coco80 step by step tutorial
TRANSCRIPT
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Step by Step Tutorial for CoCo-80
This tutorial demonstrates a step by step approach to set up the signal display, analysis parameters, input and output
channels, recording, signal save and other basic operations. It takes approximately 1 hour to complete the entire
tutorial. The tutorial is divided into the following sections:
1. Start up and Display Operations2. Parameters Settings3. Record the Time Streams and Save the Signals4. Set up the Trigger for Transient Capture5. Cursor Operation
User Operation CoCo Screen and comments
Part 1: Start up and Display Operation
Part 1 demonstrates how to start up the CoCo, open a project file, add signals to a window, scale and pan within thewindow and change the display format.
Press the Power Buttonand
wait for the device to initialize.
Press the Analysis Button.
Use the Up/DownButtonsto
select Frequency Response
Folderand press the Enter
Button.
Use the Up/Down Buttonsto
select
FRF_COH_CPS_APS.csa
then press theEnter Button.
This project computes the auto-power spectra of each channels and the FRF
between ch2, ch3 and ch4 to ch1. Ch1 is the excitation channel.
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The CSA will open and the
display will show the live
signals. Press the F6 Hold
Button to stop the display.
Press the F1 TracesButton. Depending on the project setup during previous use, the screen may show different
signals. It can show auto-power spectra, FRF, or time domain signals. A time
domain signals is shown in the picture below.
Use the Up/DownButtonsto
select Traceand Window
Settings and press the Enter
Button.
Press the F1 Add Window.
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This step creates a new window and assigns the signals into the window.
Use the Up/DownButtonsto
select Add a Window with
one Trace And pressthe
Enter Button.
A window may contain one or two traces.
To display continuous time
streams, highlight the signal
ch1 and press the Enter
Buttonto select it.
Use the Up and Down Arrow
Buttonsto select ch2 and
press the Enter Button.
Only signals with the same type can be overlaid together.
Press the F6 OK Button.
Now a new Window is created.
Press the F4Buttonto switch
from Autoto ZOOM.
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When ZOOM is active then the navigation Buttons can be used to manually adjust
the display scale. When Auto is active then the display scale is automatically
controlled to fit all the data in the window.
Press the UpButtona few
times to expand the Y axis.
Press the Down Buttona few
times to reduce the Y axis.
Press the Right Arrow Button
a few times to expand the X
axis.
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Press the LeftArrow Buttona
few times to reduce the X axis.
Press the ShiftButtononce to
switch from ZOOMto Move
mode.
When Move is active then the UP and Down Arrow Buttons move the signal plot
up or down, left or right to view a specific part of the signal.
Press the Up Arrow Buttona
few times to move the Y axis.
Press DownArrow Buttona
few times to move the Y axis.
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Press the F4Buttonto change
from the Move/Zoommode to
Auto mode.
This concludes the tutorial on scaling and moving around the window.
Next, display the frequency
signals by pressing the F1
TracesButton and select
Trace and Window Settings.
Press the F1 Add Window
Button and selectAdd a
Window with one Trace.
Next, display the auto power
spectra by scrolling down the
list, highlighting the signal
APS(ch1)and pressing the
EnterButtonto select it.
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Scroll down one row to the
next signal, highlight
APS(ch2)and press the Enter
Button.
Press the F6 OKButton.
After OK is pressed, you should see the auto-power spectra display.
Next, change the view mode by
pressing the F1 TracesButton.
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Use the DownArrow Button
and highlight Select View
Mode.
Press the EnterButton.
Select LogMag.
Press the Enter Button.
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Next create a Window with
two traces by pressing the F1
TracesButton.
Press the F1Add Window
with Two Traces Button.
Scroll down the list, highlight
the signal H(ch2, ch1)and
press the EnterButtonto
select it.
Press the ShiftButtonto select
the bottom trace.
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Scroll down the list, highlight
the signal FRF(ch2, ch1)and
press the Enter Button to
select it.
Press the F5 View Mode
Button.
Select Phaseand press theEnter Button.
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Press the F6 OKButton.
Then a window with two traces
will be displayed.
At this stage, if you have created too many windows under the Traces menu. You
can go back to delete some of them so the windows left are those that you
frequently want to see.
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Part 2: Set the ParametersPart 2 demonstrates how to change the sensitivity, units and output channel settings.
Press the F2 Param.Button,
Select Sampling Rate to set
appropriate sampling rate.
Press the EnterButtonto
accept the sampling rate.
Press the F2 Param.Button,
use the UP and Down Arrow
Buttonsto highlight Input
Channelsand press the Enter
Button.
Use the Up and Down Arrow
and EnterButtonsto select
and set the quantity, sensitivity
and engineering unit (details
not shown).
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Press the F6 ApplyButtonto
accept the changes.
The F1 Button, Apply to All Chapplies the same setting to all input channels in
one step.
Press the F2 Param.Button,
Use the Up and Down Arrow
Buttonsto highlight Output
Channel andpress the Enter
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Button.
Use the Up and Down Arrow
Buttonsto move down to
Swept Sine.
Use the RightArrow Button
to set the focus to the right
pane. You can change the
output parameters here (details
not shown).
