Protocol analysis
R&S
®
RTO6
669User Manual 1801.6687.02 ─ 05
Threshold
Sets the threshold value for digitization of the signal. If the signal value on the line is
higher than the threshold, the signal state is high. If the signal value on the line is
below the threshold, the signal state is low
. The interpretation of high and low is
defined by the Polarity
.
There are two ways to set the threshold:
"Threshold"
Enter the value directly in the field.
"Find thresh-
olds"
Executes the measurement of reference levels and sets the thresh-
olds to the middle reference level of the measured amplitude.
Remote command:
BUS<m>:
CXPI:THReshold
on page 1931
BUS<m>:SETReflevels on page 1671
Hysteresis
Sets a value for the hysteresis.
The hysteresis is applied as ("Threshold" +"Hysteresis") and ("Threshold" - "Hystere-
sis").
Remote command:
BUS<m>:CXPI:HYSTeresis on page 1931
Expected IBS length
Sets a range for the expected inter-byte-space (IBS) length.
The standard has a permissible IBS length. Violation of these limits leads to decoding
ambiguities. To test different limits, you can set the expected IBS length value.
Remote command:
BUS<m>:CXPI:IBS:MAX on page 1932
BUS<m>:CXPI:IBS:MIN on page 1932
Expected IFS length
Sets a range for the inter-frame-space.
The standard has a permissible IFS length. Violation of these limits leads to decoding
ambiguities. To test different limits, you can set the expected IFS length value.
Remote command:
BUS<m>:CXPI:IFS:MAX on page 1932
BUS<m>:CXPI:IFS:MIN on page 1933
Show thresholds
If enabled, the threshold levels are displayed in the diagram.
Remote command:
BUS<m>:THReshold on page 1671
13.11.2.2 Advanced settings
Access: [Bus] > "Advanced" tab.
CXPI (option R&S RT
O6-K520)
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