BSL PRO 3.7 BSL PRO TUTORIAL
BSL PRO 3.7
BSL PRO TUTORIAL
PC/Windows® 98SE, Me, 2000 Pro, XP
Mac OS X 10.3-10.4
BIOPAC Systems, Inc.
42 Aero Camino, Goleta, CA 93117
(805) 685-0066, Fax (805) 685-0067
info@biopac.com
www.biopac.com
09.21.05
2
Biopac Student Lab
PRO Tutorial
3
Welcome to the Biopac Student Lab PRO!
To learn how the Biopac Student Lab PRO works, complete this interactive Tutorial and read the Overview Chapter of
the BSL PRO Manual. For an in-depth discussion of BSL PRO features and how they can make your work easier, read
further chapters of the BSL PRO Manual.
The BSL PRO Manual (PDF format) is under the Help menu of the BSL PRO application.
The particulars of setup and recording are application specific and are discussed only generally in this Tutorial. For
detailed instructions about setup and recording, consult the BSL PRO Manual and the BSL PRO Hardware Guide—and
follow your particular lesson plans and application notes.
This tutorial demonstrates the use of BSL PRO 3.7 software with the BIOPAC MP35 data acquisition unit.
MP30 users may note different features when using the software with the MP30 unit. Consult the BSL PRO Manual
for information about using BSL PRO 3.7 with the MP30.
All life science applications for the BSL PRO system involve setting up the hardware for acquiring signals (such as
electrodes, leads, and the BIOPAC MP data acquisition unit), setting up BSL PRO software, acquiring data (recording),
and analyzing the data. The purpose of this Tutorial is to familiarize you with the BSL PRO software tools that assist in
acquiring and analyzing your data.
LAUNCH BSLPRO
1.
Click the program icon on the
desktop or in the Programs
(Win)/Applications (Mac)
folder.
•
From the Windows Start
menu, choose Start >
Programs > Biopac Student
Lab > BSL 3.7 >
BSL PRO 3.7.
If not connected to an MP
data acquisition unit, click
OK at the prompt to analyze
saved sample data using
software only.
2.
BSL PRO will open an untitled
graph window. Choose the
menu command File>Close and
proceed to the next step to open
the sample data file used in this
tutorial.
© BIOPAC Systems, Inc.
This tutorial illustrates some of the basic features of the Biopac Student Lab
PRO software, and assumes you have already installed BSL PRO to your hard
drive. (If not, insert the CD and follow the Install Wizard).
When you launch the program on your computer, BSL PRO checks to see if
you have the BIOPAC MP data acquisition hardware connected. If the
software can communicate with the recording hardware, BSL PRO generates
an “Untitled” graph window, ready to record. For this tutorial, choose the
menu command File>Close to close the untitled window, and proceed to the
next step to open the sample file used in this tutorial.
If the BSL PRO software cannot communicate with the MP data acquisition
hardware, you are prompted to “Retry” or to click “OK” to continue and
analyze a saved data file using software only.
You do not need to record data, nor be connected to the MP recording
hardware, to conduct this tutorial. Click OK.
Similarly, you do not need to be connected to MP recording hardware to
analyze any data that you yourself may record and save to disk. This allows
you review a previously saved file and analyze it with the powerful BSL PRO
software on any computer, at home or in the lab, even when that computer is
not connected to the MP data acquisition unit.
www.biopac.com
4
Biopac Student Lab
OPENING A DATA FILE
3.
Choose File>Open.
4.
Navigate to the BSL PRO 3.7
samples folder.
With the default Biopac Student Lab installation, sample data files are located
in the BSL folder:
Win: C\Program Files\Biopac Student Lab\BSL 3.7\BSL PRO 3.7\Samples\
Mac: Drive\Applications\Biopac Student Lab\BSL 3.7\BSL PRO 3.7\Samples\
5.
Open the sample file
4Channel.acq.
The sample data file 4Channel.acq is used in this tutorial. This data file shows
simultaneous recordings of ECG Lead II, Pulse Pressure (PPG). Heart Sounds
(Stethoscope), and Respiration. This setup provides quantitative data on how
the cardiac and respiratory cycles change as metabolic demands on the body
change. You may also review other sample files to familiarize yourself with
BSL PRO applications and tools.
PRO Tutorial
6.
5
Observe the BSL PRO display
and, if needed, adjust the
window so your display
resembles the figure at the
right.
The BSL PRO display consists of a graph window and a Journal. Adjust the
size of the Journal by dragging the bar that separates it from the graph window.
You may resize the entire BSL PRO window to best fit your computer screen
by dragging its corner (or elsewhere on its perimeter).
SAVING A DATA FILE
7.
Save a copy of the sample file,
if desired.
To save a copy, choose
File>Save As and rename the
file, i.e., “4Channel_Test.acq.”
As you practice using BSL PRO tools and commands, you may substantially
alter your sample file. If so, you may choose to close it without saving and then
reopen a fresh working copy to continue the Tutorial.
You may want to practice on a copy of the 4Channel.acq sample file. That
way you can experiment with BSL PRO without worrying about changes you
may make and save to the sample file provided with the software installation.
By default, BSL PRO data files are saved in the BSL PRO format with the
“.acq” filename extension. Saving a file in the BSL PRO format saves the
graph data and the journal notes, the setup parameters (established under the
MP35 menu), and window positions. Except in exceptional cases, you will
save data files in the default BSL PRO format (*.ACQ).
© BIOPAC Systems, Inc.
www.biopac.com
6
Biopac Student Lab
IMPORTANT! Saving as a Graph Template does not save any data—only
the setup parameters.
Part 1: Acquisition
Parameters
Each BSL PRO lesson—including experiments that you may design—will
have unique procedures for attaching electrodes, transducers, and other signal
monitoring equipment. Signal monitoring equipment is connected to the MP
data acquisition unit, and the MP unit in turn is connected to your computer.
Follow the instructions for your particular experiment to set up the hardware.
Before recording, however, you must set data acquisition parameters in the
BSL PRO software.
SET UP CHANNELS
8.
Choose the menu command
MP35>Set up Channels to
generate the Set up Channels
dialog.
Data Input Channels
Analog Input Channels
Digital Input Channels
Calculation Channels
The Set up Channels dialog displays options that determine which channels
receive data, what type of data the channels receive, and how data is displayed
and interpreted on your computer.
Analog Input Channels are the most common type of channel and are used to
acquire any data with “continuous” values. Examples of this include nearly all
physiological applications where input devices (transducers and electrodes)
produce a continuous stream of varying data.
• BSL PRO records and displays up to four analog signals from devices
connected to analog input ports on the front of the MP35 acquisition unit.
PRO Tutorial
9.
Note the three kinds of data
input channels and read about
them at right.
7
Digital Input Channels, in contrast to analog input channels, collect data from
signal sources with only two values, such as on/off devices. Digital channels
are used, for example, in studies of stimulus response patterns and reaction
time to log signals from push-button switches, auditory/visual stimulus
devices, and timing devices.
• BSL PRO records and displays up to eight digital signals from devices
connected the I/O port on the back of the MP35 acquisition unit.
• MP30 Users: The MP30 cannot record digital channels. Consult the BSL
PRO manual for information about setting up trigger and control devices.
Calculation channels transform data in some way (rather than collect external
data as input channels do). Calculation channels acquire data from other
channels. The original source data is not altered—it is mathematically
transformed and stored in a modified form in the new calculation channel.
• For example, if you wanted to know the difference between CH1 and CH2
data for every point of data collection, you could set up a calculation
channel to acquire the data from those two analog channels and plot a
waveform of the difference.
• Up to 12 calculation channels can be configured. This allows for complex
calculations to be performed that involve two or more calculation
channels, such as filtering ECG data and then computing BPM.
