Mixed signal option (MSO, R&S RTP-B1)
R&S
®
RTP
935User Manual 1337.9952.02 ─ 12
The digital signals are shown in the diagram, and the signal icon of the parallel bus
appears on the signal bar. Using this bus icon, you can minimize, arrange, and
switch off the bus together with its channels in the same way as you do with any
waveform.
3. Set the logical thresholds as described in Chapter 14.1.6, "Setting the logical
thresholds", on page 935.
4. If the bus has a clock signal, open the "Bus" tab.
Enable "Clocked bus" and select the "Clock source" and "Clock slope".
5. If necessary, enter a "Label" for each digital channel in the "Label" tab.
6. If necessary, enter a "Skew" value to time-align the channel in the "Skew" tab.
Now the configuration of the parallel bus is completed.
14.1.6 Setting the logical thresholds
For a detailed description of the settings, see Chapter 14.1.1.1, "Setup", on page 926.
Threshold settings are the same for all active parallel buses.
1. Open "Menu" > "Logic" > "Setup".
2. To set the thresholds, use one of the following ways:
a) Use the same value for all digital channels and all parallel buses:
● In the "Logic: Advanced" dialog, enable "Coupe thresholds".
● Open the "Setup" tab. To set the threshold, either select a predefined
"Technology" value or enter a user-defined value.
b) Set different thresholds for the individual channel groups:
● In the "Logic: Advanced" dialog, disable "Coupe thresholds".
● Set different thresholds for each bus. Active buses use the same threshold
and hysteresis values.
3. In the "Logic: Advanced" dialog, set the "Hysteresis" for each threshold to avoid the
change of signal states due to noise.
14.2 Display
You can adjust the display of the parallel bus signals and the individual digital channels
to optimize the analysis of bus data:
●
Show the digital channels which are assigned to the bus, drag them to the optimal
position, and scale them
●
Show the decoded bus signal in different ways:
– comb display with numeric bus values
– analog display with bus values as amplitudes (quasi-analog waveform)
Display
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