Redstone™ Optical Spectrum Analyzer Chapter 8: Operation
Rev C, January 21, 2022 Page 28
Figure 25. Selecting the Active Device from the Settings Bar
The selection can also be changed by pressing the button “Devices” found under the Instrument menu. This
displays a dialog window with all currently connected devices and their properties. Selecting one of the
instruments and pressing the “Select” button will change from which instrument the data is collected.
Figure 26. Devices Dialog Listing All Currently Connected Devices
To acquire data from several connected devices simultaneously, start by setting up which trace should receive
data from which device. This is done in the trace menu, which is opened by clicking the trace icon, see Figure
32. Under the menu item “Detector”, click on the menu entry with the desired device serial number and channel.
When the trace is setup in this way, the trace label displays “Write” followed by the serial number of the device
and channel in parenthesis. To start acquiring data from the devices, loop through selecting the devices as the
Active Device and pressing “Repeat” or “Single” under the Instrument menu. Devices set to running a continuous
acquisition will continue to acquire data also when another device has been selected as the Active device.
8.4.3. Acquiring a Single Spectrum/Interferogram
To acquire a single spectrum/interferogram from the spectrometer, press the button “Single” found under the
Instrument menu.
The new spectrum/interferogram will be stored in the trace(s) currently in “Write” status. Note that these traces
will be overwritten with the new information. Any trace set to automatic calculation will also be updated.
The Redstone OSA305 will acquire one spectrum/interferogram per detector, which can be shown as a stitched
spectrum or separately. Note that the noise floor of the two detectors might not be at the same level, which
presents itself as a ramp in the spectrum when there is no light in the overlap region. However, the transition is
power calibrated so that the two detector responses match with light input.
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