User manual

Serial Bus Analysis
R&S
®
RTB2000
201User Manual 1333.1611.02 ─ 06
Note: TX is available only on bus 1. On bus 2, you can set only one "Source" line. The
TX line occupies a second bus line. Thus, if TX is used on bus 1, bus 2 is not available.
Remote command:
BUS<b>:UART:RX:SOURce = BUS<b>:UART:DATA:SOURce on page 427
BUS<b>:UART:TX:SOURce on page 427
Polarity
Selects if the transmitted data is high active (high = 1) or low active (low = 1). The set-
ting affects both lines.
High active is used, for example, for control signals, while low active is defined for data
lines (RS-232).
Remote command:
BUS<b>:UART:DATA:POLarity on page 428
BUS<b>:UART:POLarity on page 428
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 > "Threshold".
Remote command:
CHANnel<m>:THReshold on page 273
CHANnel<m>:THReshold:FINDlevel on page 273
DIGital<m>:THReshold on page 468
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 data bits set to "1" is odd.
Adding the parity bit makes the data word's parity even.
"Odd"
The parity bit is set to "1" if the number of data bits set to "1" is even.
Adding the parity bit makes the data word's parity odd.
Remote command:
BUS<b>:UART:PARity on page 429
Stop Bits
Sets the number of stop bits: 1 or 1.5 or 2 stop bits are possible.
Remote command:
BUS<b>:UART:SBIT on page 429
Bit Rate
Sets the number of transmitted bits per second.
"Predefined"
Selects from a list of predefined bit rates between 300 Bit/s and
1 MBit/s.
UART / RS232 (Option R&S RTB-K2)