Rohde & Schwarz RTE Series - Page 680

Protocol analysis
R&S
®
RTE
680User Manual 1326.1032.02 ─ 20
Thresholds
Sets the threshold value for digitization of the data signal. If the signal value on the line
is higher than the threshold, the signal state is high (1 or true for the Boolean logic).
Otherwise, the signal state is considered low (0 or false) if the signal value is below the
threshold.
There are several ways to set the thresholds:
●
"Upper threshold" and "Lower threshold"
Upper and lower threshold levels. You can enter the values directly in the fields.
●
"Preset thresholds"
Selects the default threshold voltage from a list. The value is set to "Manual" if the
threshold was set with "Auto thresholds", or was entered directly.
●
"Auto thresholds"
Executes the measurement of reference levels and sets the thresholds to the middle
reference level of the measured amplitude.
Remote command:
BUS<m>:ARINc:THReshold:HIGH on page 1635
BUS<m>:ARINc:THReshold:LOW on page 1635
BUS<m>:ARINc:PRESet on page 1635
BUS<m>:SETReflevels on page 1421
Bit Rate
Selects the number of transmitted bits per second. The value can be set to high speed
(100 kbps) or low speed (12.0- 14.5 kbps).
Remote command:
BUS<m>:ARINc:BRValue on page 1633
BUS<m>:ARINc:BRMode on page 1633
Timing: Min gap, Max gap
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.
You 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 1634
BUS<m>:ARINc:MAXGap:SELect on page 1633
BUS<m>:ARINc:MINGap:BITS on page 1634
BUS<m>:ARINc:MINGap:SELect on page 1634
TRIGger<m>:ARINc:MINGap:BITS on page 1638
TRIGger<m>:ARINc:MINGap:SELect on page 1638
TRIGger<m>:ARINc:MAXGap:BITS on page 1638
TRIGger<m>:ARINc:MAXGap:SELect on page 1638
ARINC 429 (option R&S
RTE-K7)