User manual

Mixed Signal Option (MSO, R&S RTO-B1)
R&S
®
RTO
326User Manual 1316.0827.02 ─ 06
2. Check the signal icon of the bus to monitor the activities on the digital channels even
if they are not displayed in the diagram:
● blue: channel is low
● green: channel is high
● gray: channel state is changing
3. In the diagram, you can change the display order of the digital channels by dragging
the individual channels to the required position.
4. To adjust the line height and vertical position of all digital channels at once, tap one
of the digital channels and turn the vertical SCALE and POSITION rotary knobs.
5. If the bus signal is displayed as quasi-analog waveform, you can doble-tap the wave-
form to open the "Parallel buses" dialog box.
6. To switch off the display of the digital channels, disable "Show signals".
11.2.4 Setting the Logical Thresholds
For a detailed description of the settings, see "Threshold setup" on page 331.
1. On the "Vertical" menu, tap "Digital Channels", or
on the "Protocol" menu, tap "Parallel buses".
2. To set the thresholds, use one of the following ways:
● Tap "Technology" and select a predefined value according to technology defini-
tion.
The value is applied to all "Threshold" fields.
● Enter a user-defined value directly in the "Threshold" fields. One threshold value
is used for a group of four digital channels. For each channel group, a different
threshold can be set.
● Enable "Coupling" and set one threshold value for all digital channels, either a
"Technology" value or a user-defined value.
3. Set the "Hysteresis" for each threshold to avoid the change of signal states due to
noise.
11.2.5 Triggering on Digital Signals and Parallel Buses
For a detailed description of the settings, see chapter 11.3.4, "Trigger Settings for Digital
Signals and Parallel Buses", on page 332.
1. Press the TRIGGER key and select the "Events" tab.
2. Select the trigger "Source":
● one of the digital channels "D0" ... "D15"
Analyzing Digital Signals