Channel Specification Options
10. Note the three checkbox
settings for each channel that
determine whether a channel
acquires data, whether the data
is plotted as a waveform on the
screen, and how the data values
themselves may be optionally
displayed.
Acquire Data
Plot on Screen
Acquire Data records data into memory via the selected channel, but the data
will not be displayed unless you also select “Plot on Screen.”
Plot on Screen displays the recorded data on screen so you can view the
waveforms.
• In some cases you may not want to plot data on the screen. For example,
you may want to acquire data on an input channel and run a calculation
function before displaying it on screen. In that case, you would select
“Acquire Data,” but not “Plot on Screen” for the Input Channel, and
“Acquire Data” and “Plot on Screen” for the Calculation Channel.
Enable Value Display
Enable Value Display allows incoming data values to be displayed
numerically and/or in “bar chart” format in a separate window during
acquisition. Checking this option enables you to open (under the MP35 menu)
a Show Input Values window in which the values are displayed.
• Enable Value Display is useful for tracking slowly changing values such
as heart rate, respiration rate, or the concentration of chemicals in a
© BIOPAC Systems, Inc.
www.biopac.com
8
Biopac Student Lab
substance.
Channel Presets
11.
Click the Presets icon
(down arrow) to the right of any
analog channel label to view a
menu of parameter presets.
12. Press ESC (Escape key) to
close the menu without
selecting a new preset option.
Note the many presets available for data types you may wish to acquire.
View/Change Parameters
13.
Click the View/Change
Parameters icon (wrench) for
Analog Input Channel CH3,
Stethoscope (Heart Sounds).
Clicking View/Change Parameters
generates the Input Channel
Parameters dialog for each channel, which allows specification of settings for
gain, offset, and other recording parameters.
PRO Tutorial
9
14. View the Input Channel
Parameters dialog for CH3.
15. Read about input channel
parameters at right.
Gain
The Channel Preset for CH3 is “Stethoscope (Heart Sounds).” The Channel
Label is the same as the preset name. (A channel’s label is not always the
same as the name of its preset parameters—you will often label a channel
differently to better describe its data.)
Gain specifies the extent to which an incoming signal is amplified. Preset gain
settings are educated guesses for the data type selected and should be used as
initial starting values; you may need to adjust the gain depending on how the
amplified signal appears once data is collected.
Some types of signals (such as EEG) typically need greater amplification
than other types of signals (such as ECG or EMG), although ideal gain
settings are best determined on a case-by-case basis.
To set the gain for a given channel, choose a value from the pull-down menu.
Higher gain results in greater amplification. Setting the gain too high results in
data that is “clipped.” Setting the gain too small results in data that appears
“flatlined.” For the best resolution, establish gain such that the maximum peaks
of the signal are close to the maximum range. Consult the BSL PRO Manual
for a complete discussion of gain.
Offset
Input Coupling
© BIOPAC Systems, Inc.
Offset enables you to correct the offset of an incoming analog signal by adding
or subtracting a constant prior to amplification. The correction is generally
zero, but may be set if a transducer or electrode has inherent offset, a condition
especially true of signals collected in DC mode.
Input coupling is set for the type of signal you are recording. For example,
AC coupling is generally used for biopotential signals such as ECG and EEG,
while DC coupling is best for transducer signals measuring absolute values
such as force, pressure, and temperature. In AC-coupled mode, you may adjust
the upper limit of the bandwidth of the signal being recorded by choosing one
www.biopac.com
10
Biopac Student Lab
of three high pass (HP) filter options.
MP30 Users: In AC mode, there are two high pass and two low pass filter
options to choose from; in DC mode, there are two high pass options.
Scaling
16. Click the Scaling button to
generate the Change Scaling
Parameters dialog.
17. Note the scaling parameter
options and read about scaling
and calibration
at right.
The Scaling button at the bottom of the Input Channel Parameters dialog
generates the Change Scaling Parameters dialog, which allows conversion of
incoming signals into other units (such as ft/lbs, millimeters, liters, etc.).
Scaling allows you to easily translate the voltage read by the MP35 into the
units being measured. Note that, for CH3, Stethoscope (Heart Sounds), the
Units label has been changed to “Volts.”
Calibration is performed prior to acquisition, never while recording.
Input values (Cal1 and Cal2) from a transducer may be calibrated to known
low and high values (i.e., temperature). When an acquisition is performed, data
samples from the selected channel are scaled accordingly and the vertical
(amplitude) scale reflects the rescaled units.
18.
Click Cancel to exit the
dialog without changing
scaling parameters and return
to the Input Channel
Parameters dialog.
Calibration is unique to each application and not demonstrated in this Tutorial.
To calibrate, follow the guidelines of the specific lab lesson or application
note. To read more about calibration, consult the BSL PRO Manual.
PRO Tutorial
11
Digital Filtering
19.
Note the Digital Filters
options of the Input Channel
Parameters dialog and read
about them at right.
The MP35 hardware-based Digital Filters are three cascading, second-order
filters that can be set independently using the pull-down boxes. They are
designed primarily for basic signal conditioning (e.g., removing 60 Hz noise),
rather than for filtering data to retain physiological signals of interest (such as
retaining alpha activity from an EEG signal). Specify a filter type (low pass,
high pass, band pass, or band stop), frequency, and Q setting.
• MP30 users: Digital filters are disabled during High Speed acquisition.
Saving Input Parameters
20. Read about saving input
parameters at right.
21. Click Cancel to exit the dialog
without changing parameters
and return to the Set up
Channels dialog.
Click Cancel to exit the dialog without changing parameters. Choosing OK
sets the input channel parameters, including any changes you may have made.
When you save a data file, all acquisition parameters for every channel are
saved along with the recording. This enables you to open a saved data file and
collect new data without having to reset any parameters.
This feature also enables you to save parameters only—without data—in the
Graph Template file format (.gtl).
A Graph Template contains no recording data, but contains the parameters that
you have set up and saved with the file. When you open the template file, it is
ready to record. This is useful for creating your own lessons. Consult the BSL
PRO Manual to learn more about Graph Template files.
Digital Channel Parameters
Digital channels have only two, fixed values; no parameter and scaling options
are available. For more information, consult the BSL PRO Manual.
Calculation Channel Parameters
Calculation channels acquire data from analog input channels (or digital input
channels, or other calculation channels) and perform a calculation on that data.
The original source data is not altered—it is mathematically transformed and
stored in a modified form in the new calculation channel.
An important concept to understand is that calculation channels are not input
channels. They must ultimately acquire their data from an input channel that
collects signals from an external source. When the source of a calculation
channel is another calculation channel, that calculation channel in turn must
acquire its data from an input channel (usually an analog input channel, though
© BIOPAC Systems, Inc.
www.biopac.com
12
Biopac Student Lab
possibly a digital input channel).
22.
Click the Presets icon
(down arrow) for Calculation
Channel C1 and choose the
preset option ECG R-R
Interval.
For example, you can set up a calculation channel C1 to compute the average
R-R Interval of the ECG data on analog input channel CH1.
To do this, click the Presets icon (down arrow) to the right of Calculation
Channel C1 to generate a menu of calculation channel presets. Choose the
preset option “ECG R-R Interval.”
23.
Click the View/Change
Parameters icon (wrench) to
the right of Calculation
Channel C1 to generate the
Rate Parameters dialog.
24. Note the Rate Parameters for
the ECG R-R Interval
calculation, and read about
them at right.
25. Click Cancel to exit the dialog
without changing rate
parameters and return to the Set
up Channels dialog.
Note the Rate Parameters dialog for the “ECG R-R Interval” preset you
have chosen. The Source data for the calculation is acquired from “CH1, ECG
lead 2” and the Function is to compute the interval in seconds.
