Software Manual
for Oscilloscope
1
Welcome ..................................................................................................................................................... 1
2
Version ........................................................................................................................................................ 1
3
System requirement .................................................................................................................................. 2
4
Using for the first time ............................................................................................................................... 3
5
4.1
Windows XP driver installation........................................................................................................ 3
4.2
Windows 7 driver installation........................................................................................................... 5
Software introduction ................................................................................................................................ 5
5.1
PC Oscilloscope basics..................................................................................................................... 5
5.2
PC Oscilloscope Introduction ........................................................................................................... 6
5.2.1 Start and pause ........................................................................................................................ 6
5.2.2 Wave display area .................................................................................................................. 7
5.2.3 Display menu .............................................................................................................................. 7
5.2.4 Gear knobs................................................................................................................................. 11
5.2.5 Auto Measurement ................................................................................................................... 12
5.2.6 Menu......................................................................................................................................... 14
5.2.7 Wave set up .............................................................................................................................. 15
5.3
Signal Generator Software Function .............................................................................................. 19
5.3.1 PWM ........................................................................................................................................ 20
5.3.2 Conventional waveform signal ................................................................................................. 21
Oscilloscope
1
2013-09-25 Version 6.0.0
Welcome
With a scope device from us, this software turns your PC into a powerful PC
Oscilloscope with all the features and performance of a bench-top oscilloscope at a
fraction of the cost.
2
Version
Software of Version 6.0 0 is a major new release of Oscilloscope device.
feature
No installation
.net architecture
details
The software do not need to be installed on your PC
The latest Windows .NET technology helps us get new features to
you quicker.
OS support
Advanced algorism
Support XP, Win 7, Win 8 (both 32 bit and 64 bit) OS.
Improved algorism to avoid burr losing during the plotting a large
quantity of sampled data to PC screen with a limited pixel number.
functions
details
live sampling
Dual channels with independent live sampling and displaying.
Recoding and
We can record the interested waveforms into files and review them on
Reviewing
any other time. We can pause or jump to the specified frame,
backwards and forwards to observe the details.
Trigger
Support normal trigger and single trigger.
AC & DC coupling
Support AC & DC coupling
Auto measurement
Maximum, minimum, average, frequency, period, positive width,
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negative width, duty rate, peak-peak, rising time
Cursor
measurement
Zoom in & zoom out
With mouse dragging on the plot area, we can measure the latitude
and altitude span upon the selected rectangle.
Three kinds of Zoom function are available: Zoom in the X axis, Zoom
out the X axis, Zoom in both X axis and Y axis.
FFT
Move left/right
Show the FFT curve for the measuring channel.
We can move the waveforms left or right to find another interested
area while in the zoomed states
Math operation
Lissajous pattern
text storage
3
Show the curve of ch1 + ch2, or show the curve of ch1 + ch2.
Frequency measurement or phase difference
Save the wave as text storage
System requirement
item
OS
description
Support XP, Win 7, Win 8 (both 32 bit and 64 bit) OS.
CPU
>2.0G
RAM
>1.0G
SDK
.net framework 2.0
ports
USB 2.0 compliant port
temperature
0 ~ 40 centigrade
Note: Dot net framework 2.0 is a necessary condition for this software's running on XP OS,
so we need install Dot net framework 2.0 for this product. We provide 32 bit Dot net framework
2.0 (dotnetfx20.exe) in the software package for your convenience.
We do not need it on the Win7 OS and the XP ones on which the .net framework 2.0 has been
installed.
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You can also get the latest version on
http://www.microsoft.com/en-us/download/details.aspx?id=1639
4
Using for the first time
We have designed this device to be as easy as possible to use, even for newcomers to
oscilloscopes. Once you have followed the introductory steps listed below, you will soon
be on your way to becoming an expert.
1： Plug in your scope device. Windows will recognize it and prepare your computer
to work with it.
2：Install the driver: After the step 1, the PC will recognize a new device for you. We
need install the driver for this new device before we can use it. You can find the driver
under the folder “driver” in the software package. Detailed instructions on how to install
driver on different OS are described in chapter 4.1and4.2.
3：Execute the software application, and click the start button on the lower right
corner, the oscilloscope would be started and plotting zero voltage waveform of the
channel 1 by default. Click the “ch2” button on the upper right corner, the waveform of
channel 2 will appear.
