Serial Bus Analysis
R&S
®
RTC1000
120
User Manual 1335.7352.02 ─ 02
11 Serial Bus Analysis
To trigger and decode serial buses on the digital channels and on the analog inputs,
the following options are available:
●
R&S
RTC-K1: I
2
C and SPI buses
●
R&S
RTC-K2: UART/RS-232 buses
●
R&S
RTC-K3: CAN and LIN buses
The serial bus analysis is performed with 1/8 of the sampling rate.
The usage of digital channels requires the logic probe R&S
RT-ZL03 and option
R&S
RTC-B1.
In the "BUS" menu, you find also the settings for parallel buses. Parallel buses are
dedicated for analysis of logic channels and described in
The analysis of parallel and serial data consists of the following three basic steps:
●
Protocol configuration (bus type / protocol-specific settings)
●
Decoding (Display of decoded data / zoom / bus table)
●
Trigger (Start / stop / serial pattern)
11.1 Bus Configuration
Before you can adjust the settings for the trigger and decoding functions, you must
define a bus. Two buses, B1 and B2, can be defined.
Before you configure the bus, set the correct logic level (threshold).
●
●
"To set the threshold for logic states"
default value is 500
mV.
To define a bus
1. Press the BUS key in the Vertical section until it lights up in white.
2. In the short menu, press the softkey "B1" or "B2" until a menu opens.
Alternatively, press the MENU button in the Vertical section and press the top soft-
key to define the bus.
3. Press "BUS TYPE" and use the UNIVERSAL knob to select one of the following
bus types:
● "PARALLEL" and "PARALLEL CLOCKED": analysis of logic channels, see
Chapter 9.5.1, "Parallel / Parallel Clocked Bus"
Bus Configuration
