Mixed signal option (MSO, R&S
RTO6-B1)
R&S
®
RTO6
993
User Manual 1801.6687.02 ─ 05
14.1.3
Using digital probes
Ensuring accurate measurement results
The mixed-signal-option (MSO, R&S
RTO6-B1) with connected probe leads is consid-
ered as a test probe, according to EN 61326-2-1, clause 5.2.4.101. Therefore, the
measurements are sensitive to electromagnetic interference. Consider additional
shielding methods to avoid interference.
Consider the following guidelines for good probing practices:
●
The ground lead from each digital channel group (D15–D8 and D7–D0) should be
attached to the ground of the DUT if any channel within the group is being used for
data capture. The ground lead improves signal fidelity to the oscilloscope, ensuring
accurate measurements.
●
For high-speed timing measurements (rise time < 3 ns), each digital channel probe
should use its own ground.
1. Connect the digital probe cable to any of the MSO connectors on the rear panel of
the instrument as shown on the Documentation Card delivered with the digital
probe.
2. Connect the ground lead on each set of channels (each pod) with a probe grabber.
3. Connect a grabber to one of the probes leads.
4. Connect the grabber to a node in the circuit that you want to test.
5. For high-speed signals, connect a ground lead to the probe lead. Connect the
ground lead to ground in the device under test.
6. Repeat these steps until you have connected all points of interest.
14.1.4
Configuring digital channels and parallel buses
The configuration of a parallel bus includes the selection and setup of the digital chan-
nels, the configuration of the bus display, and, if necessary, the clock configuration.
For a detailed description of the settings, see
Chapter 14.1.1, "Parallel buses - configu-
1. Open "Menu" > "Logic" > "Setup".
2. Enable the digital channels to be displayed and included in the bus.
To enable or disable all channels of a pod at once, tap "Enable D7-D0" or "Enable
D15-D8".
Enabling one or more channels also enables the display of the signals - "Show
channels", and enables the parallel bus. If another active bus already uses the
same digital channel, the instrument disables this bus and shows a message.
Digital channels and parallel buses
