User manual

Mixed Signal Option (MSO, R&S RTO-B1)
R&S
®
RTO
325User Manual 1316.0827.02 ─ 06
4. Connect the grabber to a node in the circuit you want to test.
5. For high-speed signals, connect a ground lead to the probe lead, and connect the
ground lead to ground in the device under test.
6. Repeat these steps until you have connected all points of interest.
11.2.2 Configuring Digital Channels and Parallel Buses
The configuration of a parallel bus includes the selection and setup of the digital channels,
the configuration of the bus display, and, if required, the clock configuration.
For a detailed description of the settings, see chapter 11.3.1, "MSO Configura-
tion", on page 328.
1. On the "Protocol" menu, tap "Parallel buses", or tap "Digital Channels" on the "Ver-
tical" menu
2. In the "State" column of the "Signal selection" table, enable the digital channels to be
displayed and included in the bus.
To enable or disable all channels of a pod at once, tap "D0-D7" or "D8-D15".
Enabling one or more channels also enables the display of the signals - "Show dig.
signals", and enables the parallel bus.
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 a waveform.
3. Optionally, you can enter a "Label" for each digital channel, and a "Deskew" value to
time-align the channel.
4.
Set the logical thresholds as described in chapter 11.2.4, "Setting the Logical Thresh-
olds", on page 326.
5. If the bus has a clock signal, enable "Bus clocked" and select the "Clock source" and
"Clock slope".
Now the configuration of the parallel bus is completed.
11.2.3 Adjusting the Display of Digital Channels and Parallel Buses
The display of digital channels and parallel buses is flexible, you can adjust it to your
needs by combining the following settings:
1. Enable "Show bus" if you want to display the bus signal in the diagram. Under "Bus
representation", select if you want to display the decoded bus signal with bus values
("Comb"), or show the bus values as amplitudes, similar to an analog waveform
("Analog").
Analyzing Digital Signals