Were you to record with these rate parameters, Analog Input Channel CH1
would acquire the ECG data from the subject, and Calculation Channel C1
would in turn compute the R-R Interval of the data collected on CH1.
26.
Click the Presets icon Choosing the “Off” preset option turns off the calculation channel. It will no
of Calculation Channel C1 and longer acquire, plot, nor display data.
choose Off.
27. Click the close box to exit the
Set up Channels dialog and
return to the graph window.
SET UP ACQUISITION
PRO Tutorial
28. Choose the menu command
MP35>Set up Acquisition.
29. Note the acquisition parameter
options of the Set up
Acquisition dialog and read
about them at right.
13
Once you have set up the channels to be acquired, the next step is to set up the
acquisition parameters. The Set up Acquisition dialog displays options that
control, among other things, how and where data will be stored, the sample
rate for data collection, and the duration (length) of each acquisition.
Default acquisition parameters are to Record and Append using PC Memory
at a sample rate of 200 samples per second for 30 seconds.
The three pull-down menus at the top of the Setup Acquisition dialog allow
control over how and where the acquisition data will be saved.
Data Storage Options
Default parameters are set to Record and Append using PC Memory, which
tells BSL PRO to append acquisitions until the file is saved and to store the data
in computer memory (RAM) during the acquisition. Options can be set to save
data once each segment is acquired, to “autosave,” and to utilize the computer’s
hard disk for storage.
Sample Rate
Sample Rate determines how many samples the MP35 will acquire per second,
and is analogous to the mm/sec setting on a chart recorder. Choose the desired
value in the pull-down menu; you may need to scroll up to see higher values.
The default sample rate is 200 samples per second, but the best sample rate will
vary depending upon the nature of the data being acquired.
Acquisition Length
Acquisition Length is set using the scroll bar or entering the length directly
into the value box. Units are set in the pull-down menu to the right. The default
setting is to acquire data for 30 seconds, but length of acquisition will vary
depending upon the experimental design.
The MP35 will stop acquiring data when the specified length is reached. You
may also stop acquisition at any time by clicking on the “Stop” button that is
enabled during recording in the lower right corner of the graph window.
Repeat
30. Click the close box to exit the
Set up Acquisition dialog and
© BIOPAC Systems, Inc.
The Repeat option allows you to acquire data from repeated trials using the
same parameters for each trial.
Consult the BSL PRO manual for more information about acquisition
parameters.
www.biopac.com
14
Biopac Student Lab
return to the graph window.
TRIGGERING, OUTPUT CONTROL,
AND OTHER MP35 MENU OPTIONS
31. Click on the MP35 menu and
view other available
commands. Read about them at
right.
parameters.
Note the options on the MP35 menu and read about some of them below.
• MP30 Users: MP30 menu commands differ from those available for the
MP35. Consult the BSL PRO Manual for more information.
Set up Triggering allows you to start an acquisition “on cue” from a trigger
device connected to the MP35 unit.
Show Input Values opens a window that displays input data in numerical
format as it is being acquired. (This function is enabled only when the “Show
Input Values” option for a channel is enabled in the Set up Channels dialog).
Output Control generates a submenu of Output Controls. The MP35 outputs
signals via ports on its back panel. To output analog signals, use the “Analog
Out” port; to output digital signals, use the “I/O” port.
•
Available output controls for the MP35 are CH3 to Output, Digital
Outputs, Pulses, Voltage, Stimulator-BSLSTM, and StimulatorSS58L. Consult the BSL PRO Manual for more information.
Once you have set up the input channels and set up the acquisition parameters,
you are ready to record. To acquire data, the MP unit must be connected to
32. Read about recording a data file your computer and powered on. (If the MP35 is not properly connected and
at right.
communicating with your computer, you will be unable to record and receive
an error prompt.)
Part 2: Recording
If the MP35 unit is not
connected, read about
recording at right and proceed
to the following section.
33. If the MP35 data acquisition
unit is connected, practice
recording a new data file.
Recording a file is beyond the scope of this tutorial, other than to practice
acquiring a few segments of “flatline” practice data.
•
To acquire useful data, electrodes, transducers and other devices must be
in place to collect signals from your subject. If no input devices (e.g.
electrodes or transducers) are connected to the MP35 acquisition unit, but
the MP35 is connected to the computer, the unit will collect—and BSL
PRO will display—a small, “flatline” value of random signal “noise” with
a mean of about 0.0 Volts.
If the MP35 unit is connected, choose File>New to open an “Untitled” graph
window and practice recording data. If no MP unit is connected, read about
recording below and proceed to the following section of this tutorial.
• Choose File>New to open an
Start acquisition by clicking the Start button in the lower right
“Untitled” graph window and
corner of the graph window, or by pressing “Alt + Spacebar.” The circle next
practice recording.
to the Start/Stop button, when green and solid, indicates that the MP35
hardware is communicating with the computer, ready to record.
• Use the Start/Stop button in
the graph window to acquire
multiple, short segments of
“flatline” practice data.
• Use the Rewind button in the
Toolbar to delete a data
segment.
• Choose File>Close to close
the practice graph without
saving.
Once an acquisition has started, the Start/Stop button in the graph window
changes to Stop. The two opposing arrows to the right of the button indicate
that data is being collected. The “Busy” status light on the front of the MP35
also indicates that data is being collected.
Stop an acquisition at any time by clicking the Stop button, or
by pressing “Alt + Spacebar.” An acquisition automatically stops when it
reaches the Acquisition Length parameter in the Set up Acquisition dialog.
In the default Append mode, BSL PRO can record multiple segments in a
single file. Simply “Start” again to append another recording segment. An
PRO Tutorial
15
append marker indicates the beginning of each new recording segment.
The Rewind button on the Toolbar deletes the last recorded segment.
You cannot change acquisition parameters while recording. If you change
acquisition parameters during a pause between recording segments, when you
attempt to start recording again, BSL will warn that your previous data will be
overwritten (unless the “Warn on Overwrite” option in the MP35 menu is
disabled). Similarly, deleting a recorded segment with the Rewind command
will generate a warning.
After recording multiple short segments, choose File>Close to close the
practice data window without saving.
Recording is unique to each application. Follow the recording guidelines for
your specific lab lesson, experiment, or application note. To read more about
recording, consult the BSL PRO Manual.
Part 3: Display
The BSL PRO graph window is designed to provide you with a powerful yet
easy-to-use interface for viewing and manipulating data.
34. Note the features of the BSL
PRO display in the labeled
figure at right.
The Biopac Student Lab PRO Display
CHANNELS
Selecting Channels
35. Note the four channels of data
in the display of sample file
4Channel.acq.
36. Click the CH2 channel
number box (or its “PPG”
label to the left of the
waveform) to make it active.
© BIOPAC Systems, Inc.
The 4Channel.acq sample file contains four different types of data, each in its
own channel with a border between each waveform display. To the left of each
waveform is a channel label, color-coded to help identify each waveform: ECG
Lead 2, PPG (Pulse Pressure), Stethoscope (Heart Sounds), Respiration.
In the upper left of the graph window, a row of small, numbered boxes
indicate the acquired channels. The color for each channel’s waveform,
label, and indicator box correspond and can be changed. The box on the
left corresponds to the waveform at the top of the screen.
www.biopac.com
16
Biopac Student Lab
left corresponds to the waveform at the top of the screen.
The box that appears depressed is the selected, or “active,” channel. The label
of the active channel is displayed to the right of the channel number boxes and
is highlighted in the graph window to the left of the waveforms.
To make a channel active, select its channel number box or its label with the
arrow tool. Only one channel can be active at a time. In the example shown
here, Channel 2 (PPG) is active.
