Serial Bus Analysis
R&S
®
RTB2000
175User Manual 1333.1611.02 ─ 04
Threshold, Find Threshold.......................................................................................... 175
Word Size....................................................................................................................176
Idle Time..................................................................................................................... 176
Chip Select
Selects the input channel of the chip select (CS) line. Only available in the SPI setup.
If the MSO option R&S RTB-B1 is installed, you can use logic channels as source.
Remote command:
BUS<b>:SPI:CS:SOURce on page 373
Clock
Selects the input channel of the SPI or SSPI clock line.
If the MSO option R&S RTB-B1 is installed, you can use logic channels as source.
Remote command:
BUS<b>:SPI:CLOCk:SOURce on page 373
BUS<b>:SSPI:CLOCk:SOURce on page 375
Slope
Selects if data is sampled on the rising or falling slope of the clock. The clock slope
marks the begin of a new bit.
Remote command:
BUS<b>:SPI:CLOCk:POLarity on page 374
BUS<b>:SSPI:CLOCk:POLarity on page 376
Data
Selects the input channel of the data line (MOSI or MISO line).
If the MSO option R&S RTB-B1 is installed, you can use logic channels as source.
Remote command:
BUS<b>:SPI:DATA:SOURce on page 374
BUS<b>:SSPI:DATA:SOURce on page 376
Polarity
Selects if the transmitted signal is high active (high = 1) or low active (low = 1).
For CS, the default is low active.
For data, the default is high active.
Remote command:
BUS<b>:SPI:DATA:POLarity on page 374
BUS<b>:SSPI:DATA:POLarity on page 376
Threshold, Find Threshold
Set the signal threshold for the source channel. Enter a value, or use "Find Threshold"
to set the threshold to the middle reference level of the measured amplitude.
For analog channels, you can find the value also in the "Vertical" menu > "Chan-
nel <n>" >"Threshold"
For logic channels, you can find the value also in the "Logic" menu > "Threshold".
SPI/SSPI Bus (Option R&S
RTB-K1)
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