Keysight DSOX3012T, User Manual

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UART/RS232 Triggering and Serial Decode
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Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 517
• When using the 9 bit format, all data words are displayed in green, including
the 9th bit. The 9th bit is displayed on the left.
• When a data word value is selected for framing, it is displayed in light blue.
When using 9-bit data words, the 9th bit will also be displayed in light blue.
• Decoded text is truncated at the end of the associated frame when there is
insufficient space within frame boundaries.
• Pink vertical bars indicate you need to expand the horizontal scale (and run
again) to see decode.
• When the horizontal scale setting does not permit the display of all available
decoded data, red dots will appear in the decoded bus to mark the location of
hidden data. Expand the horizontal scale to allow the data to display.
• An unknown (undefined) bus is shown in red.
• A parity error will cause the associated data word to be shown in red, which
includes the 5-8 data bits and the optional 9th bit.
UART/RS232 Totalizer
The UART/RS232 totalizer consists of counters that provide a direct measure of
bus quality and efficiency. The totalizer appears on screen whenever UART/RS232
Decode is ON in the Serial Decode Menu.
The totalizer is running, counting frames and calculating the percentage of error
frames, even when the oscilloscope is stopped (not acquiring data).
The ERR (error) counter is a count of Rx and Tx frames with parity errors. The TX
FRAMES and RX FRAMES counts include both normal frames and frames with
parity errors. When an overflow condition occurs, the counter displays OVERFLOW .
The counters can be reset to zero by pressing the Reset UART Counters softkey in
the UART/RS232 Settings Menu.