Protocol analysis
R&S
®
RTE
645User Manual 1326.1032.02 ─ 20
Make sure that:
●
In the [PROTOCOL] > "Decode" tab:
– The correct "Protocol" is selected.
– The data sources of the serial bus are channel signals.
●
In the "Trigger" > "Setup" tab:
– The trigger "Sequence" = "A only".
– The trigger "Source" = "Serial bus".
– The correct "Serial bus" is selected.
Serial bus
Selects the serial bus to be triggered on. Make sure to select the correct bus before
you enter the settings.
To trigger on a serial bus, the signals sources must be channel signals. If the data or
clock source is a math or reference waveform, you cannot trigger on that bus.
Remote command:
TRIGger<m>:SOURce:SBSelect on page 1425
Protocol
Defines the protocol type of the selected serial bus.
Remote command:
BUS<m>:TYPE on page 1420
Type
Selects the trigger type.
"Data"
Sets the trigger on a data word or a data range that occurs on a
specified channel or on any channel. The instrument triggers on the
last bit of the specified data pattern.
Description of specific trigger type settings:
●
"Channel" on page 646
●
"Data condition" on page 646
"Window"
This trigger checks if the decoded data values stay inside a "window"
that is formed by a data range and a time specified by a number of
subsequent words. It considers a selected channel or all channels.
The instrument triggers at the end of the last word. Thus, for exam-
ple, you can trigger on a pause.
Description of specific trigger type settings:
●
"Channel" on page 646
●
"Data condition" on page 646
●
" Window length" on page 647
Audio signals (option R&S RTE-K5)
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