28119 Parallax Inc, 28119 Datasheet - Page 15

• 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

The red and blue arrows to the left are handles that allow you to adjust the vertical
position of the signals. This will allow you to arrange the signals within the Plot Area as
you wish, perhaps separating them for clarity or overlaying them for comparison.
The blue arrow to the right adjusts the trigger voltage. When you move this arrow a line
will be displayed on the Plot Area representing the trigger voltage, then it will disappear
three seconds after you stop moving the arrow. The trigger voltage arrow will change
color depending on which channel you have selected as the trigger source. This arrow
will not show if you set the Trigger Source switch to External .
Horizontal Dial, Vertical Dial (Volts/Div), Channel Buttons and Run/Stop Button
Recall that the OPTAscope can display graphs of two signals, each with two components:
voltage and time. The Horizontal dial sets the time base of the oscilloscope, by choosing
the amount of time represented by each division in the Plot Area. See Figure 1-6.
Figure 1-5:
The Plot Area
Note the
horizontal and
vertical
divisions grid.