Press the F4Buttonto enable
the output waveform generator
then press the Display Button.
Connect the signal source to
Channel 1 using the provided
output cable.
After this operation with the signal source is fed into the channel 1, you should
see live sine wave in the signal plot.
Press the F1Traces Button,
select Window: ch1,ch2and
press the Enter Button.
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Press the F2 Param.Button.
Use the Up and Down Arrow
Buttonsto highlight the
Analysis Parameters and
press the Enter Button. You
can change each of the
Analysis Parameters here
(details not shown).
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Part 3: Record the Time Streams and Save the SignalsPart 3 demonstrates how to record time streams, save data frames and review saved data on the CoCo.
Press the F2 Params. Button,
use Up and Down Arrow
Buttonsto highlight the Time
Streams Setup andpress the
EnterButton.
Highlight ch1and press the
EnterButton to check it.
Highlight ch2and press theEnterButtonto check it.
Press the F6 OK Button.
This setup is designed for the convenience of time stream recording.
Press the Rec./StopButton
once, to start time stream
recording.
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Press the Rec./StopButtona
second time to stop time stream
recording.
See the figure above.
Press the FileButton.
Press the F1 FilesButtonto
see a list of recorded timestreams signals or saved
frequency signals.
Use the Up and Down Arrow
Buttonsto highlight a file andpress the F5View Files
Buttonto view the highlighted
file.
Press the F1Buttonto delete
the all the files newer than the
file that is highlighted files;
Press the F2Buttonto delete
all the files.
Press the F4Buttonto copy
the highlighted files to the SD
card.
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Press the DisplayButtonto go
back to the signal display.
Press the F2 Params. Button,
use theUP and Down Arrow
Buttons to highlight the Signal
Snapshot Save Setupand
press the EnterButton.
Highlight Block(ch1)and press
the Enter Button. Highlight
H(ch2,ch1)and press the
EnterButton(or select more
signals to save).
Press the F6 OK Button.
Press the SaveButtontwice to
save the signals.
The first time you press the Save Button, a list of commands is shown. Simply
press it a second time to save the defined signals.
Now that the signals have been saved you can press the File Button to review or
recall the signals.
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Part 4: Set up the Trigger for Transient CapturePart 4 demonstrates how to set up a trigger to capture a transient event including setting the trigger mode, level, pre-
trigger and accept/reject mode. Make sure the signal source is still on and ch1 is connected to the source with a
cable. If the signal source is not on, please go back to Output Channel setup and enable it
Press the F2 Params. Button,
use the Up and Down Arrow
Buttonsto highlight the
Acquisition Modeand press
the EnterButton.
Press the F1 Mode Button.
Use the Up and Down Arrow
Buttons to highlight the
Manual-Arm Triggerand,
press the Enter Button.
Manual Re-Armmeans that in the transient capture, operator you will have a
chance to accept or reject the captured time blocks.
Press the F2 Trigger Source
Button.
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Highlight ch1and press the
EnterButton.
The screen will show a live signal of containing the trigger source.
Press the F4Set Trigger Level
Button.
This selection puts the navigation buttonButton into the functions of setting trigger
level.
Use the Upand DownArrow
Buttonsand select Set Trigger
Level. Then use the Up and
Down Arrow Buttonsto
change thetrigger thresholdlevel. Choose a level that is
below the maximum value of
the sine wave as shown in the
fiture.
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Press the Leftand Right
Arrow Buttonsto set the pre-
trigger percentage.
Press the F4Set Buttonand
select Fixed Scale.
This operation put changes the navigation buttonButtons mode to functions of
setting the scaling window instead of setting up the trigger threshold.
Use the Up and /Down
Buttonsto scale the Y axis
within the window.
Press the F6 ApplyOK
Buttonto accept the trigger
setup.
Use the Left/RightArrow
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buttonButtons to switch
between Hide, Acceptand
Reject. Select Move to Reject
and press the Enter Button.
Next select Acceptand press
the EnterButton.
This must be the second capture. Accept means that the signals will be accepted for
FFT transform and averaged into the spectra and FRF.
Select Hideand press the
Enter Button.
Press the EnterButtonagain. The trigger operation window will be shown again.
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Press the F2 Params. Button,
use the Up and Down Arrow
Buttonsto highlight the
Acquisition Mode and, press
the Enter Button. ;
Press the F1 Mode Button.
Use the Up and Down Arrow
Buttons to highlight Free
Run, and press the Enter
Button. Press theDisplay
Button.
This operation will put change the CoCo back to Free Run mode. In Free-run
mode, means the time capture occurs will be done as fast as possible with
overlapping.
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Part 5: Use CursorsPart 5 demonstrates how to add cursors to a window and move them to analyze a signal. Make sure the screen
contains is in any signal display. If not, press the DisplayButton.
Press the F5 Cursors Button.
This operation puts the navigation buttonButtons into the cursor control mode.
Highlight Add Cursor X1and
press the Enter Button.
Use the Left/RightArrow
Buttonsto move the cursor.
Note the value of the signals is displayed on the right.
Press the F5Cursors Button
and select Remove Cursor X1
to remove it.