4：With the probes attached by this device, we can connect a signal to the scope and
enjoy our first wave. For your convenience, our scope device provides a metal chip to
output a 3.3V, 1K Hz square signal.
4.1
Windows XP driver installation
Connecting the product to the host PC with the USB cable we provided, the PC will
recognize a new device for you. We need install the driver for this new device before we
can use it.
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Besides following the system prompt, you can also install a driver for this device
manually. Right click on "my computer" to choose "properties", and then choose "device
manager" (In Windows 2000, you have to choose the "hardware" tab first and then
"device manager"). This will display a list of the devices that are on your computer. Right
click on the device "LJTUSB" and click "properties" t0 choose "driver" and click "update
driver", you will be asked to browse for the new driver.
Step 1: Choose “Install form a list or specific location”，and "Next":
Step 2: Choose “Browse”, set the location to your driver's path, such as
“e:\Osillagraph_setup\driver”, and then “Next”：
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Step 3: done.
After the install, you may find our device in the device manager.
4.2
Windows 7 driver installation
Plug in the device and win7 will find a new device for us.
Step 1: Windows 7 usually search the driver by Windows Update for new device. I t will
fail because our device isn’t a standard device for common use.
Step 2: Install the driver manually: Right click on the “my computer” on desktop,
and
select “manage” to initiate device manager, we will find our device , right click on it and
select “update the driver”.
Step 3: In the following dialog Win7 provide, we choose the item which means browse
the computer to search our driver.
Step 4: We provide the path of driver for next dialog to tell system where to find our driver.
The path must set to the “driver” folder.
Step 5: Done.
5
Software introduction
5.1
Oscilloscope basics
An oscilloscope is a measuring instrument that displays a graph of voltage against
time. For example, the picture below shows a typical display on an oscilloscope screen
when a varying voltage is connected to one of its input channels.
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Oscilloscopes allow you to adjust the vertical and horizontal scales of the display.
The vertical scale is called the voltage range. The horizontal scale is called the time base.
In this software, all the channels share the same time base.
We provide three knob controls to adjust voltage range for each channel and the
time base for both channels.
5.2
Oscilloscope Introduction
5.2.1 Start and pause
There are two ways to start the scope:
1: If we launch this software first, and then plug in the device, scope will get started
automatically.
2: If we launch this software after plugging the device, scope should be started by
clicking the start button.
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In the running state, the start button turns into a stop button, on clicking which the
scope will be stopped until another start. When the device is plugged out suddenly, the
software will turns into a stopped state automatically. We recommend to plug out the usb
connection after closing the software when you are done with your using.
5.2.2 Wave display area
5.2.2.1 Waves
Two independent waves from ch1 and ch2 are draw here (selected by the channel
control buttons in operation panel), blue for ch1
.
, and yellow for ch2
5.2.2.2 Zero-input positions
Adjustable Zero-input position indicator is provided for each channel, which could
be dragged vertically by mouse to set the zero input position
.
5.2.3 Display menu
5.2.3.1 Fit all window
Display the default waves, usually used to get rid of the effect of zoom and
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cursor measurement.
5.2.3.2 Cursor measurement
Set the cursor to be a cross type, and tell the time span and voltage span
value of the dragged rectangle.
5.2.3.3 Info
Show the info of device name, current state, function type and current sample
rate
5.2.3.4 Zoom in
: Set the cursor to be a cross type, and zoom in the dragged rectangle onto all wave
area, meanwhile, a thumbnail shows up to remind you the original default waves. To end
this zoomed state, click on the “Fit all window” item we mentioned before.
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5.2.3.5 "Zoom out"
This feature is only valid under magnification, can be used continuously,
constantly transverse shrink on the waveform image which has been enlarged, until
reduced to a non-horizontal state before enlargement.
5.2.3.6 "Left", "right"
This feature is only valid under magnification, can be used continuously,
constantly maintain the current zoom scale pan around on the waveform image which
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has been enlarged ,until moved to the far left or far right circles.
5.2.3.7 " X Axis Zoom in"
This menu item's functions is X horizontal axis marquee Zoom in, methods of
operation is the same with 5.2.2.4 "Zoom in"
5.2.3.8 "Color Mode”
This menu item is clicked, the display mode of the drawing area will be in black and
white and color modes. Black and white screen shots as shown below , facilitate the data
waveform shots use of producing reports document s. Color mode can facilitate long
observation waveform and avoid eyestrain.