Transformations and editing operations generally apply to the active channel,
though in some cases, to multiple channels. Measurements can be taken from
any channel, whether active or not.
Hiding channels
37. Hold down the Ctrl key
and click on the CH2 PPG
channel number box to hide the
channel.
To focus on one channel, it is sometimes helpful to temporarily “hide” another.
To hide a channel, click on that channel’s number box while holding down
the Ctrl (Control) key. The channel’s number box is crossed-over and the
display redrawn without this channel. Pressing Ctrl and clicking the channel’s
number box again causes the waveform to reappear.
38. Hold down Ctrl and click again You can hide multiple channels. Hiding an active channel makes the following
visible channel become active. Note, though, that a hidden channel can be
to make it reappear.
made active (even while hidden) by clicking its channel number box.
SCALE
Adjust Vertical Scale
39. Adjust the Vertical Scale of
CH1.
• Click in the vertical scale
region of the channel to
generate the Vertical Scale
dialog.
• Change the scale range to
one-half of its current value.
• Click OK to set the new scale
and close the dialog.
• Observe the rescaled
waveform in the graph
window.
The vertical scale at the right edge of the graph window displays the
amplitude units and range for each channel.
40. Repeat the previous step to
adjust the vertical scale of
CH2, CH3, and CH4.
You can independently adjust the vertical scale of each waveform. Click
the mouse in the vertical scale region corresponding to that waveform’s
channel to generate a vertical scale dialog. Type in scale values that result in a
scale range about half the current value and click OK. The waveform's screen
amplitude should now be about twice as large as it was before.
• Note: When grids are locked, the scale dialog includes grid settings. When
grids are not locked, the dialog includes scale settings only. Refer to the
discussion of Grid Options later in this tutorial.
41. Select each channel’s
After changing the vertical scale, use the vertical scroll bar to adjust the
PRO Tutorial
waveform and use the vertical
scroll bar to adjust the
midpoint of each.
17
midpoint of each channel. The scroll bar acts independently upon each
channel; you must select the channel first.
Adjust Horizontal Scale
42. Adjust the Horizontal (Time)
Scale of all waveforms.
• Click in the horizontal scale
region to generate the
Horizontal Scale dialog.
• Change the scale range to one
half of its current value.
• Click OK to set the new scale
and close the dialog.
• Observe the rescaled
waveform in the graph
window
The horizontal scale affects all
channels.
You can adjust the horizontal scale to any range to compress or expand the
displayed waveforms along the horizontal (time) axis. The horizontal scale
affects all channels.
Click in the horizontal scale region to generate the horizontal scale dialog.
Type in an upper range value that is about half the current value and click OK.
The horizontal scale of all waveforms should now be about twice as large as it
was before.
• Note: When grids are locked, the scale dialog includes grid settings. When
grids are not locked, the dialog includes scale setting only. Refer to the
discussion of Grid Options later in this tutorial.
43. Use the horizontal scroll bar
to scroll to the beginning and
end of the recording.
Adjusting horizontal scale allows you to magnify the screen display to better
examine a waveform, but note that the waveforms may no longer fit in the data
window. The file, however, contains the complete record even if all data is not
displayed on the screen.
To view the beginning of the recording (time zero), scroll left with the
horizontal scroll bar. To view the end, scroll right. The horizontal (time)
scale along the bottom of the graph window denotes when the data was
recorded relative to the beginning of the acquisition.
AUTOSCALE
Autoscale commands determine the optimal scale for waveforms and center
their display.
Note: Once waveforms are optimally scaled, repeating an autoscale
command has no apparent effect. As needed to practice autoscale
commands, individually adjust the scale of each channel as you have done
in prior steps and scroll midpoints away from center.
© BIOPAC Systems, Inc.
www.biopac.com
18
Biopac Student Lab
Autoscale Waveforms (Vertical)
44. Select a channel.
45.
Click the Vertical
Autoscale icon in the Toolbar
at the top of the graph window
to optimize the vertical scale of
the selected waveform.
46. Right-click in another channel
to select it, and choose
Autoscale from the pop-up
menu to optimize the vertical
scale of that selected
waveform.
Note the graph display of the waveform before and after autoscaling.
To optimize the vertical scale of an individual channel, select the channel
and click the Vertical Autoscale icon in the Toolbar at the top of the graph.
• Shortcut: right-click to select a waveform and choose Autoscale from the
pop-up menu.
47. Choose Display>Autoscale
Waveforms to optimize the
vertical scale of all waveforms.
To optimize the vertical scale for all channels and center the waveforms
vertically, choose the menu command Display>Autoscale Waveforms.
Autoscale Horizontal
48. Choose Display>Autoscale
Horizontal to optimize the
horizontal (time) scale of all
waveforms.
49. Choose Display>Autoscale
Waveforms (Vertical) again.
Note that the entire recording is
displayed.
Choosing Autoscale
Horizontal and then Autoscale Note the graph display of all waveforms before and after autoscaling.
Waveforms from the Display
menu is the standard way to
quickly and easily display the
entire recording.
To optimize the horizontal scale for all waveforms and make all the data
visible in the graph, choose the menu command Display>Autoscale
Horizontal. This sets the horizontal (time) scale range to start at 0 (beginning
of acquisition) and end at the end of the recording. The entire recording is
PRO Tutorial
19
displayed.
• Shortcut: click on the Horizontal Autoscale
icon in the Toolbar at
the top of the graph window.
GRIDS AND GRID OPTIONS
50.
Toggle the Grid icon in
the Toolbar to “show” grid
lines.
51. Right-click in the waveform
region and choose Grid
Options from the pop-up menu
to generate the Grid Options
dialog.
52. Note the available grid options.
Toggle the option Show minor
division and click OK to view
changes in the display.
Note that the option to “Lock
grid lines” affects grid display.
53. Right-click in the waveform
region to generate a pop-up
menu, and deselect Grid to
“hide” the grid lines.
The Grids icon on the Toolbar “shows” or “hides” grids. Alternately,
choose the Display>Show>Grid, or right-click in the waveform region and
select or deselect Grid.
Display>Show>Grid Options generates the Grid Options dialog, with
settings that control the display and locking of grid lines. Alternately, rightclick in the waveform region and choose Grid Options.
Note that the “Lock grid lines” option can affect the grid display. In general,
“Unlocked” grids can help you view the data display on the monitor, while
“Locked” grids can help with printing. See the BSL PRO Manual for more
information about grids and grid options.
When grids are “locked,” the scale dialog options include grid settings. When
grids are “unlocked,” scale dialogs include scale options only,
as shown in these two screen shots
of the vertical scale dialog. Refer to
the discussion of Scale earlier in this
Tutorial.
© BIOPAC Systems, Inc.
www.biopac.com
20
Biopac Student Lab
MARKERS
54. Read about markers at right.
Markers are used to identify important data points in a recording so they can
be referenced later. For instance, you may want to note when an experimental
condition began or when an external event occurred so you can examine any
possible reaction. Marker labels help reference these data locations.
The marker that is active (selected) is colored and its label displayed.
Append Markers
Event Markers
Append markers are displayed in the marker region above the marker label
box. They are automatically inserted by BSL PRO 3.7 to mark the beginning of
recording segments.
Event markers are displayed below the marker label box. They are
manually inserted during or after recording.
To insert an event marker during recording, press the F9 (Win) or Esc
(Mac) key and enter a label in the marker label text box. This enters a
marker at exactly the time the key is pressed.
To insert an event marker after recording, click with the Arrow tool in
the event marker region above the data point to be marked and enter a label
in the marker label text box.
Marker Tools
Marker Preferences
55.
Toggle the Markers icon
on the Toolbar to hide and
show the marker region of the
graph window.
56. Add and label a new event
marker in the event marker
region.
