator of the responsivity units, Table 22, the measurement<br />
value is not adjusted. Otherwise the digitized value is adjusted to account for<br />
detector responsivity and/or additional unit conversions such as Joules-to-<br />
Ergs or W-to-W/cm 2 .<br />
NOTE<br />
Per area unit conversions such as W-to-W/cm 2 divide the measurement value<br />
by the active area of the detector. This calculation assumes that the entire<br />
active area of the detector is uniformly illuminated. Per area measurements<br />
where the entire detector active area is not uniformly lit are not accurate.<br />
The user must insure that these conditions are met before utilizing per area<br />
units.<br />
Data Store Buffer<br />
Units correction adjusts a measurement value to account for the display<br />
units selected. When the display units are equal to the detector signal units,<br />
i.e. equal to the numerator of the responsivity units, Table 22.<br />
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