Protocol analysis
R&S
®
RTP
645User Manual 1337.9952.02 ─ 12
Reverse attenuation
Sets the attenuation factor. It is used to de-amplify the reverse signal before subtract-
ing it from the forward signal.
The effective signal amplitude passed to the decoder is:
Remote command:
BUS<m>:HBTO:ATTN on page 1751
Polarity
Selects the polarity of the data signal. You can select between "Normal" and "Inverted".
For "Normal" polarity, active high is defined as +1 V and active low is defined as -1 V.
For "Inverted" polarity, active high is defined as -1 V and active low is defined as +1 V.
Remote command:
BUS<m>:HBTO:POLarity on page 1753
Thresholds
Sets the positive and negative thresholds for the digitalization of the signal line.
The signal can have three states:
●
High: the signal value is higher than the positive threshold.
●
Low: the signal value is below the negative threshold.
●
Zero: signal is between the positive and the negative threshold.
"Thresholds"
Enter the value directly.
"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>:HBTO:THReshold on page 1753
BUS<m>:SETReflevels on page 1548
BUS<m>:FAUToset on page 1549
Operation mode
Selects the desired direction of the full-duplex signal for analysis. If set to "Auto", the
decoder automatically detects the "Master" or "Slave" mode.
Remote command:
BUS<m>:HBTO:MODE on page 1753
Show thresholds
If enabled, the threshold levels are displayed in the diagram.
Remote command:
BUS<m>:THReshold on page 1549
13.10.2.2 Advanced settings
Access: [Protocol] > "Advanced" tab.
Ethernet 100BASE-T1 (option R&S
RTP-57)
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