Marker Tools are located at the right of the marker region. Use the
tools to jump through the markers or generate a menu that allows you to search
for specific markers, to manage markers, to paste a summary of markers to the
Journal, and to generate a dialog to set Marker Preferences.
The Markers icon on the Toolbar activates the marker display region
near the top of the graph window. Alternately, you may choose the menu
command Display>Show>Markers.
Note: Not all sample files included with BSL PRO include append markers,
but all files you create with the software will include automatic append
markers at the beginning of each recorded segment. Consult the BSL PRO
Manual for more information about markers.
To add a new event marker, click with the Arrow tool above the data point
you wish to mark, in the space between the bottom of the marker label box and
the top of the graph.
Enter a new marker’s label by typing in its activated label
text box.
You may change an active marker’s label by entering new text in its label box.
(Clicking on an existing marker with the Arrow tool selects that marker and
makes it active.)
57.
Use the Marker
Tools to move through the
Use the Marker Tools right and left arrows to move through the markers.
Move to the marker you added in the previous step. When active (selected), it
will be colored and its label displayed
PRO Tutorial
markers and activate the event
marker that you added in the
previous step.
58.
59.
21
will be colored and its label displayed.
The marker that you added is a yellow-colored inverted triangle, as it is an
event marker that you added to the recorded file.
Click the Marker
Tools down arrow to generate
a pull-down menu. Choose
Clear>Active Event Marker
The Marker Tools down arrow generates a menu and submenus of marker
to delete the marker that you
commands. Use the Clear>Active Event Marker command to clear the event
activated
marker that you added and activated in previous steps. Take care that you have
in the previous step.
activated the marker you wish to clear, as you may not undo this command.
Click the Marker
Tools down arrow and choose
Preferences to generate the
Marker Preferences dialog.
Click the Marker Tools
down arrow and choose
Preferences to generate
a Marker Preferences
dialog. Alternately,
choose File>
Preferences>Markers.
Marker Preferences has
three tabs of options to
auto-label markers, and one to format marker data summarized to the Journal.
60. Click through the tabs of the
Marker Preferences has tabs that allow you to pre-establish custom labels
Marker Preferences dialog to before recording that are entered when a marker is inserted during recording.
note the options available for
Custom labels (rather than the default labels “Segment 1,” “Segment 2,” etc.)
configuring custom marker
labels, and for pasting a marker can be pre-established for the append markers that are automatically inserted
at the beginning of each new recording segment.
summary to the Journal.
Custom labels, either fixed or sequential, can be pre-established for event
markers that are inserted with the press of a function key while recording.
This can help you enter markers with descriptive labels during recording at
exactly the moment an event occurs, when you otherwise might not have time
to label your markers.
Note also the Preferences tab that sets format and sort options for marker
summaries that you may paste to the Journal.
© BIOPAC Systems, Inc.
www.biopac.com
22
SELECTION TOOLS
Biopac Student Lab
When working with data, you will use one of three selection tools: Arrow, IBeam, and Zoom.
Selection Tool icons are located in the lower right corner of the display
window. Click on an icon to activate the tool indicated for the editing or
analysis function to be performed. Selection tools may also be activated by
choosing the menu command Display>Cursor Style.
You will often use the Zoom tool and I-Beam tool to select a portion of a
waveform to edit or analyze. Once you have selected (highlighted) an area,
you can perform a variety of operations—such as editing, measuring, or
transforming data.
Arrow Tool
61. Select the Arrow tool in the
lower right corner of the graph
window.
62. Use the Arrow tool to resize the
chart boundaries between
waveforms.
63. Choose Display>Reset Chart
Display to return the display to
equal sized waveform “tracks.”
The Arrow tool is a general-purpose cursor that is used to select a
waveform or channel, scroll through data, adjust chart boundaries between
waveforms, select options from pull-down menus, etc. All other cursors
default to the arrow style when moved outside of the waveform region.
You may use the Arrow tool to adjust chart boundaries
and better view a waveform’s “track.” Position the
Arrow tool over a boundary line between waveforms.
When the cursor changes style, drag to resize the track
of that waveform. (The I-Beam tool similarly changes
style and can be used to adjust chart boundaries.)
Choose Display>Reset Chart Display to evenly
display the waveform “tracks” in the graph window.
I-Beam Tool
64. Select the I-Beam tool in the
lower right corner of the graph
window.
The I-Beam tool is used to select an area of a waveform (or multiple
waveforms) to be edited, measured, or transformed.
Clicking and dragging the I-Beam tool across waveforms selects and
highlights an area of data. You can perform a variety of operations—editing,
65. Click and drag the I-Beam tool measuring, transforming, copying, pasting measurements to the Journal—on
across the waveforms to select the selected data.
an area of data.
As you scroll though waveforms with the I-Beam tool and highlight areas of
66. Click the I-Beam tool in the
data to be measured, note that the values in the channel measurement boxes
waveforms—without
above the graph window adjust themselves continuously.
dragging—to select a single
It is important to note, even without dragging, that the I-Beam tool always
data point.
selects at least one sample point. If a single point is selected, the cursor will
“blink.” If multiple points are selected, the area will be highlighted.
PRO Tutorial
23
Zoom Tool
67. Select the Zoom Tool in the
lower right corner of the graph
window.
68. Click, drag, and release the
Zoom tool in a waveform to
select and magnify a section of
data.
69. Zoom again.
70. Choose Display>Zoom Back,
or press “Ctrl –” (Control +
Minus keys), to undo the
previous Zoom command.
The Zoom tool magnifies a portion of any wave for examination.
Click on the waveform with the Zoom tool in the area you wish to examine, or
hold the left mouse button and drag the Zoom tool so it forms a box over the
desired area. Then release the mouse button to display the enlarged area.
The Zoom tool magnifies all waveforms. You may want hide other channels to
focus on the channel you wish to zoom in on.
You may “undo” previous zooms (up to 5) by choosing Display>Zoom Back,
or by pressing “Ctrl –” (Control + Minus keys).
71. Choose Display>Autoscale
Horizontal and Display>
Autoscale Waveforms to
center all waveforms and
display the entire recording.
Choosing Autoscale Horizontal and then Autoscale Waveforms (Vertical)
from the Display menu is the standard way to quickly and easily return to
a display of the entire recording.
MEASUREMENTS
Using the BSL PRO measurement tools, you can easily use absolute
functions—such as value, X-axis (time) and samples—that measure a single
point, and use functions—such as min, max, mean, and ∆ Time—that operate
over a selected, highlighted area of data.
Measurement features can be automated so that measurements are taken and
pasted into the Journal file when a specific event occurs, or at pre-specified,
user-defined time intervals. Functions under the Transform menu (such as Find
Peak) identify specific events based on a variety of threshold and window
discriminators.
Measurement Boxes
72. Read about measurement
boxes at the right.
The measurement region is located near the top of the graph window. For
each measurement, there are pull-down boxes that specify the channel to be
measured and type of measurement, and a value box that displays the results.
To specify the channel to be measured, click on the channel selection box
and choose from the pull-down menu. When the designation “SC” is chosen
(default), measurements are taken from the channel that is active, or
© BIOPAC Systems, Inc.
www.biopac.com
24
Biopac Student Lab
“selected,” in the graph window.
To specify a measurement type, click on the measurement box and choose
from the pull-down menu.
Measurement results are displayed in the box to the right of the
measurement type. Results reflect the waveform data selected in the graph
window with the I-Beam tool.
Taking Measurements
73. Note the measurement boxes
in the 4channel.acq sample
file.
As you drag the I-Beam tool
across waveforms, note the
change in values in the channel
measurement boxes.
