User guide
Table Of Contents
- 1 OVERVIEW
- 2 ABOUT THE USBscope50
- 2.1 General
- 2.2 USBscope50 Architecture
- 2.3 Using More Than One USBscope50
- 2.4 Input Ranges
- 2.5 Probe Compensation
- 2.6 Acquisition Modes
- 2.7 Trigger Modes
- 2.8 Trigger Position
- 2.9 Trigger Threshold
- 2.10 Data manipulation
- 2.11 Import Graph Data
- 2.12 Software Development Kit (SDK) for USBscope50
- 3 SOFTWARE INSTALLATION
- 4 HARDWARE SPECIFICATION
2.7.1 USBscope50 continuous run in Free Mode
In this mode the acquisition begins just after the software has set up
the scope. The scope will effectively free run, with no attempt to
lock to the input waveform and displaying all the the graph as soon
as data is available. Free mode is good for checking DC levels etc.
2.7.2 Normal Triggering
This includes Rising Edge, Falling Edge, More Than and Less Than
trigger options. In this mode, the acquisition is primed, but will not
start until the input waveform meets some criteria. This mode will
cause the waveform on the screen to “lock” to an edge and so appear
fixed in time. It is useful for observing regular waveforms or for
doing a single triggered acquisition. If no suitable waveform is
present, the scope will wait indefinitely with no display update in the
meantime.
2.8 Trigger Position
The total sample buffer is 3000 points long. The acquisition can be
triggered in Norm mode from the input waveform.
By adjusting the trigger position slider, you can make the trigger
position in the buffer earlier or later in time. This is known as pre
and post triggering.
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By definition, RIS mode needs repetitive waveforms so pre or post trigger has no relevance.
Elan Digital Systems Ltd. 23 USBscope50 USER’S GUIDE Iss8