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Serial bus analysis
R&S
®
RTA4000
333
User Manual 1335.7898.02 ─ 08
● Tap "Find Threshold". The instrument evaluates the signal and sets the thresh-
old.
● Enter the threshold value in the numeric field.
7. Set the other signal parameters according to the signal characteristics. All settings
are described below.
8. In the "Bus" menu, enable "Decode".
ARINC 429 Configuration Settings
Figure 13-47: ARINC 429 setup dialog
Source
Sets the channel for the signal source.
Remote command:
Polarity
Sets the polarity of the bus.
Remote command:
Threshold, Find Threshold
Set the signal threshold for the source channel. Enter a value, or use "Find Threshold"
to set the threshold to the middle reference level of the measured amplitude.
For analog channels, you can find the value also in the "Vertical" menu > "Chan-
nel
<n>" > "Threshold"
For logic channels, you can find the value also in the "Logic" menu > "Technology".
Remote command:
CHANnel<m>:THReshold:FINDlevel
ARINC 429 (option R&S
RTA-K7)