The sample file 4Channel.acq displays five measurement boxes in the region
below the Toolbar. The first is configured to measure CH1 delta, the second
to measure CH1 BPM, the third CH3 Peak-to-Peak, the fourth CH4 ∆ Time,
the fifth CH4 Peak-to-Peak.
If all five measurement boxes are not displayed, drag the window wider.
The measurements adjust themselves continuously as you scroll through the
waveforms with the I-Beam tool, reflecting the area of data highlighted in the
graph window.
It is important to note that the I-Beam always selects either a single point or
an area spanning multiple sample points. When a single point is selected,
the cursor will “blink.” When multiple points are selected, the area will be
highlighted. If an area is defined and a single point measurement is selected,
such as X-axis T (Time), the measurement will reflect the last selected point.
74. Hide CH1 and CH2.
To hide channels, hold the Ctrl key and click their channel number boxes.
• Hiding a channel removes its waveform from the graph display.
• A hidden channel can remain the active channel.
In the following exercise we will observe the results in the three measurement
boxes that are configured for CH3 p-p, CH4 delta T, and CH4 p-p. If all the
measurement boxes are not displayed, drag the window wider.
75. Compare the p-p measurements To practice taking measurements, select and compare eight seconds of “Deep
Breathing” data with eight seconds of “After Exercise” data.
for CH3, Stethoscope and
CH4, Respiration during the
“Deep Breathing” and “After
Exercise” segments of the
recording.
• Using the I-Beam tool, select
8 seconds of data in the
“Deep Breath” segment.
Note the p-p measurement
results in the measurement
boxes for CH3 and CH4.
• Choose Edit>Journal>
Paste Measurement.
Read the measurement results
that have been pasted into the
Journal.
Labeled markers identify the data segments for each condition. When
selecting an area of each segment with the I-Beam tool, note the CH4
delta T measurement to determine 8 seconds of data.
PRO Tutorial
25
• Select 8 seconds of data in
the “After Exercise” segment.
Note the p-p measurement
results in the measurement
boxes for CH3 and CH4.
• Choose Edit>Journal>
Paste Measurement.
Read the measurement results
that have been pasted into the
Journal.
In the Analysis and Journal
sections of this Tutorial, you
will learn more about taking
measurements and pasting
measurement data to the
Journal.
Compare the Peak-to-Peak measurement results for CH3, Stethoscope
(Heart Sounds) and for CH4, Respiration under each condition.
The menu command Edit>Journal>Paste Measurement pastes each
measurement to the Journal. Review the Journal entries shown below.
If the Journal is not displayed, toggle the Journal icon in the Toolbar.
Part 4: Analysis
ANALYSIS OVERVIEW
One advantage of saving data files to disk is that you can quickly and easily
perform post-hoc analyses of your recorded data. BSL PRO software is a
powerful and flexible analytical tool designed to provide you with immediate
feedback from each operation. Using BSL PRO, you are able to...
•
•
•
•
•
•
•
Use digital filtering and smoothing.
Find patterns within data sets.
Automatically find peaks and calculate rate data.
Perform mathematical and statistical operations.
Log results and observations to a journal.
Mark events during acquisition or analysis.
Transform data after it has been acquired.
To get an idea of how BSL PRO provides immediate feedback, run a Find
Peak function on the 4Channel.acq sample file.
76. Adjust the display of the sample Select CH1 and hide the other channels by pressing Ctrl and clicking their
file 4Channel.acq to view ten
channel number boxes.
seconds of ECG data.
Use the Zoom tool to examine a 10-second portion of the waveform. To center
• Select CH1, ECG.
your display after zooming, use the Autoscale Waveforms (Vertical)
command from the Toolbar or from the Display menu.
• Hide other channels
• Zoom in on about ten
seconds of data
• Autoscale the waveform as
needed.
77. Use the I-Beam tool to select
one ECG cycle, as shown in the
© BIOPAC Systems, Inc.
www.biopac.com
26
Biopac Student Lab
screen shot at right.
78. Choose Transform>Find Peak Note the settings in the
Find Peak dialog.
to generate the Find Peak
BSL PRO
dialog.
automatically
79. Choose the Off-line Averaging
calculates a threshold
option (in the bottom third of
level based upon a
dialog).
percentage of the peak
80. Set the first cursor to “Peak +
in the selection of data
(-.45) sec” and the second
that you highlighted.
cursor to “Peak + (+.45) sec.”
Choose Off-line
Averaging, and set
the first and second
cursors relative to the
peak.
81. Click the “Ave Start” button.
BSL PRO runs through the data and
generates a new window showing the
average ECG for the entire recording.
You may also set Find Peak to average
a selected portion of the recording.
This feature is useful when comparing
the ECG complex during different
sections of an experiment.
82. Close the Averaging result
window without saving and
return to the graph display
window.
PRO Tutorial
27
The Transform menu contains a number of
functions that modify waveform data.
THE TRANSFORM MENU
83. Scroll through the options
under the Transform menu
command and note the
available functions.
The Digital Filter sub-menu has both FIR and
IIR types of filter operations. For most datasets,
the default filter parameters may be used and will
produce relatively robust results.
The Math Functions sub-menu lists several
available mathematical transformations. Some
transformations produce a dialog with parameters
that can be changed.
The Template Functions sub-menu provides a
host of options to examine the relationship
between two different waveforms.
The Integral transformation results in a running
total of all selected waveform values (using a
trapezoidal rule integration).
The Derivative transformation approximates an ideal differentiator. It allows
you to specify a low pass frequency to filter the data prior to performing the
derivative. The Difference transformation is a running subtraction over the
number of points specified.
The Expression option has an “Equation Generator” that lets you perform a
range of mathematical operations, from addition and subtraction to arcsine and
log transformations. You can perform complex operations in a single step. For
example, you can compute the mean of several channels, and then use the
arcsine function to transform the result and save the output to a new channel.
You can transform entire waveforms or sections of waveforms.
TRANSFORM>FIND RATE
In addition to performing mathematical functions, the BSL PRO software can
search for peaks and calculate rate. The Find Rate function will calculate rate
information for a variety of cyclical data, including BPM, Hz, peak max, peak
min, P-P, area, and mean.
For example, suppose you want to calculate BPM for the entire ECG
waveform once it has been collected.
84. Select CH1, ECG.
85. Choose Transform>Find
Rate.
86. Select the function Rate
(BPM).
87. Check to enable “Find rate of
entire wave.”
© BIOPAC Systems, Inc.
To do this, select CH1 and choose the menu
command Transform>Find Rate to
generate the Rate Detector dialog. View
the functions available on the pull-down
menu and choose Rate (BPM).
Note the other options allowing you to
customize the Rate calculation. The Rate
Detector can operate as a simple threshold
detector or can include more sophisticated
parameters such as noise rejection and
windowing.
www.biopac.com
28
Biopac Student Lab
88. Click OK.
BSL PRO calculates the rate
and displays its graph.
89. Note the new CH5 Rate
channel that has been added to
the graph window.
BSL PRO calculates the
threshold values and computes
the rate for the entire
waveform. The rate is charted
and added to the current graph
window. Options enable you to
limit the transformation to a
selected area, and to display the
rate graph in a new window.
90. Remove the new channel
selecting CH5 and choosing
Edit>Remove Waveform.
To remove a channel from a file, select it and choose Edit>Remove
Waveform. Take care to select the channel you wish to remove, as you may
not undo this command.
Transform>Histogram
A related type of transformation is the histogram, which allows you to display
data in summary format and examine the central tendency characteristics and
variability within a waveform.
91. Select CH1, ECG.
Choosing Transform>Histogram
generates the Histogram Options
dialog. The dialog prompts you to enter
the number of “bins” to sort the values
into, and (if you do not accept the
default “autorange”) to enter the upper
and lower bounds of the data to be
sorted. Type “50” in the bins entry and
click OK.
