28119 Parallax Inc, 28119 Datasheet - Page 29

• Manufacturer Part Number: 28119
• Description: KIT UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc

Specifications of 28119

• Lead Free Status: Contains lead
• Accessory Type: Oscilloscope
• Interface Type: USB
• For Use With/related Products: BASIC Stamp® 2 and Board of Education
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Summary
An oscilloscope is a device that allows one to view graphic representations of electrical
signals. Oscilloscopes are delicate pieces of electronic test equipment that must be used
safely and cared for properly. Simple oscilloscopes, such as the OPTAscope, offer two
modes of trigger operation with which to capture signals: Normal and Auto. Normal
mode waits indefinitely for a trigger event before capturing and displaying the
waveforms. Auto mode will wait a short while for a trigger event. If no trigger event
occurs within a short period of time, it will automatically start the capture and display
sequence anyway. Trigger events for simple oscilloscopes are of two types: rising edge
and falling edge. Once a waveform is displayed, it can be measured with either automatic
cursors or with user-positioned cursors.
Exercises
Further Investigation
“What’s a Microcontroller ?”, Student Guide, Version 2.0, Parallax, Inc., 2003
1. Describe the function of the Horizontal dial.
2. Describe the function of the Vertical dial.
3. Describe the difference between the OPTAscope’s Normal and Auto trigger
4. What measurement does the ∆ symbol refer to?
5. What is the maximum voltage that you can safely measure on the OPTAscope?
6. Decrease and increase the
7. Connect the second OPTAscope probe CH2 to another I/O pin. Display both
settings modes.
ToggleIO.bs2, to see what the practical limitations are with the OPTAscope.
What is the smallest value that still allows you to see the signal? What about the
largest value?
signals on the screen by selecting CH2 in the OPTAscope software. Do both
channels change at the same time? Explain your answer.
Written by Andy Lindsay of Parallax, Inc., this text begins with detailed
instructions for setting up and using your BASIC Stamp and Board of Education
or HomeWork Board for the first time. Also introduced is digital output control
with numerous examples that could be utilized with the ideas presented in this
PAUSE
command in the BASIC Stamp program