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Serial Bus Analysis
R&S
®
RTC1000
124User Manual 1335.7352.02 ─ 04
BUS TABLE
Activates or deactivates the list view. Generally, a complete message (frame) of a pro-
tocol is displayed in a row. The columns contain time information, data, and address
message if applicable. The number of rows in the table is identical to the number of
complete message frames in the instrument memory. The softkey "TAB" in the "BUS"
short menu activates or deactivates the bus table without opening a menu.
TRACK FRAME
Enables scrolling the bus table and simultaneously jump to the selected position in the
memory using the [Universal] knob. Tracking is only possible if acquisition has been
stopped. This function is also available in the short "BUS" menu: "TRK" (= Track).
FRAME TIME DIFFERENCE
If activated, the bus table shows the time difference to the previous frame (data
packet). This column is labeled as "TIME DIFF".
If deactivated, the absolute time in relation to the trigger point is displayed in the col-
umn "START TIME".
POSITION
Moves the bus table to the top or bottom of the screen, or displays the bus table in full
screen. You can also use the softkey "POS" in the "BUS" short menu to toggle the
position.
SAVE
Saves the decoding results in a CSV file on USB flash drive.
11.3
I
2
C Bus (Option R&S
RTC-K1)
For I
2
C bus trigger and decoding, you need the R&S RTC-K1 option.
The I
2
C bus is a two-wire bus, which was developed by Philips (today known as NXP
Semiconductor).
An I
2
C bus has the following properties:
●
Two wires: clock (SCL) and data (SDA).
●
Master-slave communication: the master provides the clock pulse and selects the
slave.
●
Addressing: Each slave can be addressed with a unique address. Multiple slaves
can be linked with each other and can be addressed by the same master.
●
Read/Write bit: Master reads data (= 1) or writes data (= 0).
●
Acknowledge bit: issued after each byte
I
2
C Bus (Option R&S RTC-K1)
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