R&S RTO6, User Manual

Page: 728 / 2677

Protocol analysis
R&S
®
RTO6
728 User Manual 1801.6687.02 ─ 05
Ethernet Variant
Defines the Ethernet protocol variant and transmission speed.
"10BASE-T"
Selects the Ethernet protocol variant 10BASE-T (standard data rate
10
Mbit/s).
"100BASE-TX"
Selects the Ethernet protocol variant 100BASE-TX, which provides
100
Mbit/s use data rate. Due to 4b/5b encoding, the raw data rate on
the line is 125 Mbit/s. This value is used by R&S RTO6-K540 as the
bit rate default for 100BASE-TX.
Remote command:
BUS<m>:ETHernet:VARiant
on page 2017
Source
Defines the source settings for the data signal.
Permitted source selections are the analog, mathematical, and reference channels.
As soon as the serial bus trigger has been selected, the only permitted source selec-
tions are the analog channels "C1"
–
"C4", which are required for triggering.
Remote command:
BUS<m>:ETHernet:SOURce
on page 2017
Polarity
Defines the polarity ("Normal" or "Inverted") of the data signal. This setting is only avail-
able in 10BASE-T.
Remote command:
BUS<m>:ETHernet:POLarity
on page 2017
Thresholds
Sets the threshold value for the digitization of each signal line. If the signal value on the
line is higher than the upper threshold, the signal state is high. Otherwise, if the signal
value is below the lower threshold, the signal state is considered low.
"Thresholds" Enter the values directly: upper threshold in the upper field, lower
threshold in the lower field.
"Autoset" Starts software algorithms for determining the signal threshold levels
and bitrate.
"Find thresh-
olds" Executes the measurement of reference levels and sets the thresh-
olds to the middle reference level of the measured amplitude.
"Couple
thresholds" Couples threshold settings between upper and lower threshold.
Remote command:
BUS<m>:ETHernet:THReshold:HIGH
on page 2018
BUS<m>:ETHernet:THReshold:LOW
on page 2018
BUS<m>:ETHernet:PRESet
on page 2018
BUS<m>:SETReflevels
on page 1671
BUS<m>:FAUToset
on page 1671
Ethernet 10BASE-T and 100BASE-TX (option R&S RTO6-K540)