92. Choose
Transform>Histogram.
93. Set the bins value to “50.”
94. Click OK.
95. Close the Histogram graph
window without saving.
The resulting waveform is generated in
a new graph window and should
resemble the histogram plot shown
here.
96. Show all four channels of the
4channel.acq graph.
Return to the 4Channel.acq graph window. “Show” channels that are hidden
by holding the Ctrl key and clicking their channel number boxes.
DISPLAY MODES
BSL PRO offers a number of display options, including Scope, Chart, X/Y
Plot, and Overlap Segments. Chart is the default display mode.
You can switch from one display mode to another using the Toolbar icons in
the upper left hand corner of the window. By clicking on these icons, you can
alternately have your display emulate a chart recorder (Chart mode),
oscilloscope (Scope mode), or plot data from one channel against data from
another channel. (X/Y Plot Mode).
Overlap Segments display is useful for comparing the waveforms of appended
segments. The icon for this mode is enabled only in data files with multiple,
appended recording segments. (Overlap Segments mode is not enabled in the
sample files included with BSL 3.7.) Consult the BSL PRO manual for more
information about display modes.
PRO Tutorial
97.
Click on the Scope display
mode icon.
• Choose Display>Tile
29
The Scope display mode emulates an oscilloscope. All waveforms are in a
single window with no borders between channels. Waveforms can overlap.
Display menu options determine the display of waveform data.
Waveforms
• Choose Display>
Overlap Waveforms
• Choose Display>
Autoscale Waveforms
• Hide CH1 and CH2.
• Analyze the CH3 and CH4
waveforms.
98.
Click on the X/Y Plot
display mode icon.
• Set the X-axis to
“Respiration.”
• Set the Y-axis to
“Stethoscope.”
Analyze the relationship between CH3, Stethoscope (Heart Sounds) and
CH4, Respiration. Note the differences between the “Deep Breath” and
“After Exercise” data segments.
X/Y Plots are useful for respiration studies, vectorcardiograms, and
investigations into non-linear dynamics.
In X/Y display mode, the X-axis and Y-axis labels correspond with the
channels that are being plotted. To set the axes, click on the labels and choose
the channel to plot from the pull-down menu.
In X/Y display mode, the I-Beam tool becomes a cross hair. When scrolled
across the graph window, the X-axis and Y-axis values are displayed in the
measurement region above the graph window.
function is
In X/Y display mode, the icon for the Plot Standard Curve
enabled in the Toolbar; it generates a dialog that enables you to enter values
for colorimetric studies.
99.
Return to the Chart
display mode, show all
channels, and autoscale
waveforms.
© BIOPAC Systems, Inc.
Click on the Chart display icon to return to Chart mode. Show any hidden
channels by holding the Ctrl key and pressing their channel number boxes.
Choose Autoscale Horizontal, then Autoscale Waveforms to optimally scale
and center all waveforms.
www.biopac.com
30
Biopac Student Lab
Part 5: Journal
100.
Toggle the Journal icon
on the Toolbar to hide and
show the Journal region of the
display.
101. Adjust the size of the Journal
region by dragging the
boundary that separates the
Journal from the graph window.
The Journal is a text editor built into the BSL software that allows you to
record notes and data at the same time you are acquiring and analyzing data.
Journal entries are saved with the BSL PRO data file. You can copy
measurements and wave data (in numeric format) from the graph to the
Journal, and export Journal data to other programs for further analysis.
Toggle the Journal icon on the Toolbar to display the Journal region.
Alternately, choose the menu command Display>Show>Journal.
You may adjust the size of the Journal display with the mouse by dragging the
boundary bar that separates the Journal from the Graph window.
JOURNAL TEXT ENTRY
102. Place the cursor at the
beginning of the Journal
and type your notes.
Type any notes you want directly in the Journal. Your keystrokes are entered
where the cursor is placed. The Journal accepts standard keyboard text entries
(except certain keystroke combinations reserved for BSL PRO functions.)
PRO Tutorial
JOURNAL TIME AND DATE TOOLS
Time, Date, AutoTime
31
Time, Date, and AutoTime tools are in the top left corner of the Journal
window. They record the time and/or date directly into the Journal.
• Time and date are entered according to your computer’s system clock and
calendar. If incorrect, check your system settings.
103. Enter a time stamp.
Once the cursor is placed in the Journal, click the Time tool (clock icon.)
• Place the cursor at the end of The current time is entered at the cursor point.
existing journal entries.
•
Click the Time tool
(clock icon) to enter a time
stamp.
• Review the Journal.
104. Enter a date stamp.
Once the cursor is placed in the Journal, click the Date tool (calendar
• Place the cursor at the end of icon.) The current date is entered at the cursor point.
existing journal entries.
•
Click the Date tool
(calendar icon) to enter a
date stamp.
• Review the Journal.
105. Activate the AutoTime tool
and enter time stamps.
•
Click the icon to
activate AutoTime.
• Place the cursor where you
want the time stamp to be
inserted.
• Press the Enter key.
• Press the Enter key again.
• Review the Journal.
•
Click the AutoTime tool (clock icon with arrow – upon activating, the
icon will appear depressed). Then, place the cursor in the Journal and press the
Enter (Return) key.
If the AutoTime tool is activated—and if the cursor is positioned in the Journal
text region—the current time is entered each time you press the Enter key.
• To reset the Enter key to its normal “Return” function in the text editor,
toggle the AutoTime icon again.
The AutoTime function records the time at the instant the Enter (Return) key
is pressed. This is very useful for entering time stamps during recording while
data is being collected.
Click the icon again to
deactivate AutoTime.
PASTE MEASUREMENTS TO THE
JOURNAL
Set Journal Preferences
106. Choose the menu command
File>Preferences>Journal to
generate the Journal
Preferences dialog.
Journal Preferences options control how measurements and wave data are
formatted, when pasted directly from the graph window to the Journal using
the Edit>Journal submenu commands
You can also set general text options for the Journal in Preferences. To set the
text word wrap option, right-click anywhere in the journal text entry region.
107. Review the options that
determine how measurements
and wave data are pasted into
the Journal.
© BIOPAC Systems, Inc.
www.biopac.com
32
Biopac Student Lab
108. Check that all Measurement
Paste Options are selected, as
well as the “Include time
values” option of the Wave
Data Paste Options.
109. Click OK to accept any
preference option changes.
For this tutorial, select all
of the measurement and
wave data paste options so
when you paste data to the
Journal you can easily
identify them.
When you plan to export
measurements and data to
other programs (such as
an external spreadsheet
program), it is sometimes
best not to select all of the
options, as some may
affect formatting.
Set Measurements
110. Set a measurement box for
CH1 BPM.
• Choose CH1 as the selected
channel.
• Choose “bpm” as the
From the pull-down menus in the measurement box, choose
CH1 as the selected channel, and BPM as the measurement.
• TIP: If the channel you wish to measure is the active channel, you can
set SC (selected channel) as the channel to be measured.
measurement.
111. Set a second measurement box
for CH1 delta T (Time).
From the pull-down menus in another measurement box,
choose CH1 as the selected channel, and delta T (Time) as the measurement.
• Choose CH1 as the
selected channel.
• Choose “delta T” as the
measurement.
112. Use the I-beam tool to select
an area of data from the peak
of one R-wave to the peak of
the next R-wave.
Zoom in on the CH1 ECG data. Identify and select a region from the peak of
one R-wave to the peak of the next R-wave.
PRO Tutorial
33
Paste Measurement Data
113. Click the cursor in the Journal
where you want to paste the
measurement.
114. Choose the menu command
Edit>Journal>Paste
Measurement.
115. Review the Journal entry.
When you use the Paste
Measurement function,
all the measurements
showing a value will be
written to the Journal.
