Serial bus analysis
R&S
®
RTM3000
314User Manual 1335.9090.02 ─ 09
Audio configuration settings
Figure 13-38: Audio setup dialog
Source
Selects the audio line that you want to configure in the menu.
Word Select
Selects the source of the word select line.
If the MSO option R&S RTM-B1 is installed, you can use logic channels as source.
Remote command:
BUS<b>:I2S:WSELect:SOURce on page 672
Polarity
For I²S, LJ and RJ signals, the polarity defines the word select values assigned to the
left and right channels.
●
"Normal": 0 indicates the left channel, and 1 indicates the right channel. This is the
usual setting.
●
"Inverted": 0 indicates the right channel, and 1 the left channel.
For TDM signals, the polarity defines the edge of the frame synchronization pulse that
identifies the beginning of a frame. The frame starts at the next clock edge following
the selected FSYNC edge.
●
"Normal": the frame begins with a rising edge. This is the usual setting.
●
"Inverted": the frame begins with a falling edge.
Remote command:
BUS<b>:I2S:WSELect:POLarity on page 671
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"
Audio signals (option R&S
RTM-K5)
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