Rohde & Schwarz RTP Series - USB 2.0 Trigger

Protocol analysis
R&S
®
RTP
810User Manual 1337.9952.02 ─ 12
Remote command:
BUS<m>:USB:DIFFerential:SOURce on page 2006
Thresholds
Sets the threshold value for the digitization of each signal line. If the signal value on the
line is higher than the threshold, the signal state is high. Otherwise, if the signal value
is below the threshold, the signal state is considered low.
"Threshold"
Enter the value directly in the field.
"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>:USB:DPLus:THReshold on page 2006
BUS<m>:USB:DMINus:THReshold on page 2006
BUS<m>:USB:DIFFerential:THReshold on page 2007
BUS<m>:SETReflevels on page 1548
13.18.2.2 Configuring USB signals
For configuration, assign the lines to the input channels and define the active states
and the logical thresholds.
For details on configuration settings, see Chapter 13.18.2.1, "USB 2.0 configuration
settings", on page 806.
Serial Bus Setup
1. Press the [Protocol] key on the front panel.
2. Select the tab of the bus you want to set up, for example "SB1".
3. In the "Setup" tab, select the protocol: "USB 2.0".
4. Tap "Protocol" and select the protocol: "USB 2.0".
5. Tap "Protocol type" and select the protocol type that you want to set up.
6. Depending on the protocol type, select the waveform for each of the available "D+",
"D-", "Differential", "Data", and "Strobe" lines.
7. Set the logical thresholds: Either to the middle reference levels with "Find thresh-
olds", or enter a user-defined value directly in the "Threshold" fields.
8. Enable "Decode".
13.18.3 USB 2.0 trigger
If you need information on how to get started with triggering on USB 2.0 signals, see
Chapter 13.18.3.2, "Triggering on USB 2.0", on page 819. Otherwise proceed with the
USB 2.0 trigger settings.
USB (option R&S
RTP-K60)