Protocol analysis
R&S
®
RTE
554User Manual 1326.1032.02 ─ 20
Remote command:
BUS<m>:UART:RX:THReshold on page 1478
BUS<m>:UART:TX:THReshold on page 1479
BUS<m>:UART:TECHnology on page 1479
BUS<m>:SETReflevels on page 1421
BUS<m>:FAUToset on page 1421
Polarity
Defines the logic levels of the bus. The idle state corresponds to a logic 1. the start bit
to a logic 0. "Idle high" (high=1) is used, for example, for control signals, while "Idle
low" (low=1) is defined for data lines (RS-232).
Remote command:
BUS<m>:UART:POLarity on page 1481
Bit rate
Sets the number of transmitted bits per second. To select a bit rate from list of prede-
fined values, tap the icon beside the "Bit rate" field. To enter a specific value, open the
keypad. The list of predefined values is also available in the keypad.
Remote command:
BUS<m>:UART:BITRate on page 1480
BUS<m>:UART:BAUDrate on page 1480
Data bits
Sets the number of data bits of a word in a range from 5 bits to 8 bits. If no parity bit is
used, then 9 data bits are possible.
Remote command:
BUS<m>:UART:SSIZe on page 1481
Bit order
Defines if a word starts with msb (most significant bit) or lsb (least significant bit). The
display of the decoded signal considers this setting, results are displayed in the speci-
fied order.
Stop bits
Sets the number of stop bits: 1 or 1.5 or 2 stop bits are possible.
Remote command:
BUS<m>:UART:SBIT on page 1481
Parity
Defines the optional parity bit that is used for error detection.
"None"
No parity bit is used.
"Odd"
The parity bit is set to "1" if the number of data bits set to "1" is even.
"Even"
The parity bit is set to "1" if the number of data bits set to "1" is odd.
"Mark"
The parity bit is always a logic 1.
"Space"
The parity bit is always a logic 0.
"Don't care"
The parity is ignored.
UART/RS-232/RS-422/RS-485 (option R&S RTE-K2)
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