Protocol analysis
R&S
®
RTO6
823User Manual 1801.6687.02 ─ 05
Data, Strobe
Define the source settings for the data and the strobe signals in USB HSIC protocol.
Y
ou can select analog channels
"C1" to "C4", and also active math and reference
waveforms as source. If you want to trigger on the serial bus, analog channel sources
are required.
Remote command:
BUS<m>:USB:DATA:SOURce on page 2149
BUS<m>:USB:STRobe:SOURce on page 2149
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 2149
BUS<m>:USB:DMINus:THReshold on page 2150
BUS<m>:USB:DIFFerential:THReshold on page 2150
BUS<m>:USB:DATA:THReshold on page 2150
BUS<m>:USB:STRobe:THReshold on page 2150
BUS<m>:SETReflevels on page 1671
13.20.2.2 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 13.20.2.1, "USB 2.0 configuration
settings", on page
818.
Serial Bus Setup
1.
Press the [Bus] 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 "Protocol" = "USB 2.0".
4. Tap "Protocol type" and select the protocol type that you want to set up.
5. Depending on the protocol type, select the waveform for each of the available "D+",
"D-", "Differential", "Data", and "Strobe" lines.
6. 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.
7. Enable "Decode".
USB (option R&S RT
O6-K570)
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