BSA Flow Software Installation and User's Guide - CSI

10. ptical LDA System properties include the wavelength and other optical
parameters.
The optical parameters that you defined in the Dantec Device
Configuration will appear in the list. If necessary, you can modify them.
The default value of Expander ratio is 1 corresponding to no beam
expander.
The nominal Beam diameter, Expander ratio and Beam spacing are
specified in the user’s guide for the optics.
The Frequency shift is 40000000 Hz for Dantec Dynamics FiberFlow and
FlowLite optical systems, and 80000000 Hz for FlowExplorer optical
systems.
Note The software computes the effective beam spacing at the front lens as Beam
Spacing multiplied by Expander Ratio
Alternatively, the beam spacing at the exit of the beam expander can be
used. In that case, set the Expander Ratio to 1, and the Beam Spacing to
the one at the exit of the beam expander. In the Beam diameter field, enter
the beam diameter at the front lens, i.e. the beam diameter before beam
expander(s) multiplied with the total beam expansion.
To monitor the Doppler signals, right click on Processor, Group 1 or LDA 1
in the BSA Application window, and select System Monitor from the list.
An “always on top” window appears. An oscilloscope-like display will
appear in this window. This shows a number of samples of the filtered and
digitised Doppler bursts.
In addition to the oscilloscope display it includes a Group pane and a
Channel pane showing the anode current of the photo-multiplier(s) and
synchronisation pulses if available.
The panes can be collapsed individually by clicking on the button in their
upper right corner.
4-50 BSA Flow Software: The user interface