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‘‘X-Y PLOT’’
‘‘X-Y PLOT’’ named “Lissajous pattern”, the measured signal and the standard
signal are respectively displayed at the X axis and the Y axis, and become a synthesis of
graphics in the oscilloscope display.
5.2.3.10
"Save”
The collected data will be saved in the text file format (.TXT) .
5.2.4 Gear knobs
5.2.4.1 Time knob
All the channels of the virtual oscilloscope share the
same time gear knob. Time gear's change affects each
channel at the same time. Time knob gear selected
value represents each cell of the waveform drawing
area representing the time span of a cross.
Different
types
of
devices
may
have
different
distribution of time shift values, the right shots for
reference only, specific gear please refer to each type of hardware description.
All the channels of the virtual oscilloscope share the same time gear knob. Time gear's
change affects each channel at the same time. Time knob gear selected value
represents each cell of the waveform drawing area representing the time span of a
cross.
Different types of devices may have different distribution of time shift values, the right
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shots for reference only, specific gear please refer to each type of hardware description.
5.2.4.2 Voltage knob
All channels of the virtual oscilloscope using their own
independent voltage range knob between unaffected.
As shown in the screenshot on the right, select the
chart below Channel tab will switch out the selected
channel voltage gear knob.
Voltage value of the selected determines the currently set channel in the waveform
drawing area in accordance with the voltage proportional of each vertical grid to display
the collected voltage waveform. However, this value has nothing to do with the scale, but
determines the ratio of display and measurement.
Different types of devices may have different distribution of time shift values, the left
shots for reference only, specific gear please refer to each type of hardware description.
5.2.5 Auto Measurement
During the running of oscilloscope, the automatically measurement area of this virtual
oscilloscope software can refresh and show a variety of waveform measurements
displayed on the current screen in real time. By clicking on the bottom of the channel
tabs to display different channel automatic measurements. Because of the display
resolution, you may not be able to simultaneously display all the measured quantities, by
dragging the scroll bar on the right side of the region can browse all automatic
measurement quantities further.
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Measured
description
quantities
Maximum
The highest voltage value of channel waveform
on the Current screen , unit V
Minimum
The lowest voltage value of channel waveform
on the Current screen , unit V
Peak to
Max - Min, Unit V
peak
Frequency
Unit kHz. Value is for the current channel's
average frequency waveform displayed on the
screen
Average
On the screen, current channel waveform's all
the data points voltage value simply summing
then average, unit V.
Period
unit Ms
Positive
In the middle of the minimum and maximum
and
value basis, higher than the reference waveform
negative
width is positive pulse width ,less than the
pulse width
reference waveform width is negative pulse
width, unit Ms.
Duty
Positive pulse width divided by the cycle
Rise time
Time of waveform from peak to peak position
increased from 5% to 95%, unit Ms..
RMS
The RMS value of the voltage waveform on the
screen, unit V.
Note: If the current channel's waveform displayed on the screen is less than one period or more
than 50 cycles, respectively, because of the display is too sparse or too dense, resulting amount
of time-related measurements is displayed as 0, then the value does not represent a real 0.
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Menu
The menu located at the upper left corner, contains the basic function and parameter
Settings of the oscilloscope.
5.2.6.1 “FILE”
FILE contains 3 options:
 Open :

open the saved files and then display the Graphics in the draw area.
Save as txt:
 Export:
the collected data will be saved in the text file format (.TXT)
.
this function is reserved.
 Record and review:
the wave will be recorded and reviewed.you can find the
shortcut button in the function area.
5.2.6.2 “EDIT”
5.2.6.3 “VIEW”
View contains 3 different Mathematics view functions:
 FFT: the raw data of the current selected channel can be FFT ,and draw the vertical
as the voltage amplitude, Abscissa as thel frequency curve .
