User manual

Protocol Analysis
R&S
®
RTO
272User Manual 1316.0827.02 ─ 06
SS, MISO, MOSI
Configures the Slave Select, MISO and MOSI lines.
Source ← SS, MISO, MOSI
Sets the input channel of the selected line. Waveform 1 of channel signals, math wave-
forms, reference waveforms, or no waveform can be selected. For triggering on a serial
bus, a channel signal is required.
SCPI command:
BUS<m>:SPI:SSELect:SOURce on page 664
BUS<m>:SPI:MISO:SOURce on page 665
BUS<m>:SPI:MOSI:SOURce on page 665
Polarity ← SS, MISO, MOSI
Selects whether transmitted data or the slave select signal is high active (high = 1) or low
active (low = 1).
SCPI command:
BUS<m>:SPI:SSELect:POLarity on page 665
BUS<m>:SPI:MISO:POLarity on page 665
BUS<m>:SPI:MOSI:POLarity on page 666
Threshold
Sets the threshold value for digitization of signals for each line. If the signal value on the
line is higher than the threshold, the signal state is high. Otherwise, the signal state is
considered low if the signal value is below the threshold. The interpretation of HIGH and
LOW is defined by the Polarity.
There are three ways to set the threshold:
●
"Threshold"
Enter the value directly in the field.
●
"Set to 50%"
Executes the measurement of reference levels and sets the thresholds to the middle
reference level of the measured amplitude.
●
"Preset"
Selects the default threshold voltage for various signal technologies from a list. The
value is set to "Manual" if the threshold was set with "Set to 50%", or was entered
directly.
SCPI command:
BUS<m>:SPI:SCLK:THReshold on page 667
BUS<m>:SPI:MISO:THReshold on page 667
BUS<m>:SPI:MOSI:THReshold on page 667
BUS<m>:SPI:SSELect:THReshold on page 667
BUS<m>:SPI:TECHnology on page 666
SPI Bus