If you do not want a
particular measurement
pasted to the Journal, go
to the pull-down menu
for that measurement and
select the option “none.”
PASTE WAVE DATA TO THE
JOURNAL
The Paste Wave Data function writes to the Journal all the data points of the
selected area in the graph window.
116. Use the I-Beam tool to select
the portion of the waveform
you are interested in.
It is very easy to put a lot of data into the Journal using this command.
You are not pasting simply a measurement—you are pasting all the data points
of the selected area of the waveform in all channels. If you select one second
of a wave that was sampled at 200 Hz, 200 numbers will be pasted into the
Journal. The values will be formatted in columns headed by the respective
channel names.
117. Click the cursor in the Journal
where you want to paste the
wave data and choose
Edit>Journal>Paste Wave
Data
118. Review the Journal entry.
Journal data may be exported to a file of type “.txt” for subsequent
import into other programs such as spreadsheets.
If you wish to copy graph window data not to the Journal, but directly into
external programs, use the Edit>Clipboard submenu commands. Copy
measurements, wave data, and graphs for pasting directly into word
processors, spreadsheets, and graphic programs.
© BIOPAC Systems, Inc.
www.biopac.com
34
Biopac Student Lab
JOURNAL TEXT TOOLS
The Journal is saved with the data file. If the data file is closed and
reopened, the Journal notes and window position will be as when the file was
last saved.
119. Review and practice using the
text tools for working with
Journal notes.New Journal
Journal Text Tools are activated by icons in the Journal Toolbar at the top
of the Journal and below the graph window.
New Journal deletes all text currently in the Journal.
Load Text
Load Text enables the import of data from other files into the Journal. It
generates a window to import files, which are limited to files of type “.txt.”
Save Text
Print Journal
Part 6: Printing Graphs
120. Read about the Print functions
to the right.
Save Text allows you to export your Journal notes to a separate file of
type “.txt.” This is useful for exporting data to other programs, such as
spreadsheets, for further manipulation and analysis.
Print Journal prints the contents of your Journal.
The File>Print command will print what is displayed in the graph window.
You control how data will be printed by controlling how the data is displayed
on the screen.
For instance, if you’ve zoomed, changed scale, or hidden a channel, only the
portion of data displayed in the graph window will be printed. This can be
useful if want to print only a portion of the graph.
121. Adjust the graph window
to show the portion of the
graphs you wish to print.
Show or hide the waveform channels you wish to print.
To print a portion of the data file, use the zoom tool, scale tools, and scroll bars
to display the portion of the recording you wish to print.
To print the complete data file, choose Display>Autoscale Horizontal and
Display>Autoscale Waveforms to center waveforms and display the entire
recording.
122. Choose File>Print to generate
the Print Graph dialog.
123. Choose OK to print the graph
window.
124. Review the printed result.
Choosing File>Print Graph generates a dialog with options that will depend
on the printer (and operating system) you are using. Set print options as
desired, and use the Print Setup command to set paper size, orientation, etc.
Consult the BSL PRO Manual for more information about printing. Refer to
the user manual for your computer and/or printer for details about your
particular printer.
125. Close the 4channel.acq sample This completes the BSL PRO 3.7 Tutorial. Following is a brief description of
other sample files that you may wish to review.
data file.
PRO Tutorial
35
Sample Data Files
To further your familiarize yourself with features of BSL PRO and see how it
can make your work easier, open and examine other data sample files included
with the BSL PRO installation. Sample files include the following.
SAMPLE FILE NAME
DESCRIPTION OF DATA
4Channel.acq
Provides quantitative data on how the cardiac and respiratory cycles change as
metabolic demands on the body change. (Demonstrated in this Tutorial)
BloodPressure.acq
Shows simultaneous recordings of Blood Pressure and Korotkoff Sounds
EEG.acq
Shows how EEG activity changed when the Subject opened and closed her
eyes (markers indicate change).
EMGwForce.acq
Shows simultaneous recordings of Clench Force and EMG, correlating motor
unit recruitment to increased power of skeletal muscle contraction and
measuring changes in EMG and Force when the muscles become fatigued.
FingerTwitch1.acq
Shows simultaneous recordings of Force, Displacement, and Stimulator output.
The Stimulator pulse induced skeletal muscle twitch causing the Subject's
finger to lift a small weight.
FingerTwitch2.acq
Channel 1 displays the force generated from the twitch of a finger after a
stimulus was delivered to the forearm of a human subject. Channel 2 shows the
stimulus. The event markers above the graph window mark the points in the
recording when the stimulus frequency was increased.
NerveConduction.acq
Channel 1 displays the stimulus voltage and Channel 2 the motor (EMG)
response of a muscle. The display is in the Overlap Segment mode, which is an
easy way to view the EMG response to different levels of stimulus
StandardCurveData.acq
Shows a typical Standard Curve, used in colorimetric studies to find the
concentrations of unknown solutions.
ValidateMeasurements.acq
Demonstrates multiple measurements on a selected area of data.
© BIOPAC Systems, Inc.
www.biopac.com
36
Biopac Student Lab
Copyright
Information in this document is subject to change without notice and does not represent a commitment on the part of
BIOPAC Systems, Inc. This tutorial and the software it describes are copyrighted with all rights reserved. Under
copyright laws, this tutorial or the software may not be copied, in whole or part, without the written consent of BIOPAC
Systems, Inc., except in the normal use of the software or to make a backup copy.
The same proprietary and copyright notices must be affixed to any permitted copies as were affixed to the original. This
exception does not allow copies to be made for others, whether or not sold, but all of the material purchased (with all
backup copies) may be sold, given, or loaned to another person. Under the law, copying includes translating into another
language or format.
Biopac Student Lab Tutorial, including all text and graphics, are ©1998-2005 BIOPAC Systems, Inc., with all rights
reserved.
Warranty
BIOPAC Systems, Inc. warrants its hardware products against defects in materials and workmanship for a period of 12
months from the date of purchase. If BIOPAC Systems, Inc. receives notice of such defects during the warranty period,
it will, at its option, repair or replace the hardware products that prove to be defective.
This warranty applies only if your BIOPAC Systems, Inc. product fails to function properly under normal use and within
the manufacturer’s specifications. This warranty does not apply if, in the sole opinion of BIOPAC Systems, Inc., your
BIOPAC Systems, Inc. product has been damaged by accident, misuse, neglect, improper packing, shipping,
modification, or servicing by other than BIOPAC Systems, Inc.
Any returns should be supported by a Return Mail Authorization (RMA) number issued by BIOPAC Systems, Inc.
BIOPAC Systems, Inc. reserves the right to refuse delivery of any shipment containing any shipping carton without the
RMA number(s) displayed on the outside. The Buyer shall prepay transportation charges to the site designated by
BIOPAC Systems, Inc.
BIOPAC Systems, Inc. makes no warranty or representation, either expressed or implied, with respect to this software,
its quality, performance, merchantability, or fitness for a particular purpose. As a result, this software is sold “as is” and
you, the Buyer, are assuming the entire risk as to its quality and performance.
In no event will BIOPAC Systems, Inc. be liable for direct, indirect, special, incidental, or consequential damages
resulting from any defect in the software or its documentation, even if advised of the possibility of such damages, or for
damage of any equipment connected to a BIOPAC Systems, Inc. product.
Trademarks
Biopac Student Lab is a trademark of BIOPAC Systems, Inc.
Windows is a trademark of Microsoft Corporation; Mac OS X is a trademark of Apple Computer, Inc.
This document was created with Microsoft Word for Windows, Adobe Photoshop, Adobe Distiller, Corel Draw 7.0,
Mainstay Capture, and JASC, Inc. JasCapture.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising