CARMA Real Time Displays
Executables for Microsoft Windows and Macintosh are available:
Windows are started with the NewWin menu and replaced by another
window with the Morph menu. A window is a set of set of folders
(often a single folder) containing cells of realtime data. There are no
restrictions on starting multiple copies of a window, a strategy that may
be useful for simultaneously viewing info from different folders of the
same window. The cells have a rectangular outline and contain realtime
data that is refreshed at the same sample interval as the time that is
displayed at the bottom of the window. A question mark indicates that
valid data is not being received by the monitor system. The sample
interval is the same for all cells and can be changed under the Monitor
menu. The history of the values within the cells as a function of time
begins to accumulate when the window is brought up and will store up to a
maximum of 200 samples.
The line at the bottom that displays UT, LST and Local time can be used
to ensure that data are being transferred and the display is alive.
These times are only updated when a new set of samples is received
giving infrequent updates whan a long sample interval is selected. If
data are not being transferred the times will often be replaced with
"Connection stalled". In this event, just kill the window and start
another. The Local time is from the computer running the Java display
and its function is to show that the program is alive locally.
Cell selection plays a role in several menu choices and is accomplished by
a single mouse left-click within the cell. The outline around a cell will
increase in thickness when a cell is selected. A second click in the
selected cell will deselect the cell, as will selecting a different cell
with a left-click. Selection may be moved forward with the Tab key or in
reverse with Shift+Tab. The history of a cell may be displayed in text
form or as a plot by first selecting the desired cell and then selecting List
or Plot in the Monitor menu. The list or plot will then
update as new data are received displaying up to 1000 samples.
The background color for the cells is used to draw attention to unusual
conditions. The general association of colors is:
Red: bad, trouble
Green: busy, moving or good
In addition to graphing cell data as previously described, data from
additional cells may be added to an existing plot with AddToPlot
from the Monitor menu. The new data will be added to the plot that
was last selected (had the focus, as shown by an emphasized title
bar). If no plot window exists or the last selected has been closed, then
the AddToPlot will cause a new plot to be started. The sampling interval
of the data is controlled in the Monitor menu of the parent window.
Invalid data, as indicated by a question mark, will not be plotted,
resulting in discontinuities in the trace. A right-click on a plot will
give many options, including Scaling, Print, Zoom,
and Save. Holding down a left-click and dragging in the plot
defines a rectangle that sets the area to be plotted. The rectangle may
not be correctly drawn if an undate occurs during the drag, but the area
is none the less correctly defined. Traces may only be added to plots from
cells in the same window (including folders) as the cell that originated
the plot. There is currently no way to remove a trace from a plot.
Most cells have audio capability that is disabled by default. If a cell
has a green outline then audio is enabled. Toggling the audio
enable/disable is done by selecting the cell and then clicking the Audio
in the Monitor menu. If the cell does not have audio capabilities
then Audio will not be enabled when the cell is selected (it will be
"greyed out"). Audio is triggered when the cell background is red and
results in a quadruple beep once a minute.
Some of the windows contain tabbed folders that can be selected. The
folders provide a way of selecting part of the data from a window, such as
a single downconverter from a suite of four. Data for all of the folders
in a window are active while the window is active so simultaneous plots
and lists can be mixed from various folders. The keypad can be used to
quickly switch folders; N moves to the next folder and P to the previous.
The File menu allows the current window to be printed to a printer
or file by selecting Print. Selection of Close in this menu
closes the current window while Exit closes all windows within this
Java session and exits the RTD session.
Installation of a local client is an alternative to the web-based RTD for
Windows and Macintosh users. Download the executables from the links below.