Protocol analysis
R&S
®
RTP
751User Manual 1337.9952.02 ─ 12
"Threshold"
Directly sets the threshold values.
●
For Manchester: upper threshold in the upper field, lower thresh-
old in the lower field.
●
For NRZ Clocked: clock threshold in the upper field, data thresh-
old in the middle field and enable threshold in the lower field. Hys-
teresis values are in the right column.
●
For NRZ Unclocked: data threshold in the upper field and enable
threshold in the lower field. Hysteresis values are in the right col-
umn.
Remote command:
BUS<m>:CMSB:MANChester:THReshold:HIGH on page 1933
BUS<m>:CMSB:MANChester:THReshold:LOW on page 1934
BUS<m>:CMSB:NRZ:THReshold:CLCK on page 1938
BUS<m>:CMSB:NRZ:THReshold:DATA on page 1939
BUS<m>:CMSB:NRZ:THReshold:ENBLe on page 1939
BUS<m>:CMSB:NRZ:HYSTeresis:CLCK on page 1938
BUS<m>:CMSB:NRZ:HYSTeresis:DATA on page 1939
BUS<m>:CMSB:NRZ:HYSTeresis:ENBLe on page 1939
"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>:SETReflevels on page 1548
"Couple
thresholds"
●
For Manchester and Manchester II coding, the upper and lower
thresholds are coupled to voltage values with the same magni-
tude but opposite sign (positive for the upper threshold and nega-
tive for the lower threshold). However, if the upper threshold is set
to a negative voltage or the lower threshold is set to a positive
voltage, coupling is disabled, and the other voltage (the one that
was not actively set) is automatically adjusted, to avoid an upper
threshold below the lower one, or a lower threshold above the
upper one.
●
For NRZ Clocked coding, the clock and data threshold values are
coupled to the same voltage.
Remote command:
BUS<m>:CMSB:MANChester:THReshold:COUPling on page 1934
BUS<m>:CMSB:NRZ:THReshold:COUPling on page 1940
13.15.2.2 Advanced
Access: [Protocol] > "Advanced" tab.
Custom: Manchester / NRZ (option R&S
RTP-K50)M
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