User Manual

MEASUREMENT
19
UART Serial Bus Interface
The UART serial bus software is designed to decode RS232 and
other common RS-232 variants such as RS-422, RS-485. The
software configuration is also flexible enough to decode the many
proprietary protocols based on RS-232.
Background
Basic RS-232 protocol uses single-ended data
transmissions. The signal voltage levels can be
high (±15V) and employ active low signaling.
High speed variants of RS-232, such as RS-422 and
RS-485 use differential signaling and commonly
employ low voltage differential signals with active
high signaling.
Universal Asynchronous Receiver / Transmitter
(UART) or RS-232 driver/receiver ICs commonly
used for embedded applications typically use
active high signaling with standard IC signal
levels.
Panel operation
7. Insert each of the bus signals (Tx, Rx) to one of
the oscilloscope channels.
8. Press the corresponding bus key,
B1 or B2.
9. Press Bus from the bottom menu
and choose the UART serial bus on
the side menu.