 Ch1+Ch2: output the vector sum wave of ch1 and ch2
 Ch1-Ch2: output the vector difference wave of ch1 and ch2
5.2.6.4 “OPTIONS”
 Show in notify area
 Do not show the task bar
 Perform the current settings for next open
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5.2.7 Wave setting function
This function area located under the menu bar
 Coupled Model: DC or AC can be choosed in view of the different signal
measurement requirements
 Channel states: channel is ‘on’ and channel 2 is ‘off ‘by default.
 probe gears :
“1X”: 1:1 probe using
“10X” :1:10 probe using
“100X” :1:100 probe using
 Trigger: channel:
ch1 or ch2
trigger way:
rising edge trigger or HSDOWN
trigger type: no trigger
or normal or singer
 modules: oscilloscope
oscilloscope+signal generator
logic analyzer
 wave record and review
When you need to put the waveform recording in the whole process of signal
acquisition for subsequent further observation or send mail to other staff for off-site
analysis, the waveform recording function that we provide will bring great
convenience and help.
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Waveform record file uses its own unique file format.
The different types of equipment has slightly different suffix,
roughly *. bmxxx. File name is automatically generated as a
starting date and time combinations when it is beginning to
record and it is stored in the directory of the software.
Composition rules of file name as shown in the image below:
Button is the Record button. Showing gray stands for the non-recording
state and showing red stands for the recording state. When the red status button is
clicked, the waveform recording starts. The button will flash alternately red and gray. It
suggests that the waveforms are being recorded. When the device is not properly
connected, the software collection is suspended or turned on and the waveform file is
being played back, these are non-recording state. The button shows gray at this time
and you can not start recording.
It records all the waveform data which appear on the screen during recording
process. In order to accurately restore a variety of related settings of recording in the
playback process, the following settings will be synchronized stored and during playback
process these settings are automatically forcibly set to be recording stored state.
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1
Time knob gear
2
voltage knob gear of all the opening state
channel
3
Channel Select button state
How many frames of the screen waveform you want to record can be set via the
Configuration button
. A window with sliders will pop up for users to choose how
many frames of the screen waveform you want to record after clicking the Configure
button.
There are multiple buttons and controls involved in the control during playback
process. The playback operation of all states can be effected in addition to recording a
wave file or playing back on the last wave file. If the playback comes across the real-time
acquisition process, then the playback operation will force the software to pause the
real-time acquisition process into the waveform playback state.
The capture state of waveform playback and the real-time acquisition both display
constantly updating waveform. Then how to distinguish the waveform which is still being
played on the screen is the real-time waveform or the stored waveform playback? The
important difference is that the background color of screen drawing area at the two states.
The background color of the real-time acquisition state is dark blue (below left) and the
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background color of waveform playback state is gray-black (below right).
Playback Waveform steps:
1:Click the Folder button
can open a file dialog.
2： Browse to waveform data files and specify the file which is needed.
3: The file's full path and name will be displayed in the inside text field below the
button and the waveform data will be started playback after selecting and opening the
waveform file
4: The total number of frames waveform data in the opening wave file is displayed
at the far left side of the following line in the text field. For example, the total number of
frames is 50 in the image below. The number of the frame which is currently being
played is shown near the total number of frames. You can select the forward and
backward by up and down arrows or enter the number of frames to be played directly.
Rightmost button is the start and pause button.
5: A dialog box prompts that playing is over after all data frames in the file have
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finished playing.
6: If you need to play the same waveform file, you do not need to repeat Step 1 to
re-open the file. It will be played again by clicking the Start button .
5.3
Signal Generator Software Function
When a hardware device plug into the signal generator module, you need to select
the item "Oscilloscope + signal generator" of the menu option in the top right corner of
the software to enable the control function of signal generator software.
Enabling and stopping the signal generator require action buttons:
. When
the button is started, the output interface of signal generator module will output in
accordance with the targets set by the software. The output state of signal generator is
indeterminate after stopping the button.
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5.3.1 PWM
You can select the PWM to output tunable square wave signal which can get the
20K maximum frequency .The duty cycle could be adjusted by 10% of the ladder.
Frequency can be input by the numeric keypad buttons in the image above and the duty
cycle can be changed via dragging the slider quickly. The default output is 500HZ, 50%
duty cycle waveform.
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5.3.2 Conventional waveform signal
Select the output waveform of the conventional kind: square wave, sine wave,
triangle wave.
For entering the frequency of the signal to be generated, 1HZ ~ 20MHZ can be
continuously set.
The bias and the amplitude of the signal can be easily set via slider control.
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