Serial bus analysis
R&S
®
RTA4000
313
User Manual 1335.7898.02 ─ 08
frame. On the data line, channel blocks of a defined length are transmitted. Each block
contains an audio word that can be shorter than the channel length.
Channel length, channel offset and word length are dependent values:
Channel length
≥
Word Channel offset
13.7.2
Audio configuration
The correct setup of the protocol parameters and the threshold is the condition for
decoding the signal.
To set up and decode an audio signal
1. Press the [Protocol] key in the Analysis area of the front panel.
2. Select the bus that you want to use: B1, B2, B3 or B4.
3. Select the "Bus Type" = Audio.
4. Select "Configuration".
5. Select the "Word Select", "Clock" and "Data" channel sources.
6. Set the threshold. Use one of these methods:
● 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".
Audio signals (option R&S
RTA-K5)
