Protocol analysis
R&S
®
RTO6
710User Manual 1801.6687.02 ─ 05
Timing: Min gap, Max gap ← Error Conditions
Defines the idle time between two words, which is needed for word synchronization.
The beginning of the first bit after the gap marks the start of a new word.
Y
ou can define a minimum idle time
"Min gap", and/or a maximum time "Max gap". The
standard defines a minimum of 4-bit times to separate two subsequent words.
Timing settings are relevant for protocol configuration and error trigger.
If "Min gap" and/or "Max gap" are enabled, the instrument detects the specified gaps
during decoding. If the trigger type "Error condition" is selected in addition, the instru-
ment triggers when the gap is shorter or longer than the specified gaps, respectively.
Remote command:
BUS<m>:ARINc:MAXGap:BITS on page 1984
BUS<m>:ARINc:MAXGap:SELect on page 1984
BUS<m>:ARINc:MINGap:BITS on page 1984
BUS<m>:ARINc:MINGap:SELect on page 1984
TRIGger<m>:ARINc:MINGap:BITS on page 1988
TRIGger<m>:ARINc:MINGap:SELect on page 1988
TRIGger<m>:ARINc:MAXGap:BITS on page 1989
TRIGger<m>:ARINc:MAXGap:SELect on page 1989
13.13.3.2 Triggering on ARINC 429
Prerequisites: A bus is configured for the ARINC 429 signal to be analyzed.
1. Press the [Bus] key and selet the "Shortcuts" tab.
2. Press "Setup trigger".
3. Tap the "Source" button and select the "Serial bus" trigger source.
4. Select the serial bus that is set to ARINC 429.
5. Select the "Trigger type".
6. For more complex trigger types, enter the data pattern conditions.
For details, see Chapter 13.13.3.1, "ARINC 429 trigger settings", on page 707.
13.13.4 ARINC 429 decode results
When the configuration of the serial bus is complete, the signal can be decoded:
1. In the "Protocol" dialog > "Setup" tab, enable "Decode".
2. In the "Protocol" dialog > "Display" tab, select additional result display settings:
"Show decode table" and "Show binary signals".
For a description of the display settings, see also Chapter 13.1.3, "Display",
on page 487.
The instrument captures and decodes the signal according to the standard definition
and the configuration settings.
ARINC 429 (option R&S RT
O6-K530)
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