Serial bus analysis
R&S
®
RTM3000
263User Manual 1335.9090.02 ─ 09
Clock
Selects the input channel of the clock line.
If the MSO option R&S RTM-B1 is installed, you can use logic channels as source.
Remote command:
BUS<b>:SPI:CLOCk:SOURce on page 608
BUS<b>:SSPI:CLOCk:SOURce on page 610
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 608
BUS<b>:SSPI:CLOCk:POLarity on page 611
MOSI / MISO / Data
Select the input channel of the data lines. MOSI is mandatory, the MISO line is
optional.
If the MSO option R&S RTM-B1 is installed, you can use logic channels as source.
Note: MISO is available only on bus 1 and bus 3. On bus 2 and bus 4, you can set
only one "Data" line. The MISO line occupies a second bus line. Thus, if MISO is used
on bus 1 or bus 3 , bus 2 or bus 4 is not available respectively.
Remote command:
BUS<b>:SPI:MOSI:SOURce = BUS<b>:SPI:DATA:SOURce on page 608
BUS<b>:SPI:MISO:SOURce on page 608
BUS<b>:SSPI:MOSI:SOURce = BUS<b>:SSPI:DATA:SOURce on page 611
BUS<b>:SSPI:MISO:SOURce on page 611
Polarity
Selects if the transmitted signal is high active (high = 1) or low active (low = 1).
For CS, the default is low active.
For MOSI / MISO, the default is high active.
For data, the default is high active.
Remote command:
BUS<b>:SPI:MOSI:POLarity = BUS<b>:SPI:DATA:POLarity on page 609
BUS<b>:SPI:MISO:POLarity on page 609
BUS<b>:SSPI:MOSI:POLarity = BUS<b>:SSPI:DATA:POLarity on page 611
BUS<b>:SSPI:MISO:POLarity on page 612
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 > "Technology".
SPI bus (option R&S
RTM-K1)
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