Protocol Analysis
R&S
®
RTM20xx
178User Manual 1317.4726.02 ─ 01
Active
Defines the logic levels of the bus. The idle state corresponds to a logic 1, and the start
bit to a logic 0. Active-high (high=1) is used, for example, for control signals, while active-
low (low=1) is defined for data lines (RS-232).
Remote command:
BUS<b>:UART:DATA:POLarity on page 400
BUS<b>:UART:POLarity on page 400
Parity
Defines the optional parity bit that is used for error detection.
"None"
No parity bit is used.
"Even"
The parity bit is set to "1" if the number of "1"s in a given set of bits is
odd (not including the parity bit).
"Odd"
The parity bit is set to "1" if the number of "1"s in a given set of bits is
even (not including the parity bit).
Remote command:
BUS<b>:UART:PARity on page 401
Stop Bits
Sets the number of stop bits: 1; 1.5 or 2 stop bits are possible.
Remote command:
BUS<b>:UART:SBIT on page 401
Symbol Size
Sets the number of data bits in a word (symbol) in a range from 5 to 9 bits.
Remote command:
BUS<b>:UART:SSIZe on page 400
Bit Rate
Sets the number of transmitted bits per second.
"Defined Bit
Rate"
Select a standard bit rate value from the list.
"User Bit Rate"
Enter a user defined value.
Remote command:
BUS<b>:UART:BAUDrate on page 401
Idle Time
Sets the minimal time between two frames – between the stop bit of the last word in a
frame and the start bit of the first word in the next frame.
Remote command:
BUS<b>:UART:BITime on page 402
UART/RS-232 Interface (Option R&S RTM-K2)
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