Technical data

98 4000 X-Series Oscilloscopes Advanced Training Guide
4 Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs
automatic search to find every occurrence of parity bit errors on both the
Tx and Rx data lines. We will then automatically navigate to each of these
occurrences.
30 Push the horizontal position/delay knob to re- position the trigger point
back to center-screen.
31 Set the scope’s timebase to 200.0 ms/div.
32 Press the [Search] front panel key.
33 Tap the Search Edge softkey; then select Serial 1 (UART/RS232).
34 Tap the Search for softkey; then select Rx or Tx Parity Error.
The white triangles near the top of the waveform area mark the time
location of each “found” occurrence of our search operation as shown in
Figure 63. These frames are also marked in orange in the first/pointer
column of the lister table. Your scope should have found and marked 4 or
5 occurrences of this search operation based on a total acquisition time of
2 seconds. Note that the number of “found” events is indicated near the
bottom of the display. To automatically navigate to each parity bit error,
press the and front panel navigation keys.
Figure 63 Using the scope’s automatic Search & Navigation capability to find all
occurrences of parity bit errors over a 2 second time span.