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46 . Spectrum RX I Getting Started Guide
Determining the Signal-to-Noise Ratio
Although the Spectrum RX I will automatically perform a signal-to-noise ratio
during installation, the following section describes how to perform a manual
signal-to-noise ratio.
1.
Make sure that the sample slide is empty, the Jacquinot stop (J-stop) is
removed and the lever for the alignment light is in the off position
(Figure 18).
Figure 18 Preparing the Sample Slide
.
2.
Press
shift
restore
setup
factory
This ensures that all the instrument parameters are set consistently.
3.
Press
scan
Backg
16
The Spectrum RX I collects 16 background scans. Wait until the scan
status box reports
READY
before continuing.
4.
Press
scan
X
1
The Spectrum RX I collects a single scan - the 100% line - and ratioes it
against the 16 background scans. The scan is stored in region X. Wait for
the scan to be completed before continuing.
Jacquinot Stop
Alignment light off
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